Exam #3 Flashcards
Common cold 2 main causes
#1 Rhinovirus #2 Influenza virus
rhinitis medicamentosa can occur when?
Decongestant should only be used for short term use bc can develop rhinitis medicamentosa (rebound congestion)
Pharyngitis main viral causes
1 Adenovirus: can cause exudate like GAS (most common)
#2 Rhinovirus
#3 Coronaviruses
EBV
Coxsackie (hand foot and mouth / herpangina)
Pharyngitis main bacterial causes
GAS Group C and G Neisseria Fusobacterium Diphtheriae Arcanobacterium haemolyticum
How to tell the difference btw GAS and Arcanobacterium haemolyticum caused pharyngitis
Arcanobacterium haemolyticum: extremities -> trunk and spares palms/soles
GAS: head/neck -> trunk
Trismus
can’t open mouth
Dental Caries cause
strep mutans
Acute Ulcerative Gingivitis cause
Fusobacterium
Ludwig’s angina
cellulitis and abscesses on floor of mouth (leads to tongue elevation -> see under tongue when opens mouth)
-often descend down ant chest wall
Sulfur granules are associate w
actinomycetes
Cervicofacial actinomycosis
usually starts from other odontogenici infects (caused by actinomyces that form sulfur granules)
Angular cheilitis common cause
Candida
Candida stomatitis found in what patients
diabetics or immunocompromised
most common cause of oral squamous cell carcinoma
HPV subtype 16
Parotitis 2 cause and difference
Mumps Virus
Staph aureus: more acute and seen in a hospital setting in an elderly or debilitated patient who is mouth breathing
duct drain submandibular and sublingual salivary glands under tongue
Wharton duct
parotid gland duct
Stensen’s duct
Sinusitis bacterial causes
Strep pneumonia (most common)
Haemophilus influenzae
Moraxella catarrhalis
Sinusitis fungi cause, common symptoms, and common patient
Mucormycosis
- black necrotizing lesion on face
- diabetics
Sinusitis symptoms
Facial pain that inc w bends forward or lies down
Cavernous sinus thrombosis definition
occur from a spread of infection in the highly anastomotic venous system retrograde to the base of the skull (usually ethmoid or sphenoid sinusitis)
Cavernous sinus thrombosis symptoms
loss of vision, photophobia, eye bulging
Otitis Media causes
Strep pneumoniae (most common)
Haemophilus influenza
Moraxella catarrhalis
Bullous myringitis
blistering of tympanic membrane
otitis externa in diabetics cause
pseudomonas
Erysipelas vs cellulitis
Cellulitis: defused borders
Erysipelas: bright read and sharp borders
sinusitis and Facial Cellulits can lead to …. which can cause lateral gaze palsy
cavernous sinus thrombosis
-CN VI
Facial Cellulits cause pre-vaccine era
Haemophilus influenzae
Thumbprint Xray
epiglotitis
Epiglottitis causes
Strep pneumoniae
Haemophilus influenzae
Steeple Sign on Xray
Croup (laryngotracheobronchitis)
Croup cause
Parainfluenza virus
Lemierre’s Syndrome cause and symptoms
Fusobacterium necrophorum
Symptoms: soar throat followed by unilateral neck swelling
Cobble stone pattern on Xray
Infectious Esophagitis caused by Candida
Infectious Esophagitis causes
Candida (most common)
HSV (will show multinucleate cells)
CMV (will show owl’s eyes)
Infectious Cervical Lymphadenitis causes
Usually Strep or Staph
Bartonella henselae (Cat Scratch Disease)
Francisella tularensis (Tularemia)
** EBV, CMV, HIV, Toxoplasma, Rubella (posterior cervical)
Infectious Conjunctivitis cause
Adenovirus (most common)
Trachoma (Chlamydia trchomatis) seen in neonatal via delivery
Infectious Keratitis bacterial causes
Staph aureus
Pseudomonas aeruginosa: via contacts
Infectious Keratitis viral causes and THIER ASSOCIATION
Adenovirus: leads to subcorneal infiltrate
