Respiratory Disease Flashcards
Hypoxia
Oxygen levels in the blood, lungs, and/or tissues is low
Hypoxemia
Insufficient oxygenation of the blood
Respiratory stimulant when PaCO2 Less than 50mmHg
Hypercapnia
Increased CO2 levels, respiratory stimulant
Cyanosis
Bluish to red-purple color in the tissues, due to increase amounts of deoxygenated or reduced hemoglobin
Arterial SaO2 73 and 78% pulse ox (PaO2 39-44mmHg) before cyanosis is found
Dyspnea
Difficult or labored breathing
What should you avoid with Dyspnea?
Avoid excessive stress or struggling
Avoid dorsal recumbency for radiographs
What should you do for an animal with dyspnea?
give oxygen immediately
Stridor
High pitched inspiratory noise
rapid flow of air passed a rigid obstruction, paralyzed/collapsed larynx
Stertor
Low pitched inspiratory noise - gurgling or snoring sound produced as air passes soft tissue obstruction
Orthopnea
Shortness of breath when lying down - adopt a strange position
Sternal recumbency with elbows abducted, the neck extended and open mouth breathing
What age of animals usually has Ciliary dyskinesia?
Young animals
What is the hallmark sign of Lower airway disease?
Cough
What do you see with upper airway disease?
Nasal discharge Sneezing/reverse sneezing increased effort in inspiration Audible sounds (Stridor/Stertor) Inability to breath if mouth is closed Pawing/rubbing at face
What do you see with Lower airway disease?
Cough
Respiratory distress
Increased effort on expiration
Crackles and wheezes audible on auscultation
What are the characteristics of discharge?
Serous Mucoid Mucopurulent purulent hemorrhagic
What accompanies acute nasal disease?
sneezing
What accompanies chronic nasal disease?
purulent to hemorrhagic discharge
Sneezing
Protective mechanisms of the upper airways
What is the hallmark of a tracheal or pulmonary disease or cardiac failure?
Cough
Cough
Forceful expiratory effort/protective reflex
What are triggers of coughing?
Irritant receptors
inflammatory products
excessive secretions
airway compression or collapse
What are the classifications of coughs?
Dry/non productive
Moist/ productive
Harsh/ intermittent or paroxysmal
Wet cough
coughs and then swallows
Dry cough
coughs but does not swallow the product of the cough
Paroxysmal cough
a sudden intermittent condition
Tracheal disorders
Tracheal collapse Hypoplastic trachea infectious tracheobronchitis Canine infectious influenza Perihilar lymphadenopathy Heart bas tumor
Panting
dissipates heat
normal in a dog
associated with stress or respiratory distress in cats
Dyspnea
difficult or labored breathing
Tachypnea
Increased respiratory rate
May or may not be associated with respiratory distress
Orthopnea
Difficulty breathing when not in the upright position
Animals will stand with their forelimbs abducted
What is orthopnea common with?
Pleural disease
What is the cause of Respiratory Distress?
Insufficient oxygen in inspired air Insufficient ventilation Insufficient circulation Insufficient erythrocytes Abnormal or low hemoglobin concentrations
What are the causes of cyan colored mucous membranes?
Lack of oxygen Abnormal hemoglobin - toxins Cardiac disease Pulmonary disease Cardiopulmonary arrest
What are normal lung sounds?
bronchovesicular
Where are Bronchial lung sounds heard?
loudest over the hilus during expiration
Where are vesicular lung sound heard?
loudest on inspiration at the periphery of the lungs, normal air filling lungs “rustling of leaves” very soft sounds
Crackles
snapping open of the airways that have closed due to fluid in or around them
Wheezes
causes by airflow through a narrow opening - airways are constricted/narrowed
Snaps
loud snap over hilus at end of expiration indicates collapse of the intrathoracic trachea, carina or mainstem bronchi
Goose honks
sound with tracheal collapse
Pleural friction rubs
creaking/grating sound due to roughened pleural surfaces rubbing against each other
Pleural disease
Pleural effusion
Pneumothorax
Pleural effusion
Lungs sounds are auscultated dorsally
Lungs floating in fluid
Muffled sounds ventrally
Heart sounds are also reduced
Pneumothorax
Absence of lung sounds dorsally due to compression
likely present in the ventral field
How do you distinguish between a fluid or air density?
Use your finger/small mallet to strike the chest cavity and listen to the sound
Fluid gives a dull sound
Pneumothorax will give an increased resonance
When is Rhinoscopy performed?
after imaging
When would you perform a Nasal Flush?
Foreign body suspect
What does Bronchoscopy evaluate?
Larynx
Trachea
Bronchi
What are the indications for a Bronchoalveolar lavage?
Lung Disease involving small airway
What is a landmark for Transtracheal wash and aspirate?
