an evolving pattern of human hydatid disease transmission in the united states.echinococcus granulosus infection was being acquired in the contiguous united states by virginia sharecroppers and small-holders by the turn of the century. the last recorded human infection from that general area was diagnosed in 1947. by 1920 human infections were also being acquired in the lower mississippi valley. apparently, infection in both of these areas was maintained chiefly in swine. by 1940 a third transmission area definitely existed in the central valley of california, with its res ...1977329700
comparison of anthelmintic control programs for sheep in virginia.haemonchus contortus is the most serious parasitic problem encountered by sheep producers in southwestern virginia. four anthelmintic control programs for grazing lambs were tested. group tr received monthly sc injections of ivermectin (200 micrograms/kg of body weight). group si received the same dose of ivermectin at 0, 3, 6, 9, and 12 weeks after the start of the grazing season. group sl was given levamisole (8 mg/kg, po) 0, 3, 6, 9, and 12 weeks after the start of the grazing season, and gro ...19921506250
association of group c beta-hemolytic streptococci with endemic pharyngitis among college students.throat cultures were performed throughout 2 school years to determine whether non-group a beta-hemolytic streptococci (nga bhs) could be isolated more frequently in 232 college students who had symptomatic pharyngitis than from 198 age-matched controls with noninfectious problems. duplicate throat swabs were inoculated onto plates that contained sheep blood agar, one plate being incubated in a 5% co2 atmosphere and the other in an anaerobic environment. the bhs were grouped using latex agglutina ...19902232040
listeria monocytogenes in nature.samples from 12 farms were examined during two successive spring and early autumn seasons. l. monocytogenes was isolated from vegetation or soil taken from 11 of the 12 farms and from 6 of the 7 nonagricultural sites. a total of 27 strains were isolated from the 19 sites. the organism was not isolated from any of the autumn collections.19714994904
genotype-environment interaction in sheep. i. ewe productivity. 19715122296
genetics of multiple births in sheep. 19695366319
host-feeding patterns of culicoides (diptera: ceratopogonidae) collected from livestock in virginia, usa. 19836644753
evaluation of brassicas in grazing systems for sheep: i. quality of forage and animal performance.four years of grazing trials were conducted with brassica forages to evaluate their chemical composition and effect on adg of fattening lambs and breeding ewes in late fall. brassicas tested included kales (brassica oleracea l. var. acephala dc), turnips (b. rapa l.), and a chinese cabbage hybrid (b. rapa l. x b. pekinensis [lour.] rupr.). daily gains of lambs varied widely among years (19 to 330 g/d); adg on brassicas were, however, generally higher than on stockpiled kentucky 31 tall fescue (f ...19947928762
managing replacement stock within the environment of the south--plant, soil, and animal interactions: a review.the south extends from the atlantic coast and the gulf of mexico north through virginia and kentucky and west to the 100th meridian, which extends through texas and oklahoma. the soils, environment, and range of adapted forage species offer many and varied opportunities for designing forage-livestock systems for rearing replacement stock. anti-quality factors of concern when using forages for replacement stock include the presence of acremonium coenophialum (morgan-jones and gams) in tall fescue ...19938270541
services provided by and veterinary education of small ruminant practitioners. 19968707671
detection of group a streptococci in children under 3 years of age with determine the frequency of group a streptococcal pharyngitis in young preschool children presenting to the emergency department with upper respiratory tract infection.199910532665
sporadic ovine vibriosis in virginia. 196414208767
rabies surveillance in the united states during 2003.during 2003, 49 states and puerto rico reported 7,170 cases of rabies in nonhuman animals and 3 cases in human beings to the cdc. this represents a 10% decrease from the 7,967 cases in nonhuman animals and 3 cases in human beings reported in 2002. more than 91 (n = 6,556) were in wild animals, and 8.6% (614) were in domestic species (compared with 92.5% in wild animals and 74% in domestic species in 2002). the relative contributions of the major groups of animals were as follows: 2,635 raccoons ...200415643834
