Gene/Protein Disease Symptom Drug Enzyme Compound
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Query: UMLS:C0027121 (myositis)
 4,538 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Pathological examinations of 28 wild-caught Mastomys natalensis from Sierra Leone, 14 of which were positive for Lassa virus by tissue culture, are reported. The high frequency of neoplastic and degenerative diseases observed among older animals in closed colonies of M. natalensis were not observed in the wild animals studied. This is probably a reflection of the age distribution of the study population, since the life expectancy of wild Mastomys is less than a year. Inflammatory lesions were nonetheless identified, some of which were similar to those described in laboratory colonies. Frequent lesions were myocarditis (54%), myositis (32%), interstitial pneumonitis (50%), intercapillary glomerulosclerosis (36%), and acute nephrosis (14%). Follicular and nodular lymphoid hyperplasia were evident in the spleen (74%) and Peyer's patches (64%). Lymphoid cell accumulations were prominent in the salivary glands (36%), periportal hepatic region (25%), lungs (32%), perivascular regions (36%), and kidney (21%). Cytomegalic inclusion body sialoadenitis was common (25%). Coccidiosis was evident in the intestinal tract (25%), kidney (25%), and muscle (21%). One neoplasm, a parahepatic haemangioma, was observed histologically.Mean body weights and lengths for virus-positive animals (33 g and 9.2 cm) and virus-negative animals (54 g and 12.2 cm) showed that virus-positive animals were smaller in weight and shorter in length. Since the age of the animals could not be determined, these differences remain unexplained.In comparison with virus-negative animals, virus-positive Mastomys had higher frequencies of splenic follicular hyperplasia (82% against 50%), myocarditis (79% against 29%), perivascular lymphoid cell accumulation (57% against 7%), myositis (50% against 14%), and cytomegalic inclusion body sialoadenitis (36% against 14%). The frequency of lymphoid hyperplasia of Peyer's patches was high in both groups of animals (71% and 57%).The presence of Lassa virus, small size, myocarditis, and lymphoid perivasculitis appeared to be interrelated, but larger and better controlled studies are required to elucidate the relationship.
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PMID:Lassa virus infection in Mastomys natalensis in Sierra Leone. Gross and microscopic findings in infected and uninfected animals. 108 21

Fifty, 2-3 month old dairy goats were each vaccinated orally with 10000 sporocysts of Sarcocystis capracanis and 25 age-matched goats served as uninoculated controls. Groups of vaccinated and control goats were challenged with lethal doses of S. capracanis at 95, 113, 205, and 274 days post-vaccination. Vaccinated goats developed subclinical sarcocystosis. Twenty-three vaccinated goats and 1 control goat died of intestinal coccidiosis and bacterial pneumonia, 15-118 days after vaccination. Myositis and degenerating sarcocysts were seen in muscles of goats necropsied at 90-186 days postvaccination. Very few, or no sarcocysts were seen in goats necropsied at 272 and 332 days post-vaccination. Vaccinated goats survived a lethal challenge inoculation indicating persistent protective immunity.
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PMID:Immunity to sarcocystosis: modification of intestinal coccidiosis, and disappearance of sarcocysts in dairy goats. 641 53