Cricothyroid ligament
What are the indications for a Transthoracic lung aspiration?
Intra-thoracic mass lesions in contact with thoracic wall
What is a chest tube used to treat?
Pyothorax
Bronchodilators
usually for bronchitis
When do you use anti-tussives?
in dogs with dry & non-productive cough due to airway collapse or irritant tracheitis
Nebulization
improves hydration of lower airways
What are the indications for oxygen?
to treat hypoxemia
to decrease workload of heat and lungs
What are the methods for oxygen treatment?
Face mask
Nasal catheter
Cage
Intratracheal
What are the differential diagnosis for nasal discharge?
Neoplasia
Rhinitis
Nasal Foreign Body
Dental Disease/ oronasal fistulas
Trauma
Congenital: Cilliary dyskinesis or Nasopharyngeal stenosis
Systemic disorder: Coagulopathy or Pneumonia
What is the most common neoplasia of the nose?
Nasal Adenocarcinoma
What are the potential infectious agents that cause Feline upper respiratory disease complex?
Feline herpes virus Feline calicivirus Chlamydophila felis Mycoplasma spp. Coronavirus Bordetella spp
What do you see with Feline Herpes virus?
Ulcerative keratitis
punctate or dendritic ulcers
What do you see with Calicivirus?
ulcers on the nose, tongue, or hard palate, pneumonia, lameness
What do you see with Chlamydophila felis?
conjunctivitis with chemosis
How is feline herpes virus spread?
Direct contact
fomites
Where is Feline herpes virus shed?
Ocular secretions
Nasal secretions
pharyngeal secretions
How do you diagnose Feline Herpes virus?
Clinical signs
viral isolation
PCR
Epiphora
Fibrosis of the lacrimal ducts
What is the treatment for Feline Herpes Virus?
Topical antivirals: Idoxuridine, trifluridine, cidofovir
Oral antivirals: Famciclovir, acyclovir
Supportive care
What is the route for the Feline herpes virus vaccine?
Parental
Intranasal
Parental Feline Herpes Virus Vaccine
blocked by maternal antibodies does not prevent a carrier state
Intranasal Feline Herpes Virus Vaccine
Not blocked by maternal antibodies
Calicivirus
High mutation rate
Direct transmission or via fomites
What is the incubation period of Calicivirus?
2-4 days
What are the clinical signs of Calicivirus?
Oral and nare ulcers
Feline viral rhinotracheitis
How is FCV different from FHV?
Pneumonia is more common with FCV
FCV can result in gastrointestinal signs
FCV can cause lameness
Causes polyarthritis
What are two other syndromes associated with FCV?
Limping Kitten syndrome
Virulent hemorrhagic systemic syndrome
What are the clinical signs of Limping Kitten Syndrome?
Lameness
Ulcers on paws
sore joints
polyarthritis
Virulent hemorrhagic syndrome
Edema Hepatitis diarrhea pustular dermatitis hemorrhagic cystitis
What is the treatment for Feline Calicivirus?
Supportive: Antibiotics, Nursing care/rehydration
What is the sequelae to Feline Calicivirus?
Chronic rhinitis/sinusitis/conjunctivitis
Carrier state
Why is Interferon helpful with Feline Calicivirus?
It switches on the TH1 cell mediated response
What are the clinical signs of Chlamydophila felis?
Conjunctivitis
Chemosis
How do you diagnose Chlamydophila felis?
PCR
Cytology
What is the treatment for Chlamydophila felis?
Topical tetracylines or erythromycin
Systemic signs require oral doxycycline and azithromycin
How do you prevent Chlamydophila felis?
Vaccination
What is the treatment for cat flu?
- Outpatient treatment if possible
- Keep warm and hydrated
- Remove crusts
- Humidify air
- Topical decongestants for 1 to 2 days
- systemic antibiotics for secondary infection
- Topical ophthalmic solutions
- Oral antivirals
- Interferon
- Lysine
- Anti-inflammatories
What type of nasal discharge comes with bacterial rhinitis?
Mucopurulent or purulent nasal discharge
What causes Fungal rhinitis in dogs?
Aspergillus fumigatus
What causes fungal rhinitis in cats and dogs?
Cryptococcus neoformans var. neoformans
Where is Cryptococcus neoformans var. neoformans found?
Pigeon droppings
Where is Cryptococcus neoformans var gattii found?
eucalyptus trees
What does aspergillus cause in the dog?
Sneezing unilateral/bilateral nasal discharge
Facial distortion
Turbinate destruction
Nasal ulceration and depigmentation
What do you see on Rhinoscopy with Nasal Aspergillosis?
White plaques
What do you see on Tissue biopsy or cytology with Nasal Aspergillosis?
Hyphae
What is the treatment for Nasal Aspergillosis?
