Publications

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prevalence of ibr-bvd-pi3 infections. 1975167273
cross-reactions of normal bovine serums to foot-and-mouth disease virus in plaque-reduction neutralization and radial immunodiffusion.serums from 150 cattle with no known exposure to foot-and-mouth disease (fmd) virus were tested by both the plaque-reduction neutralization (prn) technique and the radial immunodiffusion (rid) technique to evaluate the significance and the extent of cross-reactions in these tests. serums from 30 cattle from each of 5 locations were tested against representative viruses of each of the 7 types of fmd virus. high levels of cross-reactions with both the rid and prn techniques were found in serums of ...1975167625
seroepidemiologic studies on the possible relationships of human and bovine leukemia: brief communication.a seroepidemiologic study was conducted in an attempt to identify antibodies against the bovine leukemia virus (blv) in people exposed to cattle with lymphosarcoma. farm families, farm employees, and veterinarians in contact with cow herds having documented cases of lymphosarcoma were tested for precipitating antibodies to the blv with the agar gel immunodiffusion test. the cattle also were tested serologically. information was collected form the farm families regarding consumption of unpasteuri ...1977197245
infectious thromboembolic meningoencephalitis (teme) in an iowa feedlot. 1978252362
isolation and identification of mycoplasma agalactiae subsp. bovis from arthritic cattle in iowa and nebraska.two strains of mycoplasma were isolated from synovial fluids of arthritic feeder cattle and were identified as mycoplasma agalactiae subsp. bovis by growth inhibition and fluorescent antibody tests. the strains (iowa 1136 and nebraska 2) could not be distinguished from known strains (donetta and california 01) by immunoelectrophoresis or by agar gel precipitation.19751176624
rabies surveillance in the united states during 1991.in 1991, 49 states, the district of columbia, and puerto rico reported 6,972 cases of rabies in nonhuman animals and 3 cases in human beings to the centers for disease control. ninety-one percent (6,354 cases) were wild animals, whereas 8.9% (618 cases) were domestic species. the total number of reported cases of rabies increased 42.9% over that of 1990 (4,881 cases), with most of the increase resulting from continued spread of the epizootic of rabies in raccoons in the mid-atlantic and northeas ...19921483899
national genetic improvement programs for dairy cattle in the united states.rate of genetic improvement for milk yield has been increasing in recent years. cows born in 1986 were about 135 kg superior in breeding value for milk yield to those born in 1985. over 2.2 million cows contribute new data to genetic evaluations for production traits annually. these evaluations are computed with an animal model that provides best linear unbiased predictions of transmitting abilities for milk, fat, and protein yields and fat and protein percentages. the model includes effects of ...19911938664
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
comparative studies on three isolates of breda virus of calves.three isolates of breda virus of calves were compared morphologically and antigenically. the isolates demonstrated similar morphology and shared common antigens, as determined by enzyme-linked immunosorbent assay and immunoelectron microscopy. on the basis of results of the hemagglutination-inhibition test, enzyme-linked immunosorbent assay, and immunoelectron microscopy, the 3 isolates were further subdivided into 2 serotypes: serotype 1 (breda virus 1) represented by the iowa isolate 1; and se ...19852408519
control of johne's disease in four commercial dairy herds in iowa.a 6-year study was conducted in 4 dairy herds in iowa in which johne's disease was diagnosed previously. fecal specimens were collected at 6-month intervals from animals 2 years of age and over for mycobacteriologic examination. serum samples were obtained at 3-month intervals and tested by enzyme-linked immunosorbent assay (elisa). the antigen used in the elisa was a potassium chloride extract of a field strain of mycobacterium paratuberculosis. the elisa reactions were observed in 87% of the c ...19892488348
infectious bovine keratoconjunctivitis epizootic associated with area-wide emergence of a new moraxella bovis pilus type.pilus-mediated adherence is a virulence attribute of moraxella bovis. several pilus types have been shown to exist among strains of this bacterium, but correlation between pilus type and specific field cases of the disease has not been done. during the summer of 1987, an epizootic of infectious bovine keratoconjunctivitis was reported in 7 iowa counties. eight isolates of m bovis were secured from 12 episodes studied. all 8 of the isolates were nearly homogeneous in biochemical properties and ha ...19892572190