HSV: causes dendritic pattern
Diphtheria symptoms and associations
Barking cough
Bull neck
Pseudomembrane in nose or on tonsils
**peripheral neuropathy
Diphtheria agar
Blood agar
Loeffler’s agar
Atelectasis trachea will deviate
towards side of atelectasis
Bronchiectasis causes
Cystic Fibrosis
Karagener Syndrome (Dyskinetic Cilia Syndrome)
Aspergillosis
Foreign body aspiration
signet ring sign on X-ray
Bronchiectasis
Bronchiectasis bacterial colonization
Haemophilus influenzae
Pseudomonas aeruginosa
Tree in bud pattern on xray
Bronchiectasis
Kartagener Syndrome symptoms
Infertility (sperm flagella doesn’t work)
Bronchiectasis
Chronic Rhinossinusitis
Situs Inversus w Dextrocardia
Aspiration pneumonia locations
sup segment of RLL
post segment of RUL
pneumonia phases
- Pulmonary capillary congestion
- Red hepatization (neutrophils and RBCs)
- Gray hepatization (neutrophils and fibrin)
- Resolution/consolidation (macrophage clear debri)
pneumonia clinical findings
Egophony (E to A changes) Bronchophony (vocal fremitus by saying 99) Percussion dullness Rales Pleural friction rub
Community Acquired Pneumonia Strep pneumoniae symptoms
Rusty sputum
Elevated bilirubin and transaminases
Pneumonia in COPD patients is caused by
Haemphilus influenza
Moraxella catarrhalis
Legionella
Community Acquired Pneumonia Staph aureus is see in
patients following influenza infection, IV drug users, and cystic fibrosis
Cystic Fibrosis Pneumonia is caused by
Staph a
Pseudomonas
Burkholderia
Haemophilus influenzae is a
gram neg coccibacillus
Moraxella catarrhalis is a
gram neg coccibacillus
bulging fissure sign on xray
Klebsiella
Klebsiella is a
gram negative rods
Mycoplasma pneumoniae pneumonia is seen in
Adolescents and young adults living close quarters (college/military)
Chlamydophila pneumoniae pneumonia is associated w
Illness commonly associated with asthmatic bronchitis (bronchospasms) and wheezing
Legionella pneumophilia symptoms
Faget’s sign
hyponatremia
Legionella pneumophilia agar
Buffered Charcoal Yeast Extract agar
Tularemia is associated w and is seen in
significant Hilar Lymphadenopathy
placenta of birthing animals
Q fever (Coxiella brunetii)
biological warfare
Tularemia
Viral atypical pneumonias causes
- children
- adults
- COPD
- children: Respiratory Syncytial Virus
- adults: Influenza virus
- COPD: Metapneumovirus
Severe Acute Respiratory Syndrome (SARS) arises where
China
Post-Influenza Bacterial Pneumonia are caused by
- Strep pneumoniae
- Staph a
- Haemophilus influenzae
- GAS
Associated w infected pet birds
Chlamydophila psittaci
Inc Procalcitonin
bacterial pneumonia
Pneumonia Treatment
- Healthy Person: Macrolide
- Chronic Disease/Immunosuppressive Patient: Quinolone
- Inpatient (non ICU setting): quinolone vs ceftriaxone/macrolide vs ceftriaxone/doxycycline
MIC >2 means
penicillin resistant
Bordetella pertussis agars
Bordet-Gengou agar
Regan-Lowe Charcoal Blood agar
Bordetella pertussis (“Whooping Cough”) symptoms
- Prolonged cough
- Paroxysmal staccato cough w inspiratory whoop
- Tracheitis on bronchoscopy
- Subconjunctival Hemorrhage
Bordetella pertussis (“Whooping Cough”) symptoms
- Prolonged cough
- Paroxysmal staccato cough w inspiratory whoop
- Tracheitis on bronchoscopy
- Subconjunctival Hemorrhage
Staph and strep agar
blood agar
Haemophilus agar
chocolate agar
Klebsiella agar
MacConkey agar
Pseudomonas agar
MacConkey agar
Mycobacteria agar
Lowestein-Jensen agar
Bordetella agar
Bordet-gengon
Regan-Lowe Charcoal blood agar
Pleural infection signs
Low pH
Low glucose
Inc LDH
Gohn and Ranke complexes are formed why?