Debridement
Infused 1% clotrimazole or 2% eniloconazole into nasal cavity for 1 hour
What is the risk assocaited with treatment of aspergillosis?
Aspiration pneumonia
neurologic signs
What is a contraindication for treatment of aspergillosis?
damages cribiform plate
What are the systemic fungal medications used for the treatmetnt of Aspergillosis?
Itraconazole
Posaconazole
Vorixonazole
What is the transmission of Pneumonyssus caninum?
Direct
Where do Pneumonyssus caninum live?
Nasal cavities
Sinuses
How do you diagnose Pneumonyssus caninum?
Visualize the mites in nasopharynx or nasal cavity
What is the treatment for Pneumonyssus caninum?
Ivermectin
Milbemycin
Selamectin
Lymphoplasmacytic rhinitis
Chronic inflammatory rhinitis characterized by lymphocytic and plasmacytic infiltration into the nasal mucosa in the absence of any obvious underlying etiology
What are the clinical signs of Lymphoplasmacytic rhinitis?
Unilateral or bilateral nasal discharge but can be seroud or even hemorrhagic
sneezing ocular discharge
reverse sneezing
stertor
How do you diagnose Lymphoplasmacytic rhinitis?
CT/MRI
Destruction of the nasal septum, frontal sinus, cribiform plate
Rhinoscopy
Biopsy
What do you see on Rhinoscopy with Lymphoplasmacytic rhinitis?
Hyperaemic
edematous mucosa
easily traumatised and bleeds
turbinates are atrophied or destroyed
What is the treatment for Lymphoplasmacytic rhinitis?
avoid any smoke Nasal steroids Long term doxycycline Long term itraconazole Saline nasal flushes or hypertonic saline Maropitant
Substance P
a neuropeptide secreted by nerves and inflammatory cells
What is the mechanism of action for Cerenia?
Blocks substance P
What are the clinical signs of Nasal neoplasia?
Nasal discharge Decreased airflow Dysphagia Sneezing facial deformity epiphora exophthalmos dyspnea open mouth breathing hard palate abnormalities Neurological signs if the cribiform plate is invaded
Epiphora
discharge from the eye
How do you diagnose Nasal neoplasia?
Fine needle aspirates of draining lymph nodes Radigraphy CT/MRI Nasal discharge cytology Rhinoscopy Nasal biopsy
What is treatment of Nasal Neoplasia?
Surgery
Radiation
Chemotherapy
What is the treatment of choice for most nasal neoplasia?
Radiation
What is chemotherapy useful in the treatment of?
Lymphoma
What is the prognosis for nasal neoplasia?
3-6 months
What are the most common nasal neoplasia in dogs?
Adenocarcinoma
Squamous cell carcinoma
What are the most common nasal neoplasia in cats?
Lymphoma
Adenocarcinoma
Ciliary dyskinesia
Immotile ciliary syndrome
Inherited autosomal recessive trait
Poor clearance of mucous from the airways
chronic mucous plugging and inflammation
What are the clinical signs of Primary ciliary dyskinesia?
rhinosinusitis
bronchitis
bronchopneumonia
bronchiectasis
How do you diagnose Primary Ciliary dyskinesia?
Biopsy or brush swab
Culturing
Electron microscopy
T/F? Nasal Neoplasia can result in exophthalmia, facial distortion, and sneezing?
True
T/F? The main clinical sign associated with nasal mites is sneezing?
True
T/F? Nasal aspergillus does not respond to systemic antifungal therapy?
False
T/F? “Wisp of cotton” in front of nares could indicate obstructive process if “wisp” does not move with dog’s breath?
True
What are the clinical signs of Tracheobronchial disease?
Cough Retch/gag Wheezing Inspiratory sounds Tachypnea Respiratory distress Cyanosis
What pathogens are responsible for Canine infectious respiratory disease complex?
Parainfluenza virus Canine adenovirus Mycoplasma spp. Bordetella spp. Canine distemper virus Canine respiratory coronavirus canine herpes virus canine influenza virus
Bordetella spp. mechanism of action
Attaches to the cilia of bronchial epithelium and interferes with motility resulting in mucous accumulation and inflammation
Transmission of Canine infectious respiratory disease complex?
Spread in respiratory secretion and fomites
What is the incubation of Canine infectious respiratory disease complex?
3-7 days
What is the clinical sign of Canine infectious respiratory disease complex?
Coughing
Clinical signs of Uncomplicated Canine infectious respiratory disease complex?
Non-sick animals that involves the upper airways. Cough elicited on tracheal palpation. Seroud oculonasal discharge gagging and retching can be found
Clinical signs of complicated Canine infectious respiratory disease complex?
Sick animasl that involves both the upper and lower airways. The cough is moist. The oculonasal discharge is more mucopurulent. May develop into bronchopneumonia
How do you diagnose Canine infectious respiratory disease complex?
