Poultry 2 Flashcards
What serotypes of salmonella enterica are host adapted in birds?
S pullorum
S gallinarum
Clinical signs of pullorum disease?
“Bacillary white diarrhea”
Often pasted around the vent, gray nodules in lungs, liver, gizzard, heart and intestines
What causes fowl typhoid?
Salmonella gallinarum
T/F: fowl typhoid has similar signs to pullorum disease
True
What salmonella causes paratyphoid?
S. Typhimurium
S. Enteritidis
S. Arizonae
What are signs of paratyphoid?
Dehydration, enteritis, focal necrosis of SI, unabsorbed yolk sac, omphalitis
Birds die acutely from septicemia
How is salmonellaenteritidis transmitted?
Trans-ovarian transmission to egg
What species of salmonella causes diarrhea, pasty vents, huddling, and eye infections in turkey poults less than 3 weeks of age?
Salmonella Arizonae
Transovarian transmission
What diseases can Ecoli cause in chickens?
Airsacculitis — caseous exudate Omphalitis Coli granuloma (Hjarre’s dz)
Enteritis, salpingitis, arthritis
Panopthalmitis - hypopyon in which one eye is blind
What is the most important enterotoxin of clostridium infections?
Type C
T/F: birds are highly resistant to tetanus
True
What causes flaccid paralysis is ducks?
Botulism “limberneck”
What causes an ulcerative enteritis in quail?
Clostridium colinum
What causes a necrotic enteritis in turkeys and chickens?
C perfringens
What causes a gangrenous dermatitis?
Multiple pathogens - clostridium and staph
Clinical signs of gangrenous dermatitis?
Swollen feet and legs
Wing tips and inner thighs red and sloughing
SQ emphysema
What does mycobacterium avium cause?
Avian tuberculosis
Emaciation, diarrhea, soiling of tail feathers, death
What would you see on necropsy of a bird with avian tuberculosis?
Tubercular granulomas of intestines, liver, spleen, and bone marrrow
How can you test live birds for tuberculosis?
Avian tuberculin into wattle
T/F: avian tuberculosis is zoonotic
True
Immunocompromised people
What species does mycobacterium genavense affect?
Duck
What is “duck plague”?
Highly contagious viral enteritis
Herpes virus of waterfowl
REPORTABLE
What pathology does duck viral enteritis cause?
Viremia —>. Vascular damage
Bloody diarrhea, bloody conjunctivitis, nasal discharge
Hemorrhage in all organs
What type of virus causes duck viral enteritis?
Herpes virus
What type of virus causes duck viral hepatitis?
Picornavirus (RNA)
T/F: duck viral hepatitis has high morbidity and high mortality
True
Clinical signs are ataxia, weakness, falling to side and kicking spasmodically, opisthotonos
What does erysipelas cause in turkeys?
“Red skin”
Sudden death, squatting, depressed, unsteady gait, swollen snood, erysipelas blush
ZOONOTIC
Birds were suffering from diarrhea, vent picking, and dehydration..
On necropsy you find a large edematous bursa..
What is this?
Infectious bursal disease
What type of virus causes infectious bursal disease?
Birnavirus
Can vaccinate
Recovered chicks are immunocompromised
What are the two neoplasic disease of chickens?
Marek’s disease: herpesvirus endemic in chicken flocks
Lymphoid leukosis complex: retrovirus leukosis/sarcoma
Lymphoid infilatraiton of nerve trucks and origins
Enlarged sciatic nerve
Lymphoid tumors in various organs
Partial paralysis, blindness and visceral tumors
Swollen joints
What disease is this?
Marek’s disease
Neurolymphatosis
What causes lymphoid leukosis in chickens?
Oncogenic retrovirus
Where are tumors located in lymphoid leukosis ??
Neoplasia of bursa and liver, metastasis to other organs — b lymphocyte tumros
Common problems of backyard flocks?
Poor nutrition Ectoparasites: lice and mites Foot trauma: pododermatitis Predators Foreign body ingestion Cancer and heart dz