relationships of bovine leukemia virus prevalence in dairy herds and density of dairy cattle to human lymphocytic leukemia.a case-control study was conducted to examine possible relationships between human acute lymphoid leukemia and exposure to dairy cattle and drinking of raw milk. two hundred twenty-three persons with acute lymphoid leukemia, diagnosed during the years 1969 to 1971 and 1973 to 1980 from the 87 most rural iowa counties, were accessed from case records at the iowa state health registry for participation in the present study. each person and 2 matched controls were interviewed for history of residen ...19873030166
an outbreak of thyrotoxicosis caused by the consumption of bovine thyroid gland in ground beef.we report an outbreak of thyrotoxicosis without true hyperthyroidism that occurred between april 1984 and august 1985 among residents of southwestern minnesota and adjacent areas of south dakota and iowa. one hundred twenty-one cases were identified through surveillance of medical clinics, laboratories, hospitals, and physicians' offices. investigation of the outbreak demonstrated an association between the occurrence of thyrotoxicosis and the consumption of ground beef prepared from neck trimmi ...19873561455
phenology of horn fly populations (diptera: muscidae) in iowa, usa. 19863701803
isolation of leptospires from the genital tracts of iowa cows.leptospira interrogans serovar hardjo was recovered from 5 of 11 nonpregnant cows chosen at random from an iowa slaughterhouse. isolations were made from the kidney in each instance, the genital tract of 3 cows: uterus from 1 cow, oviduct of another, and oviduct and uterus of a 3rd cow.19863752677
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
bovine thelaziasis in iowa.the prevalence of developing thelazia nematodes in face flies (musca autumnalis) was studied for 7 yr at a beef farm in central iowa. juvenile nematodes were not found among flies in reproductive diapause in autumn, nor among nulliparous, overwintered flies in spring, but only among actively reproducing insects. thus thelazia probably do not overwinter in face flies. a mean prevalence of 2.0% infected was recorded among flies in 7 fly breeding seasons. no heterogeneity in thelazia prevalence was ...19854040164
residues of mirex and certain other chlorinated hydrocarbon insecticides in beef fat--1971. 19734205627
brucellosis in the united states, 1960-1972. an abattoir-associated disease. part i. clinical features and therapy. 19744215937
arbovirus encephalitis surveillance in iowa. 19704393690
brucellosis in the united states, 1960-1972. an abattoir-associated disease. part ii. diagnostic aspects. 19744612293
brucellosis in the united states, 1960-1972; an abattoir-associated disease. part iii. epidemiology and evidence for acquired immunity. 19744612294
epidemiology of lead poisoning in cattle--a five-year study in iowa. 19734757380
toxoplasmosis review and assessment. 19684896153
epidemiologic studies of leptospira grippotyphosa and leptospira hardjo infections in iowa cattle. 19675257309
diseases in cattle in contact with swine under feedlot conditions. i. pseudorabies and ulceration of the muzzle and perineum. 19675257333
diseases in cattle in contact with swine under feedlot conditions. ii. case studies on a glossitis-respiratory complex. 19675257334
enthusiasm generates prosperity in iowa. 19705462995
identification and characterization of a bovine rhinovirus isolated from iowa cattle with acute respiratory tract disease.viral isolate fs1-43 isolated from a calf with acute respiratory tract disease was characterized as a bovine rhinovirus. this virus was antigenically indistinguishable from rhinovirus strains c-07 and vc-96. the virus replicated in low passage madin-darby and georgia bovine kidney cells. a relative noncytopathogenic replication occurred in epithelial bovine turbinate, bovine fibroblastic turbinate, and bovine lung cells. ciliary activity of tracheal explants was unaffected during eight serial pa ...19806254404
selected cancer mortality and farm practices in iowa.death certificate analyses of white male iowans over age 30 who died of multiple myeloma, non-hodgkin's lymphoma, prostate cancer or stomach cancer between 1964 and 1978 were completed. each case was matched to two controls on age (within two years) at death, county of residence, and year of death. consideration of usual occupation, as recorded on the death certificate, resulted in the following odds ratios for mortality due to the specified cancers among farmers: multiple myeloma, 1.48; non-hod ...19836869365
epidemiologic relationships of the bovine population and human leukemia in iowa.data from the third national cancer survey and data collected under the auspices of the national cancer institute's surveillance, epidemiologic and end results (seer) program were used to perform a descriptive epidemiologic study of leukemia in iowa. data were also collected on livestock population patterns in the state, and a survey was performed to locate cases of lymphosarcoma within the cattle population. ecologic relationships between human leukemia, livestock populations and bovine lymphos ...19806930819
verdict rendered in iowa extra-label countersuit. 19948188500