Hemogram Thoracic radiographs Transtracheal wash cytology culture PCR panels for upper respiratory viruses and bacteria
What is the treatment for uncomplicated Canine infectious respiratory disease complex?
Restrict exercise
use doxycycline if bordetella is suspected
usually resolves within 2 weeks
Cough Suppressants
What is the treatment for complicated Canine infectious respiratory disease complex?
Restrict exercise Systemic antibiotics for 2 weeks - Doxycycline Nebulisation Cough supressants Bronchodilators
What are the side effects of Enrofloxacin in cats?
Retinal damage or brain damage in cats and cartilage damage in puppies
What are the side effects of Penicillin?
Anaphylaxis
Skin reaction
GI disease (Vomiting and diarrhea)
How do you prevent Canine infectious respiratory disease complex?
Avoid places where the dog could be infected
Vaccination
Sanitation
Ventilation in kennels
What are the different types of vaccination for Canine infectious respiratory disease complex?
Parenteral vaccination
Intranasal vaccination
How is Canine influenza transmitted?
Direct contact
Fomites
What are the clinical signs of Canine Influenza?
Coughing Sneezing Nasal discharge Fever Hemorrhagic pneumonia
How do you diagnose Canine Influenza?
PCR
Serology
Viral Isolation
What are the two forms of Canine Influenza?
Mild/uncomplicated
Severe/complicated
What are the clinical signs of Severe/complicated Canine Influenza?
Pyrexia
Hemorrhagic pneumonia
What is the treatment for Canine Influenza?
Supportive care
NSAIDs
Systemic antibiotics
What is the prevention of Canine Influenza?
Vaccination
isolate sick and exposed dogs
change clothes/wash hands
What is the life cycle of Oslerus osleri?
Larvae are ingested
Molt in the small bowel and migrate to the lungs, bronchi and trachea
Cream colored nodules in the trachea
What are the clinical signs of Oslerus osleri?
Coughing
Wheezing
dyspnea
How do you diagnose Oslerus Osleri?
Radiographs
Bronchoscopy
tracheal/bronchial brushes or biopsies
fecal examination
What is the treatment for Oslerus Osleri
Fenbendazole
Ivermectin
What animals are predisposed to Tracheal collapse?
Middle aged to older dogs
Toy or small breed dogs
Tracheal collpase
Weak cartilage with flattening of tracheal rings, resulting in mechanical irritation, edema, and inflammation
What is the clinical signs of Tracheal collapse?
Goose honking cough Exacerbated by excitement, exercise and eating Elicited with tracheal palpation causes cyanosis and collapse/syncope hepatomegaly cardiac murmur
What is the best diagnostic tool for tracheal collapse?
Bronchoscopy
What are the problems with a stint for tracheal collapse?
Can Fail
Predisposed to infection
Expensive
What is the treatment for tracheal collapse?
Sedation Oxygen therapy Cough suppressant Corticosteroid intubation Antibiotics for secondary infection
What should you avoid in tracheal collapse?
Avoid neck collars
Avoid excitement
Avoid dust, smoke, pollens, carpet powders
What are the surgical interventions for tracheal collapse?
Extraluminal stents
Endoluminal stents
Canine chronic bronchitis
Inflammation of the bronchial walls that results in thickened walls, increased mucous which results in obstruction of small airways
What are the clinical signs of Canine Chronic bronchitis?
Daily cough for longer than 2 months
Expiratory wheezes
audible crackles
exercise intolerance
What is the long term sequelae to Canine chronic bronchitis?
Emphysema
bronchiesctasis
pneumonia
What is the signalment for Canine Chronic bronchitis?
Obese Small breeds usually less than 6 years old
What is used for diagnosis for Canine Chronic bronchitis?
radiographs
bronchoscopy
bronchial cytology
culture
What is the treatment for Canine Chronic bronchitis?
Eliminate triggers Keep hydrated Reduce weight if obese Prednisolone Bronchodilators Antibiotics Avoid cough suppressants
Bronchiectasis
Damage to the bronchial structure resulting in a thickened wall and dilation of the structure
Mucous cannot be cleared so it builds up
dilation of the bronchial tree is irreversible caused by the destruction of the muscle ad elastic tissue
What is the differential list for Felines presenting with a cough, wheeze, or respiratory distress?
Pulmonary parasites Heartworm Bacterial or viral bronchitis Toxoplasmosis Idiopathic pulmonary fibrosis Neoplasia - carcinoma Aspiration pneumonia Idiopathic feline bronchitis/asthma Chronic bronchitis
Asthma
Bronchial constriction
What are the clinical signs of Idiopathic feline bronchitis?
Chronic or intermittent cough acute respiratory distress Open mouth breathing audible wheezing Wheezes Crackles Increased expiratory effort
How do you diagnose Idiopathic feline bronchitis?
