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Picornaviridae

Encephalomyocarditis

QuestionAnswer
Whoe are the natural hosts of this virus? Rodents
Who is this virus a significant pathogen in? ONLY in pigs [severe disease in young pigs]
Transmission Eating feed or drinking water contaminated with rodent urine and feces
Major site of viral replication Lymphatic tissues
What 3 places can high viremic titers be demonstrated? Myocardium, Spleen, and mesenteric lymph nodes
Disease is subclinical in who? Weaned pigs and adults
What are the clinical signs in very young pigs? SUDDEN DEATH! anorexia, depression, and difficulty breathing. Mortality approaches 100%. SMEDI
What is a good diagnositc tool? Pathognomonic cardiac lesions [myocardial infarcts, especially in the right ventricle]
What is a good control measure with this disease? RODENT CONTROL. Outbreaks usually run short courses with immunity occurring in suviving animals.
Created by: lkollmeier