Small Ruminant- Chronic Wasting Disease Flashcards
what are problems with chronic wasting syndrome?
decreased quality of life
shortened lifespan
decreased production
decreased economic potential
what causes ovine progressive pneumonia and caprine arthritis encephalitis?
small ruminant lentiviruses
when does the arthritic form of ovine progressive pneumonia and caprine arthritis encephalitis set in?
1-2 years old
which form of ovine progressive pneumonia and caprine arthritis encephalitis can we manage?
arthritic form
what does the mastitic form of ovine progressive pneumonia and caprine arthritis encephalitis look like?
firm udder that appears full, no systemic or classic of mastitis
what is the ELISA test for ovine progressive pneumonia and caprine arthritis encephalitis?
small ruminant lentivirus antibody test
what causes johne’s disease?
Mycobacterium avium subsp paratuberculosis
how does johne’s enter the body?
via ileum
what causes caseous lymphadenitis?
Corynebacterium pseudotuberculosis
what is the incubation period of caseous lymphadenitis?
3 weeks-6 months
what is the definitive way to diagnose caseous lymphadenitis?
bacterial culture
when is coccidiosis usually a clinical problem?
in young
1-6 months old, most clinical disease at 4-8 weeks
what are subacute clinical signs of coccidiosis?
poor growth
weight loss
what is a major risk factor of coccidiosis?
stress: weaning
what lentivirus disease is that of goats and which one is that of sheep?
caprine arthritis encephalitis virus: goats
ovine progressive pneumonia virus: sheep
what percentage of animals with caprine arthritis encephalitis virus and ovine progressive pneumonia virus develop clinical signs?
20% goats
25-30% sheep
what is the encephalitic form of caprine arthritis encephalitis virus and ovine progressive pneumonia virus like?
very rare
ascending paresis leading to paralysis
what is the most common manifestation of caprine arthritis encephalitis virus and ovine progressive pneumonia virus in sheep?
pneumonic form
how can you diagnose caprine arthritis encephalitis virus and ovine progressive pneumonia virus?
ELISA
AGID
tissue PCR
how is johne’s disease transmitted?
fecal oral
advanced: transplacental, milk/colostrum
is diarrhea with johne’s in small ruminants common?
not as much as in cattle
why is testing of johne’s difficult?
all options have a downside
how hardy is Corynebacterium pseudotuberculosis?
very hardy, can survive months to years in environment
how is caseous lymphadenitis spread iatrogenically?
shearing
tagging
what are the most common lymph nodes affected by caseous lymphadenopathy?
parotid
submandibular
supramammary
is true resolution of caseous lymphadenitis possible?
no
what is the vaccine like for caseous lymphadenitis?
sheep only
vaccinate infected flocks