First tier:
Radiograph
CBS
Fecal examination
Second tier:
Transtracheal wash/bronchoscopy
Cytology/culture
What can be found on Radiographs for Idiopathic feline bronchitis?
Bronchial pattern
Reticular interstitial and patchy alveolar opacities
Hyperinflation
flattening of the diaphragm
Air-trapping
constriction of small airways does not allow inspired to be exhaled and lungs overinflate
What do you find on bronchoscopy for Idiopathic feline bronchitis?
Mucosal hyperemia
Increased mucous
Perform broncho-alveolar lavage
What do you see on cytology with Idiopathic feline bronchitis asthma?
increased eosinophils or neutrophils and mixed inflammation
What do you see on cytology with Idiopathic feline bronchitis in infectious patients?
degenerative neutrophils and/or intracellular bacteria
What is the treatment for Idiopathic feline bronchitis?
No stress
oxygen rich environment
Rapid acting corticosteroid
Bronchodilator choices: albuterol, terbutaline
What is the long term management for Idiopathic feline bronchitis?
- Environmental management: Improve indoor air quality r Eliminate potential allergens/irritants
- Anti-inflammatories - glucocorticoids
What are the advantages of Metered Dose inhaler?
Minimize systemic corticosteroid side effects
Easier to treat
high drug concentration delivered to the lungs
What are the disadvantages of Metered Dose Inhaler?
Increase risk of dental disease
Re-emergence of a latent herpesvirus infection
Local dermatitis
What are other possible long-term treatment for Idiopathic feline bronchitis?
Oral bronchodilator: Terbutaline or Albuterol oral
Antibiotics: Doxycycline, Chloramphenicol, or azithromycin
What is the prognosis for Idiopathic feline bronchitis?
Long term medical treatment needed
If untreated: permanent changes of chronic bronchitis with irreversible damage (fibrosis) and emphysema
Feline chronic bronchitis
Chronic airway inflammation typically in older cats
What is Feline chronic bronchitis characterized by?
Neutrophilic inflammation
Mucosal edema
Mucus gland hypertrophy
Excessive mucus production
What are the clinical signs of Feline Chronic bronchitis?
Same as asthma
Coughing daily
What does the management of Feline Chronic Bronchitis focus on?
Control of inflammation using glucocorticoids
What are the clinical signs of Pulmonary disease?
Difficulty breathing Increased rate and effort Coughing Exercise intolerance abnormal pulmonary sounds abnormal posture - Orthopnea
What is the most common cause of Inflammatory disease in dogs?
Bacterial
What is pneumonia characterized by?
soft ineffectual cough
What are the clinical signs of pneumonia?
soft ineffectual cough dyspnea tachypnea cyanosis nasal discharge exercise intolerance pyrexia lethargy anorexia
What are the most common bacteria in primary bacterial pneumonia in young dogs?
Bordetella spp.
Pasteurella spp.
How do you diagnose Bacterial pneumonia?
Hematology - left shift neutrophilic leucocytosis and Monocytosis
Thoracic radiographs - interstitial pattern, alveolar pattern
Transtracheal/endotracheal wash
cytology
culture
Bronchoscopy with bronchoalveolar lavage
What do you find on cytology with Bacterial pneumonia?
Degenerative neutrophils/monocytes
Intracellular bacteria
What can bacterial pneumonia result in?
Sepsis which can lead to ALI and ARDS
What is the treatment for Bacterial pneumonia?
Antibiotics: Begin with injectable therapy and then change to oral medications
Nebulisation: sterile saline + gentamycin
Supportive Care: IV fluids, oxygen theapy, and coupage
What are the Respiratory clinical signs for Mycotic pneumonia?
Abnormal respiratory pattern Tachypnea Cough Exerrcise intolerance Systemic signs: inappetance, weight loss, fever, lameness, lymphadenopathy, chorioretinitis or anterior uveitis, draining fistula tracts
How do you diagnose Mycotic pneumonia?
Urine or serum antigen titers
Cytology/histopathology (biopsy)
What is the treatment for Mycotic pneumonia?
Depends on fungal sensitivity
Polyene antifungals: amphotericin B
Triazoles: itraconazole, posaconazole, voriconazole, fluconazole
Imidazoles: clotrimazole, ketaconazole
What is the geographic location for Coccidiomycosis?
Arizona
What is the geographic location for Blastomycosis/ Histoplasmosis?
Ohio River Valley area
Where do you take cytology for mycotic pneumonia?
Lymph nodes draining lesions TTW ETW BAL pulmonary aspirate
What is the treatment for Mycotic pneumonia?
Oral medications: Itraconazole, Posaconazole, Voriconasole
IV/SC medications: Amphotericin B
Lipid complex form
What is the side effect of Amphotericin B?
