Avian Flashcards
(40 cards)
How do we diagnose Chlamydophila psittacci?
isolation and identification
What elevations do we see on bloodwork with Chlamydophila psittaci?
bile acids, AST, LDH and uric acid are elevated*
What do we see grossly with Chlamydophila psittacci?
REPORTABLE
- serofibrinous polyserositis (airsacculitis, pericarditis, perihepatitis, peritonitis)
- pneumonia
- hepatomegaly, splenomegaly
- multifocal necrosis on liver and spleen
- green or yellow diarrhea/urates, conjunctivitis
How do we diagnose avian encephalomyelitis?
- serology
- histopathology (pancreas, duodenum, brain)
What gross lesions do we see with avian encephalomyelitis ?
- pale foci in the gizzard
- birds recover and get cataracts
How do we diagnose and treat avian mycobacteriosis?
histopathology
CULL!!
What do we see grossly with avian mycobacteriosis?
-granulomas in intestinal tract
-
Erysipelas
gram positve pleomorphic rods
- diffuse darkening of skin
- enlarged friable livers and spleens
tx: IM sodium penicillin
Newcastle Disease
Gross lesions: petechiae in the proventricular mucosa
- clonic spasms, coughing, sneezing, complete paralysis, torticollis, circling, paralyzed ings and legs
- diarrhea, neurological issues
REPORTABLE
infectious coryza
CHICKENS ONLY
acute resp disease with nasal discharge, sneezing, and SWELLING UNDER THE EYES, rales
Avibacterium paragallinarum
tx: erythromycin and oxytet in water
fowl cholera
Pasteurella multocida
- swollen footpads; fibrinosuppurative exudate
- hyperemia of duodenum on necropsy
- pneumonia in turkeys
Tx: sulfamethazine or sulfadimethoxine in feed or water; VACCINATE
Infectious bursal disease (gumboro)
CS: depression, watery diarrhea, ruffled feathers, deH20
- yellowish transudate in bursa and atrophy
- soiled vent feathers
Dx: RT-PCR, virus isolation
-no treatment
Giardiasis
CS: feather pulling, feces look like popcorn
Dx: zinc sulfate flotation test
what is another name for highly pathogenic avian influenza (HPAI)?
fowl plague
REPORTABLE
ZOONOTIC
What do we see with HPAI?
upper resp signs:
- cyanotic and edematous combs
- sinusitis, conjunctivitis
- dyspnea
neuro signs:
- droopy wings
- torticollis, paralysis, opisthotonus
How do you diagnose avian influenza?
Necropsy: edema and necrosis of visceral organs, skin, and CNS
REPORT OUTBREAK TO STATE VET
AGID and ELISA
- if + then virus isolation
Treating LPAI vs HPAI
LPAI: supportive care; broad spectrum abx (good px)
HPAI: cull infected flock (H5 and H7) (grave px)
What do we see with infectious bronchitis virus? 3Rs
ONLY IN CHICKENS
- respiratory: gasping, tracheal rales, epiphora, swollen sinuses, coughing, sneezing
- renal: ADULTS
- reproductive: dec egg production, wrinkled and abnormal eggs; egg yolk peritonitis 2 to ruptured follicles
Diagnosing infectious bronchitis virus
CORONAVIRUS
Necropsy: non hemorrhagic serous catarrhal or yellow caseous exudate
virus isolation: - hemagglutination reaction (AI and Newcastle are +)
serotype ID: RT-PCR
What do we see in chickens with infectious bronchitis virus with a secondary bacterial infection?
- airsacculitis: cloudy thickened caseous yellow exudate
- pericarditis
- perihepatitis
What is the most important vector for infectious bronchitis virus?
clinically recovered asymptomatic (carrier) birds
What are four reasons that infectious bronchitis virus is so difficult to control?
- multiple serotypes
- no cross reaction
- multiple serotypes in the same region
- highly contagious
Infectious Laryngotracheitis
REPORTABLE; herpesvirus
CS: coughing, dec egg production, conjunctivitis, periorbital swelling
Dx: PCR; AGID, ELISA; VACCINATE
3 systems for viscerotropic velogenic ND
- respiratory
- gasping, sneezing, facial edema - neurologic
- muscle tremors, droopy wings, torticollis, paralysis, circling - digestive
- violent watery green dx, ruffled feathers, thin eggs wih watery albumen (dec egg laying)
**hemorrhage and necrosis of lymphoid organs on necropsy
