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swine

infectious disease

QuestionAnswer
swine pox clinical signs red papules appear in 4-5 days, develop into raised/hard elevations.hard crusts develop and drop off in 12-14 days. benign disease with slight fever and mild reaction.
swine pox transmissions swine louse (hematopinus suis)
swine pox control elimination of lice
pseudorabies control marker vaccine. prevent disease but not infection with field strains. reduce period and level of shedding of field virus.
marker vaccine vaccinated animals do not have AB to specific protein coded by a gene that is delteted from the genome of the vaccine. created by removing such a gene and attenuating the virus by removing the TK gene.
pseudorabies clinical signs: piglets less than 2 wks old very susceptible, indistinct syndrome, fever, convulsive episoldes, prostration. 100% mortality
pseudorabies clinical signs: piglets older than 2 wks old protracted course for up to 1wk. fever, anorexia, dev CNS signs, hindlimb incoordination. walk with sideways progression or circle fine to course muscle tremors. lateral deviation of head. respiratory signs
pseudorabies clinical signs: adults signs vary with strain of virus. mild: anorexia, dullness, constipation. abortion/mummification/stillbirths
pseudorabies clinical signs: adults, virulent strain spectrum of signs.fever, vomiting, respiratory, incoordination, paralysis
pseudorabies pathogenesis early replication in upper respiratory tract. short, poorly defined viremia. spread to brain w/ cranial nerves . viral excretion from nose and mouth for up to 17 days post infection.Latency!
Parvovirus clinical signs SMEDI. still birth, mummification, embryonic death, infertility. intrauterine infection.
Parvovirus transmitted any infected carrier swine. found in boar semen, testicles, feces.
Parvovirus vaccine available and effective. 3-4 wks prior to breeding
post weaning multisystemic wasting syndrome clinical signs complex and difficult to diagnose as so many different presentations can occur. affects young pigs. progressive wasting.
swine flu herd outbreak. sudden explosive onset. seasonal.
swine flu transmission pig to pig via nasal secretion and aerosol
swine flu necropsy secondary infections prevalent. bronchial mucus production, hperemia of pharygeal and laryngeal mucosae plum colored consolidation of anteroventral lung lobes. mild pleuritis and pericarditis. microscopic lesions
Transmissible gastroenteritis clinical findings explosive outbreak of diarrhea, vomiting, death in piglets less than 10d. begins in swine housed outside and spreads to farrowing house.
Transmissible gastroenteritis transmission carrier animals to piglets- upper respiratory tract and lungs. birds introduce.
Procine epidemic diarrhea clinical signs incubation as short as 22-36 hrs or 2-4days at the herd level. acute outbreak of severe diarrhea and vomiting (typically limited to suckling and recently weaned pigs).
porcine respiratory and reproductive syndrome (blue ear disease) clinical signs anorexia, fever, cyanosis.
blue ear disease clinical signs in young piglets preweaning mortality10-40%. survivors may have abdominal breathing, diarrhea.
blue ear disease clinical signs in grower and finisher pigs influenza-like illness, may be ill for up to 3 wks. mortality 1-5%
blue ear disease clinical signs in breeding sows premature farrowing 1-20%. farrowing w/dead, live, mummified fetuses. increased farrowing interval. retained placentae
blue ear disease clinical signs in older pigs mortalities are associated with pneumonia often complicated by secondary bacterial infection
blue ear disease transmission direct pig to pig. aerosol. chronic carriers.
blue ear disease vaccine modified live
Created by: ejohnson17
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