the role of deer as a possible reservoir host of potosi virus, a newly recognized arbovirus in the united states.potosi (pot) virus (bunyaviridae) was isolated from aedes albopictus, an introduced asian mosquito species, collected at a used tire yard in potosi, missouri (usa), in august and september, 1989. in september, 1990, small animals were trapped at the tire yard and six cattle were sampled at an adjacent farm; in november 1990 and 1991, blood samples were collected with filter paper strips from 364 hunter-killed, white-tailed deer (odocoileus virginianus) in the region to determine the possible res ...19968827670
far removed from the iowa "cow war". 19979054987
results of a nationwide survey to determine feedstuffs fed to lactating dairy cows.a nationwide survey to determine feedstuffs used in the diets of dairy cows was conducted. this survey was mailed to dairy nutritionists at universities in each state to describe the use of 144 feedstuffs. twenty-eight states responded and were grouped by region as follows: northeast (maine, maryland, new hampshire, new york, ohio, vermont, and west virginia), northwest (idaho, oregon, and washington), midwest (iowa, illinois, michigan, minnesota, missouri, nebraska, north dakota, south dakota, ...199910068966
'mad cow' particle challenges infection control. 199610158526
virulence of three distinct cryptosporidium parvum isolates for healthy adults.the infectivity of three cryptosporidium parvum isolates (iowa [calf], ucp [calf], and tamu [horse]) of the c genotype was investigated in healthy adults. after exposure, volunteers recorded the number and form of stools passed and symptoms experienced. oocyst excretion was assessed by immunofluorescence. the id50 differed among isolates: iowa, 87 (se, 19; 95% confidence interval [ci], 48.67-126); ucp, 1042 (se, 1000; 95% ci, 0-3004); and tamu, 9 oocysts (se, 2.34; 95% ci, 4.46-13.65); tamu vers ...199910479158
serotyping of mannheimia (pasteurella) haemolytica isolates from the upper midwest united states.mannheimia (pasteurella) haemolytica biotype a serotype1 (a1) is the primary bacterial agent responsible for the clinical signs and pathophysiologic events in bovine pneumonic pasteurellosis. the goal of this study was to determine the prevalence of other serotypes of m. haemolytica biotype a organisms obtained from the upper midwest diagnostic laboratories. a total of 147 m. haemolytica isolates were collected from minnesota, south dakota, and michigan. isolates were tested against m. haemolyti ...200011108463
suspected cresol poisoning in cattle presented for slaughter.cresol poisoning was suspected in agroup of cattle presented for slaughter at a federaly inspected plant in illinois. four cattle died shortly after being unloaded at the slaughter facility, while another animal died after being returned to the feedlot of origin in iowa. the clinical signs in the affected cattle were lethargy, depression, ataxia, leg weakness, sternal recumbency, dehydration, and severe bloating. metacresol (3-methyl phenol), commonly found in disinfectants used to clean and san ...200211824764
molecular typing of papillomatous digital dermatitis-associated treponema isolates based on analysis of 16s-23s ribosomal dna intergenic spacer regions.papillomatous digital dermatitis (pdd), an emerging infectious disease of cattle, is characterized by painful, ulcerative foot lesions. the detection of high numbers of invasive spirochetes in pdd lesions suggests an important role for these organisms in the pathogenesis of pdd. pdd-associated spirochetes have phenotypic characteristics consistent with members of the genus treponema: partial 16s ribosomal dna (rdna) sequence analysis of clonal isolates from california cattle showed that they com ...200212202594
serologic survey of cattle in the northeastern and north central united states, virginia, alaska, and hawaii for antibodies to cache valley and antigenically related viruses (bunyamwera serogroup virus).bovine sera from northeastern states (connecticut, delaware, maine, maryland, massachusetts, new york, pennsylvania, vermont, and west virginia), north central states (indiana, illinois, iowa, kentucky, michigan, minnesota, north dakota, ohio, south dakota, and wisconsin), virginia, alaska, and hawaii were examined for the presence of neutralizing antibodies to cache valley (cv), lokern (lk), main drain (md), northway (nw), and tensaw (ts) viruses. microneutralization tests were performed using ...200212363055
q fever in iowa dairy cattle. 195813610749
serologic survey of toxoplasmosis in iowa domestic animals. 196414114825
observations on brucellosis in iowa. 196414198575
echinococcus multilocularis in a beef cow from the middle west. 196514241418
further observations on the epidemiology of leptospirosis in iowa. 1. cases occurring among abattoir employees. 196414270075
human leptospirosis in iowa. 196514292744
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
productivity and hay requirements of beef cattle in a midwestern year-round grazing system.our objective was to evaluate a replicated (n = 2) midwestern year-round grazing system's hay needs and animal production compared with a replicated (n = 2) conventional (minimal land) system over 3 yr. because extended grazing systems have decreased hay needs for the beef herd, it was hypothesized that this year-round system would decrease hay needs without penalizing animal production. in the minimal land (ml) system, two replicated 8.1-ha smooth bromegrass-orchardgrass-birdsfoot trefoil (sb-o ...200415318752