Tb causes hypercalcemia leading to Ca2+ lesions
Milirary Tb definition
Tb disseminated into the blood stream
Tb skin test results
Healthy
High Risk Ind
Recent contact
Healthy: >15mm
High Risk Ind: >10mm
Recent contact: >5mm
PZA resistant Tb
M. kansasii
Actinomycosis often accompanied by
Aggregatibacter
Actinomycosis pathology
colonized in the oral cavity in nearly all people, pathogenesis begins w the disruption of a mucosal barrier via surgery, trauma, malignancy, or radiation therapy
Nocardia stain
Ziehl-Neelsen
Kinyoun AFB
**Actinomyces does not show up on
Actinomyces histo and gram stain
-AFB
45 degree branching and bush like commonly on gram stain
- gram +
- AFB -
Nocardia histo and gram stain
-AFB
90 degree branching that resemble beading appearanc on a gram stain
- gram +
- AFB +
Histo causes (location)
caves/bridge workers where birds
Histo plasma stains
Wright stain
Silver stain
Urine Antigen test
legionella
histo
coccidioides
Histo associations
- Erythema nodosum
- Oropharyngeal and GI ulcers in immunocomp patients
Blasto histo
broad based budding
blasto association
bone (osteomyelitis)
skin lesions
Coccidioides histo
spherule
thin walled cavities
Coccidioides
CNS related pneumonias
nocardia
coccidiodes
cryptococcus
Cryptococcosis histo
Narrow based budding yeast
Cryptococcosis stain
Mucicarmine stain
if histo is found in GI think
AIDs
penicilliosis/talaromycosis
sausage form
Immunocompromised (AIDs) patients in SE Asian think
penicilliosis/talaromycosis
Paracoccidioidomycosis histo
Multiply budding yeast
Paracoccidioidomycosis associated lesions
Mullberry
HALO sign on Xray
aspergillosis fungus balls
aspergillosis stain
silver stain
aspergillosis histo
septate 45 degree
Mucomycosis (Zygomycosis) histo
non septate 90 degree
Pneumocystis pnuemonia stain
Gomori-Methomine Silver stain (sputum)
Pneumocystis pnuemonia histo
Resembles tea cups or crushed ping-pong balls
Pneumocystis pnuemonia compilations associtiaon
Spontaneous Pneumothorax
1,3 Beta-D-Glucan test for what and except what
Tests for fungal infections
- Zygomycets (mucor)
- Blasto
- Cryptococcus
Galactomannan test mainly for
aspergillus
Lung parasites
- ascaris
- ancyclostoma duodenal/americanus
- strongyloidiasis
Lung parasitic infiltration will have
Eosinophils in sputum w Charcot-Leygen crystals
Larvae in sputum
Loeffler Syndrome
lung issues caused by pulmonary parasites
Paragonimiasis is found where in the world
- Eastern Asia and South America
- Diagnosis: eggs in sputum and hemoptysis
Paragonimiasis diagnosis by
eggs in sputum
hemoptysis
Strongyloidiasis histo
spiral worm
M. canettii vs M. africanum
M. canettii: East africa
M. africanum: West africa
M. bovis is acquired by
cattle/bison/deer/elk and is spread to humans via unpasteurized milk and animal contact via handling, meat or milk (once common in humans, now uncommon, 2% of US cases)
smoking toxic chemicals
- Polycyclic Hydrocarbons
- Nicotine
- Arsenic
lung cancer activation mutations
KRAS EGFR cMET cMYC VEGF
Lung cancer inactivation mutations
p16
RASSF1A
p53
Rb
Central cancer growth can be
Squamous cell
Small cell
Squamous cell carcinoma is described histologically how?
Intercellular bridges
Keratinizing patterns
Chromogranin + lung cancers
Small cell
Carcinoid cancer
Small cell cell association
Kulchisky cells
Peripheral lung cancer
Adenocarcinoma
Adenocarcinoma cells express
TTF-1
Napsin A
Acinar scarring condition from adenocarcinoma is is appear how histologically?
Cavities that are lined w columnar cells
Carcinoid Tumor of the Lungs how described how histologically
- Delicate stromal septa that looks like nuclei are creating a fence between it and the rest of the tumor
- Palisading
Carcinoid Syndrome symptoms
Diarrhea
Flushing
Cyanosis
Lung Hamartoma
- nodules of connective tissue
- intersected with epithelial cleft (lined w ciliated/unciliated cleft)
Mutation in TSC2 tumor supressor gene
Lymphangioleiomyomatosis
rearrangement of ALK gene
Inflammatory Myofibroblastic Tumor
Pleural Tumors
- expression
- cryptic inversion of chromosome 12
Expression: CD34+ and keratin negative
Association: cryptic inversion of chromosome 12
Malignant Mesothelioma
-expression
- Asbestos exposure
- Deletion of tumor suppressor CDKN2A/INK4a
Pancaost Tumor can cause
- Horner Syndrome
- Miosis, ptosis, anhidrosis (no sweating), enothalmost (sunken eyeball)
Uncomplicated Cystitis symptoms
-does this require a urine analysis?
- Dysuria (pain during urination)
- Increase frequency
- NO VAGINAL DISCHARGE
-No, bc positive dipstick alone has 90% sensitivity
Complicated Cystitis includes
females w comorbid medical conditions, ALL males, patients w catheters or who are hospitalized
Pyelonephritis symptoms
All symptoms that apply to cystitis plus
- Fever
- Flank/back pain
- Abdominal pain
- Naseau, vomiting
**these patients appear very ill while cystitis patients are more or less irritated/uncomfortable
WBC/Grandular cast suggest
pyelonephritis
Prostatitis symptoms
- Pain (perineum, lower abdomen, testicles, penis, and with ejaculation)
- Bladder obstruction leading to dribbling
- Potentially blood in semen
- Inc PSA
what do you not want to do w an acute prostatitis patient?