Nephrotoxic
What is the problem with treatment for mycotic pneumonia?
Expensive and long term - 4 to 12 months
What is the prognosis for Mycotic pneumonia?
Depends on how disseminated the infection is
Poorer prognosis if the CNS is involved
80% of Blastomycosis or cryptococus is effectively treated
60% with coccidiomycosis recover
What is the geographic location for Blastomycosis?
Mississippi, Missouri and Ohio river valley area
What is the mode of infection for Blasto?
Inhalation of spores
What are the clinical signs of Blasto?
No clinical signs Fever Emaciated Lymphadenopathy Dry harsh cough exercise intolerance ocular lesions skin lesions: areas of redness to granulomas bone lesions
How do you diagnose Blasto?
Radiographs
Hematology: Chronic anemia, leukocytosis, left shift, lymphopenia, hyperglobulinemia, hypercalcemia
Cytology or Histopathology
Serology: AGID test, Radioimmunoassay, ELISA, PCR
What are the pathological findings of Blasto?
Pyogranulomatous lesions
What is the treatment for Blasto?
Amphotericin B IV
Triazole - Itraconozole
Where is Histoplasmosis found?
In bird or bat feces
What are the clinical signs of Histoplasmosis disseminated disease in cats?
Mental depression weight loss fever anorexia pale mucous membranes dyspnea tachypnea abnormal lung sounds
What are the clinical signs of Histoplasmosis disseminated disease in dogs?
Inappetance weight loss fever unresponsive to antibiotics dyspnea coughing abnormal lung sounds
What laboratory findings do you find with Histo?
Chronic anemia
Thrombocytopenia
Hypoalbuminemia
How do you diagnose Histo?
Radiographs
Ultrasound
Cytology
Histopathology
Where do you find Histo?
in mononuclear-phagocyte system
What is the therapy of choice for Histo?
Itraconazole
What is the treatment for Histo?
Itraconazole
Fluconazole
Voriconazole and posaconazole
Amphotericin B
Where do you find Cryptococcus?
Avian droppings
What are the clinical findings of Cryptococcus in cats?
Chronic infection Bilateral nasal discharge snuffly Firm to flocuant swelling over the bridge of the nose Lymphadenopathy Neurological signs
What are the clinical findings of Cryptococcus in dogs?
neurological signs
How do you diagnose Cryptococcosis?
Hematology Cytology: Nasal swab, nasal wash, FNA, BAL, pleural fluid, CSF, urine Tissue biopsy Fungal isolation Serology: Serum and CSF Latex agglutination procedure Test PCR
What is the treatment for Cryptococcus?
Surgery
Amphotericin B (8-9 months)
Itraconazole
Where do you find Coccidiomycosis?
Dry environment - SW USA
“Valley Fever”
What are the clinical signs of Coccidiomycosis for dogs?
Dry harsh cough hilar lymphadenopathy diffuse pulmonary interstitial disease fever anorexia weight loss weakness lameness
What is the clinical signs of Coccidiomycosis in cats?
Dry harsh cough hilar lymphadenopathy diffuse pulmonary interstitial disease fever anorexia weight loss weakness lameness
Cutaneous lesions!!
How do you diagnose Coccidiomycosis?
Hematology: Non-regenerative anemia, left shift neutrophilia and monocytosis, eosinophilia Thoracic radiographs: diffuse interstitial pattern, Milliary to nodular interstitial densities, Solitary nodules, Hilar lymphadenopathy Imaging: Ultrasound, MRI Cytology or Histopathology Fungal culture Serology Latex agglutination AGID test ELISA test
What is the treatment for Coccidiomycosis?
3-6 months of Ketoconazole, Itraconazole, or fluconazole
What is the prognosis for Coccidiomycosis?
Good for respiratory disease
Poor for disseminated disease
Where do you find aelurostrongylus abstrusus?
Feces
What kind of egg do Paragonimus kellicoti have?
Operculated egg
How do you find on hematology for aelurostrongylus abstrusus?
Eosinophilia
What do you find on Thoracic radiographs for aelurostrongylus abstrusus?
DIffuse nodular densities in the caudal lobes
What do you find on TTW/BAL with aelurostrongylus abstrusus?
Increased number of eosinophils and or larvae
What is the treatment for aelurostrongylus abstrusus?
Fenbendazole (for 10 days)
Ivermectin ( given once every 2 weeks)
What are the clinical signs for Paragonimus spp.?
Cough
Wheeze
respiratory distress
What do you find in the lungs with Paragonimus spp. ?
Cysts in the lungs
What happens if the cysts of Paragonimus spp. rupture?
pneumothorax
How do you diagnose Paragonimus spp.?