comparison of farmers in the agricultural health study to the 1992 and the 1997 censuses of agriculture.the agricultural health study (ahs) is a large, prospective cohort study in the states of iowa and north carolina that has been developed to better understand how pesticides and other agricultural exposures relate to the occurrence of cancer and other diseases.200515927914
association between the existence of calves persistently infected with bovine viral diarrhea virus and commingling on pen morbidity in feedlot cattle.to determine the association between the existence of a calf persistently infected (pi) with bovine viral diarrhea virus (bvdv) and pen morbidity.200516379658
survey of management practices on reproductive performance of dairy cattle on large us commercial farms.a survey regarding general management, sire selection, reproductive management, inseminator training and technique, heat abatement, body condition scoring, facility design and grouping, nutrition, employee training and management, and animal health and bio-security was carried out from march to september of 2004 in 153 herds in the alta genetics (watertown, wi) advantage progeny testing program. a total of 103 herds (67.3%) completed the survey. herd size was 613 +/- 46 cows, with herds located ...200617106104
pesticides and other agricultural factors associated with self-reported farmer's lung among farm residents in the agricultural health study.farmer's lung, or hypersensitivity pneumonitis, is an important contributor to respiratory morbidity among farmers.200717182642
new building to advance study of tuberculosis in cattle, wildlife. 200717696847
a randomized and blinded field trial to assess the efficacy of an autogenous vaccine to prevent naturally occurring infectious bovine keratoconjunctivis (ibk) in beef calves.a randomized and blinded 2-arm parallel trial was conducted to assess the efficacy of an autogenous vaccine to prevent naturally occurring infectious bovine keratoconjunctivis (ibk) in beef calves. the trial was managed between may and november 2008 on university owned farms in iowa and wisconsin. the vaccine at iowa contained moraxella bovoculi (m. bovoculi) while the organism used in the wisconsin herds vaccine was branhemella ovis (b. ovis renamed m. ovis). calves born between january and may ...200919531391
fatalities caused by cattle--four states, 2003-2008.during 2003-2007, deaths occurring in the production of crops and animals in the united states totaled 2,334; of these, 108 (5%) involved cattle as either the primary or secondary cause. during the same period, iowa, kansas, missouri, and nebraska accounted for 16% of the nation's approximately 985,000 cattle operations and 21% of the nation's cattle and calf herd. to better characterize cattle-caused deaths in these four states, investigators reviewed all such deaths occurring during the period ...200919644440
species of cryptosporidium detected in weaned cattle on cow-calf operations in the united states.to determine the species and distribution of cryptosporidium in weaned beef calves in the united states, fecal specimens were collected from 819 cattle between 6 and 18 months of age from 49 operations in 20 states (alabama, california, colorado, georgia, idaho, iowa, kansas, louisiana, mississippi, missouri, nebraska, new mexico, north dakota, oklahoma, oregon, south dakota, tennessee, texas, virginia, and wyoming). fresh feces, collected either from the ground or directly from the rectum of ea ...201020338690
evaluation of a biological risk management tool on large western united states dairies.critical to changing biosecurity practices on the farm is an individual assessment of those practices contributing to disease transmission. the purpose of this project was to assess, implement, and refine a biological risk management survey for use on large western united states dairy farms. assessment tools developed by iowa state university center for food security and public health (ames, ia) were refined using a focus group process and by testing them on 40 dairy herds in california. each qu ...201020723684
seroprevalence of anaplasma marginale in 2 iowa feedlots and its association with morbidity, mortality, production parameters, and carcass traits.a prospective cohort observational study was conducted to investigate the seroprevalence of anaplasma marginale in iowa feedlots and its association with morbidity, mortality, and treatment costs. blood samples were taken from 659 calves from 31 consigners at processing and classified as seropositive to a. marginale using a competitive enzyme-linked immunosorbent assay (celisa) with a 30% cutoff. health and production parameters were modeled by a. marginale serostatus with mixed model regression ...201021037886