detection of salmonella strains and escherichia coli o157:h7 in feces of small ruminants and their isolation with various media.salmonella strains and escherichia coli o157:h7 were detected in 17 and 5 small ruminants in virginia, respectively, of 287 tested. background microflora interfered with the fecal analysis. the combination of salmonella enzyme immunoassay (eia) detection and xylose-lysine-deoxycholate agar isolation was satisfactory. modifying enrichment to a 1:100 dilution enabled effective e. coli o157:h7 detection by eia and isolation by sorbitol-macconkey agar with cefixime-tellurite.200515812051
parasitism among white-tailed deer and domestic sheep on common range.parasitism was studied in white-tailed deer (odocoileus virginianus) and domestic sheep (ovis aries) which shared a common range in eastern west virginia. of 30 species of internal parasites, 11 were found in deer and 22 in sheep. five parasites, sarcocystis sp., cysticercus tenuicollis, oesophagostomum venulosum, cooperia punctata, and gongylonema pulchrum, occurred in both deer and sheep. an index of similarity of 17.2 suggests that the parasite faunas of these hosts are distinct, and that it ...197616498882
observations on besnoitiosis in virginia opossum (didelphis virginiana) from michigan, usa.besnoitia tissue cysts were found in five naturally-infected adult opossums (didelphis virginiana) from michigan. details of the microscopy, histopathology, ultra-structure, and genetic features of the cysts were studied to identify their species-specific traits. the materials were differentiated phenotypically from cysts of other besnoitia spp. by difference in size, pattern of tissue distribution, morphology of pellicle and nucleus, number of micronemes and rhoptries, amount of lipids and amyl ...200717580564
rabies surveillance in the united states during 2006.during 2006, 49 states and puerto rico reported 6,940 cases of rabies in animals and 3 cases in humans to the cdc, representing an 8.2% increase from the 6,417 cases in animals and 1 case in a human reported in 2005. approximately 92% of the cases were in wildlife, and 8% were in domestic animals. relative contributions by the major animal groups were as follows: 2,615 raccoons (37.7%), 1,692 bats (24.4%), 1,494 skunks (21.5%), 427 foxes (6.2%), 318 cats (4.6%), 82 cattle (1.2%), and 79 dogs (1. ...200717696853
high prevalence and abundant atypical genotypes of toxoplasma gondii isolated from lambs destined for human consumption in the usa.little information is available on the presence of viable toxoplasma gondii in tissues of lambs worldwide. the prevalence of t. gondii was determined in 383 lambs (<1 year old) from maryland, virginia and west virginia, usa. hearts of 383 lambs were obtained from a slaughter house on the day of killing. blood removed from each heart was tested for antibodies to t. gondii by using the modified agglutination test (mat). sera were first screened using 1:25, 1:50, 1: 100 and 1:200 dilutions, and hea ...200818191859
rabies surveillance in the united states during 2007.summary: during 2007, 49 states and puerto rico reported 7,258 cases of rabies in animals and 1 case in a human to the cdc, representing a 4.6% increase from the 6,940 cases in animals and 3 cases in humans reported in 2006. approximately 93% of the cases were in wildlife, and 7% were in domestic animals. relative contributions by the major animal groups were as follows: 2,659 raccoons (36.6%), 1,973 bats (27.2%), 1,478 skunks (20.4%), 489 foxes (6.7%), 274 cats (3.8%), 93 dogs (1.3%), and 57 ca ...200818795848
compromised immune competence in free-living tree swallows exposed to mercury.mercury is a pervasive environmental contaminant and a well-documented immunosuppressor. however, little is known about the effects of mercury contamination on health of free-living vertebrate populations. the south river in virginia, usa was heavily contaminated with industrial mercury from 1929 to 1950, and recent studies have documented high levels of circulating mercury in riparian songbirds breeding below the site of contamination. here we used two standardized immune assays, mitogen-induce ...200919322655
phalaris arundinacea (reed canarygrass) grass staggers in beef cattle.four adult mixed-breed beef cows from a cow-calf operation in west virginia were referred to the virginia-maryland regional college of veterinary medicine in march 2009 with weakness, ataxia, hind limb paresis progressing to lateral recumbency, and death within 2-3 days. histologically, there was accumulation of light brown, granular pigment in neurons of the ventral gray horns of the spinal cord (more severe in thoracic and lumbar sections), brain stem, and pons, resulting in distortion and bul ...201020807948
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