LECTURE 15: Respiratory Disease II Flashcards
Herpesvirus happens in what sector?
Chickens
Herpesvirus is a _________.
DNA enveloped
Herpes virus generally happens in what age ranges for chickens?
Older birds
What is the route of transmission for herpesvirus?
Horizontal transmission
What are clinical signs of herpes virus?
- Increased mortality
- Typically upper respiratory
- Open mouth breathing
- Head shaking
- Coughing blood
- Drop in egg production
What are gross lesions of herpes virus?
Severe Tracheitis
Tracheal plugs
What are differentials for herpes virus?
Wet Pox, ND, AI, MG, MS, Coryza
What samples do you take for ILT?
Trachea samples, PCR, serology, Histopathology
How do you prevent ILT?
Biosecurity and Vaccination (killed vaccines)
Fowl pox is what type of virus?
Large enveloped DNA
What are the 2 forms of pox?
- Dry form (skin lesions)
- Wet form (thick tissue membrane)
How is fowlpox transmitted?
Horizontal and mechanical (biting insects, mechanic vectors, aerosol)
What are clinical signs of fowlpox dry form?
- Dark brown to black scabs on the unfeathered skin
- Blindness due to eye lesions and may lead to starvation
- Decreased feed consumption/ egg productiom
What are the clinical signs of fowlpox wet form?
- Yellow to white raised plaques on the mouth and larynx
- Gasping
What is a method of diagnosis for fowl pox?
Histopathology
How do you prevent and control fowl pox?
- Vaccination (wing web vaccine)
- Biosecurity (flies a huge issue with this)
What is an infectious bronchitis?
Coronavirus
Infectious bronchitis is a _____ virus?
RNA enveloped virus
What are the 3 pathotypes of infectious bronchitis?
Respiratory
Reproduction
Renal
Infectious bronchitis is ____ only disease?
chicken
What is the transition mechanism for infectious bronchitis?
Horizontal and airborne
What are the clinical signs for respiratory infectious bronchitis?
Swollen head
What are the clinical signs for renal infectious bronchitis?
Diarrhea, nephrosis
What are the clinical signs for reproductive infectious bronchitis?
Egg quality and quantity
What samples would you take for infectious bronchitis?
- Blood (multiple sereotypes)
- Virus Isolation
What are means of intervention for infectious bronchitis?
- Immunity
- Live serotype specific
- Inactivated vaccines in breeder
What are the mycoplasmas affect turkeys?
- Mycoplasma Iowae
- Mycoplasma meleagridis
What are the mycoplasmas that affect chickens?
- Mycoplasma gallisepticum
- Mycoplasma synoviae
Mycoplasma ssp lacks….
lacks cell wall
What is the method of spread for mycoplasma spp?
VERTICAL but also horizontal
TRUE or FALSE? Mycoplasmas can affect all birds?
TRUE
Infected birds of mycoplasma will be….
Infected for life
What are clinical signs of MG and MS?
- Sinusitis/ arisacculitis
- Condemnations in the Plant
- Complicate respiratory viral vaccines
What is the classical triad of MG?
- Fibrinous pericarditis
- Fibrinous airsacculitis
- Fibrinous perihepatitis
What samples would you take for mycoplasmas?
- Serology
- Respiratory swabs
- PCR ***
- Next Gen Sequencing
- Low Isolation Rate
Why is it hard to culture mycoplasma?
REALLY HARD TO GROW