CBC: eosinophilia
Thoracic radiographs with cysts present
TTW/BAL
Fecal float with operculated egg
What is the life cycle for Paragonimus spp. ?
Egg is shed in the feces and then eaten by a snail and then a crustacean which is eaten by the Dog
Idiopathic pulmonary fibrosis - progressive interstitial fibrosis
Chronic fibrosis of the lung interstitium characterized by infiltration of fibroblasts
What is the signalment for Idiopathic pulmonary fibrosis - progressive interstitial fibrosis?
Middle or older Terrier - West Highland Terrier
What are the clinical signs of Idiopathic pulmonary fibrosis - progressive interstitial fibrosis?
Respiratory distress
tachypnea
Coughing increased with progression
Weight loss in cats
How do you diagnose Idiopathic pulmonary fibrosis - progressive interstitial fibrosis?
Inspiratory crackles on auscultation Thoracic radiographs: generalized or diffuse interstitial pattern Arterial blood gas: Hypoxemia TTW/BAL Lung FNA aspirate Lung biopsies
What provides a definitive diagnosis for Idiopathic pulmonary fibrosis - progressive interstitial fibrosis?
Lung biopsies
What is the treatment for Idiopathic pulmonary fibrosis - progressive interstitial fibrosis?
Corticosteroids
Cyclophosphamide or azathioprine
What is the prognosis of Idiopathic pulmonary fibrosis - progressive interstitial fibrosis?
Guarded
Progressive respiratory failure
What is the primary pulmonary neoplasia?
Adenocarcinoma
Squamous cell carcinoma
What are the metastatic pulmonary neoplasia?
Adenocarcinoma
Osteosarcoma/chondrosarcoma
Hemangiosarcoma/ oral or digital melanoma
What are the multicentric pulmonary neoplasia?
Lymphoma
What are the clinical signs for Pulmonary neoplasia?
Crackles wheezes muffled sunds cough dyspna tachypnea hemoptysis weight loss lameness dysphagia regurgitation edema of the head/neck
How do you diagnose pulmonary neoplasia?
Thoracic radiogaphs
Cytology: FNA, Bronchoscopy, Biopsy
What is the treatment for pulmonary neoplasia?
Surgical removal
Chemotherapy
What is the prognosis for pulmonary neoplasia?
Guarded to poor
Solitary mass or benign mass - good with surgical removal
What are the prognostic factors for pulmonary neoplasia?
Benign is better than malignant
Primary better than metastatic
Adenocarcinoma better than SCC
Small tumors are better than large tumors
Tumors involving one lobe better than multiple lobes
Pulmonary edema
Accumulation of fluid in alveoli or pulmonary interstitium
What are the four mechanisms of Non-cardiogenic pulmonary edema?
Vascular overload/ increased hydrostatic pressure
Decreased plasma oncotic pressure
Increased alveolar capillary membrane permeability
Lymphatic obstruction
What do you see on thoracic radiographs with Non-cardiogenic pulmonary edema?
Bilateral Alveolar pattern
What is the treatment for Non-cardiogenic pulmonary edema?
Aggressive control of primary disease Cage rest oxygen therapy supportive care PPV if required
What is the prognosis for Non-cardiogenic pulmonary edema?
Guarded with permeabiluty edema pathogenesis
Better when there is no fluid overload or renal function is intact
ALI
Acute Lung Injury
Acute Lung Injury - ALI
pulmonary inflammation and edema resulting in acute respiratory failure
ARDS
Acute Respiratory distress syndrome
Acute Respiratory distress syndrome - ARDS
severe manifestation of ALI, Hypoxemia is worse
What is ALI/ARDS most commonly secondary to?
Sepsis
systemic inflammatory distress syndrome
shock
bacterial pneumonia
What do you find on Thoracic auscultation with Pulmonary contusions?
Crackles
What is the concurrent pathology with trauma from Pulmonary contusions?
Pneumothorax/hemothorax Herniation Myocarditis Rib fractures hypotension
What is the treatment for Pulmonary contusions?
Oxygen therapy
IV fluids
Pain medication for trauma
Eosinophilic bronchopneumopathy
Inflammation of the lungs - thought to be due to hypersensitivity to some unknown antigen
What are the possible causes of Eosinophilic bronchopneumopathy?
Heartworm Lung parasites drugs inhaled allergens neoplasia fungal or bacterial infections
What is the signalment for Eosinophilic bronchopneumopathy?
Young or middle aged Siberian Huskies
What are the clinical signs of Eosinophilic bronchopneumopathy?
Harsh cough
Progressive respiratory difficulty
exercise intolerance
nasal discharge or anorexia/lethargy
How do you diagnose Eosinophilic bronchopneumopathy?
thoracic auscultation: Harsh, crackles, expiratory wheezes, Tracheal palpation may elicit a moist productive cough
Hematology: increased neutrophils and eosinophils
Thoracic radiographs: DIffuse bronchointerstitial pattern, alveolar infiltrates, bronchiectasis
Cytology: TTW, BAL, endotracheal wash with eosinophils predominate
What is the treatment for Eosinophilic bronchopneumopathy?
