enzootic toxoplasmosis in sheep in north-central united states.of 1,564 serum samples from adult ewes from 33 farms in iowa, minnesota, south dakota, kansas, and nebraska where toxoplasmosis-induced ovine abortions had been diagnosed, 65.5% were found positive for toxoplasma gondii antibodies using the modified agglutination test. toxoplasma gondii antibody titers of ewes were: less than 64 (34.5%), 64 (14.9%), 256 (22.0%), 1,024 (14.5%), and greater than 4,096 (13.8%). thus, 28.3% of sheep had high titers (greater than 1,024) indicating recently acquired t ...19892795369
arbovirus encephalitis surveillance in iowa. 19704393690
enzootic nasal adenocarcinoma in sheep. 19676069985
lingual abscesses in suckling and weaned lambs.lingual abscesses were found in lambs from 2 midwestern flocks. lesions resulted in reluctance to feed, emaciation, and death. plant material was demonstrated at the center of abscesses in 1 flock. veterinarians should examine tongues carefully when investigating lamb mortalities.19846392266
epizootics of ovine abortion due to toxoplasma gondii in north central united states.toxoplasma-induced abortions were diagnosed in 14 flocks of sheep, 4 in minnesota, 2 in iowa, and 8 in south dakota, during the 1982-1983 lambing season. toxoplasma gondii was seen in histologic sections from 6 placentas and from brains of 2 lambs. toxoplasma antibody was found by dye test and agglutination test in thoracic fluid of 15 fetal lambs. lesions typical of toxoplasmosis were seen in fetal placentas from 26 ewes.19846725100
a case report of sporadic ovine listerial menigoencephalitis in iowa with an overview of livestock and human cases.a case of ovine listeriosis was examined in a flock of sheep. the index case was a male lamb, which was part of a flock of 85 sheep located in central iowa. because the sheep were raised on a premise where soybean sprouts were also cultivated for the organic foods market, the potential of a public health concern was addressed. to identify the source of contaminations, clinical and environmental samples were cultured for listeria monocytogenes. isolates were serotyped and analyzed using pulsed-fi ...200212152811
serologic survey of toxoplasmosis in iowa domestic animals. 196414114825
rabies surveillance in the united states during 2002.during 2002, 49 states and puerto rico reported 7,967 cases of rabies in nonhuman animals and 3 cases in human beings to the centers for disease control and prevention, an increase of 7.2% from the 7,436 cases in non-human animals and 1 case in a human being reported in 2001. more than 92% (7,375 cases) were in wild animals, whereas 7.4% (592) were in domestic species (compared with 93.3% in wild animals and 6.7% in domestic species in 2001). compared with cases reported in 2001, the numbers of ...200314690203
control of gastrointestinal nematodes with copper oxide wire particles in a flock of lactating polypay ewes and offspring in iowa, usa.copper oxide wire particles (cowp) have been used to reduce infection of haemonchus contortus in hair breed lambs in southeastern usa without signs of copper toxicity. however, copper sensitivity among breeds and regions varies. the objective was to determine the effectiveness and safety of cowp in lactating polypay ewes and their offspring grazing alfalfa/bluegrass pasture in a rotational grazing system. mature polypay ewes were administered 0, 0.5, 1, or 2 g (n=8 or 9/dose) cowp approximately ...200717433548
emergence of a tetracycline-resistant campylobacter jejuni clone associated with outbreaks of ovine abortion in the united states.campylobacter infection is one of the major causes of ovine abortions worldwide. historically, campylobacter fetus subsp. fetus was the major cause of campylobacter-associated abortion in sheep; however, campylobacter jejuni is increasingly associated with sheep abortions. we examined the species distribution, genotypes, and antimicrobial susceptibilities of abortion-associated campylobacter isolates obtained from multiple lambing seasons on different farms in iowa, idaho, south dakota, and cali ...200818322054
differential serologic response to mycoplasma ovipneumoniae and mycoplasma arginini in lambs affected with chronic respiratory enzyme-linked immunoabsorbent assay (elisa) was used to evaluate the levels of antibodies to mycoplasma ovipneumoniae and m. arginini in lambs with chronic respiratory disease. sera were obtained from lambs in several flocks at various stages of the clinical disease and tested with sodium dodecyl sulfate (sds)-treated m. ovipneumoniae and m. arginini whole cells and a crude capsular extract of m. ovipneumoniae as the antigens. there were low levels of antibody to m. ovipneumoniae in flocks sa ...19999925209
serotypes of pasteurella haemolytica in sheep in the midwestern united states.nasal secretions were collected from healthy lambs from flocks in iowa and the surrounding states for 2 consecutive years. the 1st year, 322 lambs from 61 flocks yielded 202 pasteurella haemolytica isolates, representing 9 established serotypes and 30 untypeable isolates. the 2nd year, 249 lambs from 49 flocks yielded 73 isolates, representing 9 established serotypes and 7 untypeable isolates. more isolates belonged to serotype 2 than to any other serotype. serotypes 3, 4, and 10 (members of bio ...19827181204
epidemiologic study of campylobacteriosis in iowa cattle and the possible role of unpasteurized milk as a vehicle of infection.bile samples were collected from 477 iowa dairy cows and were cultured for thermophilic campylobacters. the prevalence of thermophilic campylobacters in the bile was 15.5%. campylobacter jejuni and c coli from dairy cattle, chickens, pigs, sheep, and human beings were serotyped to develop host-species profiles. human and cattle serologic profiles were the most similar, and human and chicken profiles shared several similarities. epidemiologic data from 168 human cases of campylobacteriosis indica ...19863954200
detection of ruminal bacteria that degrade toxic dihydroxypyridine compounds produced from mimosine.leucaena leucocephala, a tropical leguminous shrub, contains a toxic amino acid, mimosine. successful utilization of leucaena as a ruminant forage depends on colonization of the rumen by bacteria that degrade dihydroxypyridines (dhp), which are toxic intermediates in the metabolism of mimosine. populations in the rumina of animals in some parts of the world, however, do not include bacteria that are able to carry out this degradation. we thus describe tests for the presence of dhp degraders in r ...19902317038
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