DRE, could lead to sepsis due to aggravation
Epididymitis symptoms
- Acute onset of testicular pain
- History of urinary frequency, dysuria, and fever
- Scrotal erythema, edema, nodule
Sepsis qSOFA
Infection proven/suspected + 2 of the following
- Altered mental status
- Resp Rate > 22 breathes/min
- Systolic BP <100 mmHg
Septic Shock qSOFA
- vasopressors fail to maintain or are need to maintain MAP > 65 mmHg
- Blood Lactate Acid > 2 mmol/L
Most sensitive UTI test
Leukocyte esterase
Most specific UTI test
Nitrite
+ Nitrite on urine test means
gram negative bacteria
-rules out staph sap
pH 8-9 on urine test
proteus
Colonization is described as
patients who are negative for leukocyte esterase and nitrite, no symptoms, but have >100,000 cfu/mL bacteria
Want to treat pregnant women who are colonized why?
because they are at a 30% higher risk for a UTI
top 2 causes of community-acquired UTIs
- E. coli (80% of cases)
2. Staph saprophyticus
Coagulase Neg Staphs and novobiocin test
- Staph saprophyticus (novobioicin resistant)
- Staph epidermidis (novobiocin sensitive)
Proteus UTI results in
- Staghorn” kidney stone
- Converts urea to ammonia
- Urine of pH 8-9 diagnosis
- Swarming/bullseye on blood agar
Hematuria causing Trematode and where it is commonly found
Schistosoma haematobium
-Commonly presents in young boys in Ghana (boy period)
Enterococcus spp can be identified by
Catalase neg
Gamma hemolysis
Grows on 6.5% NaCl media
Ferment: Positive (fast) bacteria
Escherichia coli
Klebsiella ssp
Pseudomonas aeruginosa
- ferment
- oxidase
Ferment: Negative
Oxidase: Positive
Proteus ssp
- ferment
- oxidase
- pH
Ferment: Negative
Oxidase: Negative
pH: 8-9
Men <35 years old cause of prostatitis and epididymitis
STI
Ureaplasma, Chlamydia, Neisseria
Men >35 years old cause of prostatitis and epididymitis
BPH (benign prostate hyperplasia)
Urine leukocytes appear in
cystitis and pyelonephritis
calcium oxalate crystals observed in urine analysis and metabolic acidosis suspect
Etholene Glycol (anitfreeze) consumption
Pyuria definition
urine containing WBCs
amount of WBCs/high powered field suggests UTI
10
Children infected w respiratory … can present with hematuria
adenovirus
Sterile Pyuria suggests
Most likely indicates STI (Chlamydia trachomatis & Neisseria Gonorrhea)
Whiff Test
- Strong Positive
- Negative
- Positive
- Strong Positive: Gardnerella vaginosis
- Negative: vulvovaginal candidiasis
- Positive: Trichomonas vaginalis
Strawberry cervix
Trichomonas vaginalis
swim across urine microscopy
Trichomonas vaginalis
Clue cells - glitter epithelial cells covered in bacteria
Gardnerella vaginosis
Nephrotic symptoms
- Heavy, selective proteinuria (> 3 g/day)
- Hypoalbuminemia
- Edema (less plasma colloid pressure, salt and water retention)
- Hyperlipidemia
- Hypercoagulability (loss of AT-III in urine)
Nephritic symptoms
- Hematuria (cells, Hb or blood casts)
- Mild, non-selective proteinuria (< 3g/day)
- Hypertension (generally mild)
Immune complex deposition immunofluorescent
granular deposition
Anti-neutrophil cytoplasmic antibodies (ANCA)
P-ANCA
C-ANCA
P-ANCA: Churg-Strauss Syndrome
C-ANCA: Wegenger’s Granulomatosis
Anti-endothelial cell antibodies (EACA) result in
EACA increase the adhesiveness of leucocytes to the endothelial cells
Cell-mediated glomerular injury is characterized by
immunoglobulin-deficient GN
IgA nephropathy (Berger disease)
- IgA deposits in mesangium leading to mesangial cell proliferation
- Most common type of glomerulonephritis worldwide
IgA nephropathy often is associated with
frequent mucosal/celiac infections/diseases
Alport syndrome
X linked collagen type IV defect leading to splitting of glomerular BM
Thin basement membrane lesion
- GBM widths 150-225 nm
- Mild-moderate proteinuria
- most common cause ofbenign familial hematuria
Diffuse cortical necrosis often occurs
- after obstetric emergency like abruptio placentae
- septic shock
- extensive surgery