Fenbendazole
Corticosteroids
What is Pulmonary Thromboembolism (PTE) associated with?
Heartworm Immune-mediated hemolytic anemia Nephrotic syndrome Hyperadrenocorticism - hypercoagulability Pancreatitis DIC Endocarditis
What is the treatment for Pulmonary Thromboembolism (PTE)?
Oxygen supplementation No stress treat underlying diease Bronchodilators Prednisolone in IMHA and heartworm
What is the prognosis for Pulmonary Thromboembolism (PTE)?
Poor to grave
What are the respiratory signs of Pleural effusion and pneumothorax?
Rapid shallow breathing Dyspnea Open mouth breathing Cyanosis Exercise intolerance anorexia and lethargy
What do you find on physical exam with Pleural effusion and pneumothorax?
Pyrexia
Barrel-shaped chest with pneumothorax
Muffled heart sounds and diminished/muffled lung sounds ventrally
What causes Dorsal increased lung sounds?
Pleural effusion
What causes Dorsal decreased lung sounds?
pneumothorax
Pleural effusion
Accumulation of excessive amounts of fluid within the pleural space (cavity)
What causes an accumulation of Transudate of fluid within the pleural space (cavity)?
Congestive Heart Failure
What causes an accumulation of exudate of fluid within the pleural space (cavity)?
Pyothorax
What causes an accumulation of hemorrhage of fluid within the pleural space (cavity)
Trauma
What are mechanisms of fluid accumulation?
Decreased oncotic pressure - hypoalbuminemia
Increased hydrostatic pressure - CHF
Increased capillary membrane permeability - inflammation due to FIP, neoplasia, pyothorax
Lymphatic malfunction - obstruction or lymphanglectasia
What is the treatment for Pleural effusion?
Thoracocentesis
What is the cause of pyothorax in dogs?
Secondary to inhaled foreign bodies or penetrating injury, pneumonia
What is the cause of pyothorax in cats?
Secondary to penetrating bite wounds, oropharyngeal aspiration or URTI
How do you diagnose Pyothorax?
Cytology - degenerative neutrophils/bacteria
Culture
What is the treatment for Pyothorax?
Drainage and lavage through thoracotomy tube
Lavage
Long term antibiotics based on culture or cytology
What antibiotic treats anaerobes?
Metronidazole
What antibiotics are used to treat Gram negatives from cat bites?
Enrofloxacin
What can cause accumulation of Chyle in pleural space?
Trauma Neoplasia Cardiac disease Thoracic duct lymphangiectasia Inflamamtion Lung lobe torsion Idiopathic
What color is Chyle?
White to pink opaque
How do you diagnose Chylothorax?
Thoracocentesis
What is the treatment for Chylothorax?
Thoracic drainage
Low fat diet
Rutin
Ligation of thoracic duct
Rutin
decreases inflammation in the lymphatics and increases reabsorption of fat from the macrophages
What is the sequale to chylothorax?
Restrictive pleuritic
What would the pleural fluid look like with FIP?
High protein content with some macrophages in the fluid
What is the most common tumor affecting the pleural space?
Mesothelioma
What does Chronic inflammation result in?
hyperplastic changes to mesothelial cells
What is the most common etiology of pneumothorax?
Traumatic (blunt force trauma)
What is the cause of Non-traumatic/spontaneous closed pneumothorax?
Tumors abscesses pneumonia paragonimus chronic bronchitis asthma heartworm idiopathic bullae formation
What is the cause of traumatic open pneumothorax?
Gunshots
Bites
stab wounds
rib fractures
What is the cause of traumatic closed pneumothorax?
HBC
complication of lung aspirate
How do you diagnose pneumothorax?
Thoracocentesis
Imaging
What are the findings on a radiographs for pneumothorax?
Absence of pulmonary vasculature to chest wall
Dorsal displacement of the heart and trachea
Retraction of the lung from the chest wall
Increased density in collapse lobe
What is the treatment of pneumothorax?
Emergency thoracocentesis
Analgesia
Oxygen therapy
surgical intervention
What are the indications for chest tube or drain?
Pyothorax
Pneumothorax
Transudate
Transparent, low proteins and cells
Modified transudate
serosanguinous suggest an obstructive effusion: CHF, lung lobe torsion, neoplasia, diaphragmatic hernia
Exudate
red to brown to yellow to opaque
suggestive of inflammation, high proteins and cells
Septic exudate
pyothorax
Non-septic exudate
FIP Chylothorax Bilothorax neoplasia lung torsions