the establishment of enterobacteriaceae and salmonella london in a new dairy farm environment.salmonella spp. are important zoonotic pathogens in humans and animals. a longitudinal study was conducted at the iowa state university's campus (at the dairy/animal science education and discovery facility) to observe change in enterobacteriaceae (specifically salmonella) before and after the placement of dairy livestock. to our knowledge, this is the first study that evaluated environmental changes of gram-negative organisms in a new dairy farm environment. environmental samples were taken usi ...201021117985
grazing management effects on sediment, phosphorus, and pathogen loading of streams in cool-season grass pastures.erosion and runoff from pastures may lead to degradation of surface water. a 2-yr grazing study was conducted to quantify the effects of grazing management on sediment, phosphorus (p), and pathogen loading of streams in cool-season grass pastures. six adjoining 12.1-ha pastures bisected by a stream in central iowa were divided into three treatments: continuous stocking with unrestricted stream access (csu), continuous stocking with restricted stream access (csr), and rotational stocking (rs). ra ...201121712600
Prevalence of Staphylococcus aureus and methicillin-resistant Staphylococcus aureus (MRSA) on retail meat in Iowa.Several recent studies have indicated a high prevalence of methicillin-resistant Staphylococcus aureus (MRSA) in retail-available meat. However, few studies have investigated MRSA in meat in the United States. The aim of this study was to determine the presence of Staphylococcus aureus (S. aureus) on meat samples available at retail stores. Samples of fresh raw pork, chicken, beef, and turkey were purchased from 22 food stores throughout Iowa. S. aureus strains were isolated from 27 of 165 sampl ...201122000843
biochemical and molecular characterization of treponema phagedenis-like spirochetes isolated from a bovine digital dermatitis lesion.bovine papillomatous digital dermatitis (dd) is the leading cause of lameness in dairy cattle and represents a serious welfare and economic burden. found primarily in high production dairy cattle worldwide, dd is characterized by the development of an often painful red, raw ulcerative or papillomatous lesion frequently located near the interdigital cleft and above the bulbs of the heel. while the exact etiology is unknown, several spirochete species have been isolated from lesion material. four ...201324304812
retrospective evaluation of health event data recording on 50 dairies using dairy comp 305.the purpose of this study was to characterize health data recording in herds using dairy comp 305 (valley agricultural software, tulare, ca), focused on the most common diseases of dairy cattle: mastitis, uterine infection (metritis), and diseases causing lameness. herds using dairy comp 305 were chosen for the study because it was the most commonly used program in the united states (35% of operations using computer records/60% of cows on operations using computer records), the authors were fami ...201222818483
estimates of variability for somatic cell count measurements in the iowa dairy industry.the scc collected from 15 instruments in 12 laboratories were used to quantify accuracy, repeatability, and reproducibility in the iowa dairy industry. for each of three trials, milk was sampled at the morning milking from 30 different holsteins in the iowa state university herd. identified samples and unidentified duplicates were provided for each participating instrument. mean scc was 418,000 cells/ml, and mean scc for duplicates ranged from 9000 to 3,966,000. accuracy for a set of 30 duplicat ...19957782511
behavioral traits of feedlot steers in iowa. 19734763375
factors affecting in-transit shrink and liver abscesses in fed steers.live weight loss (shrink) and liver conditions (abscesses) were determined on 3,570 crossbred steers of predominantly british breeding over a 5-yr period. starting in november 1979, steers were placed on feed at bimonthly intervals and provided one of three housing treatments: no shelter, access to overhead shelter or confinement. all steers were implanted with synovex during the first 3 yr and compudose the last 2 yr and fed a diet consisting of high-moisture corn grain, which provided 85% of t ...19892703434
survey of dairy management practices on one hundred thirteen north central and northeastern united states dairies.the objective was to conduct a broad survey of dairy management practices that have an effect on animal well-being. dairies were visited during the fall and winter of 2005 and 2006 in wisconsin, minnesota, indiana, iowa, and new york. data were collected on 113 dairies on colostrum feeding, dehorning, tail-docking, euthanasia methods, producer statements about welfare, use of specialized calf-raising farms (custom), level of satisfaction with calf-raising by producers, and cow behavior. calves w ...200818349262
nature and cause of bilateral ocular dermoids in hereford cattle.nature and cause of bilateral ocular dermoids were investigated by field studies, pedigree analysis, clinical examination, light microscopy, scanning electron microscopy, and transmission electron microscopy. it was determined that ocular dermoids in hereford cattle are a genetically transmitted defect; characteristics of autosomal recessive and polygenic inheritance were observed. calves typically were affected bilaterally with multiple, connected ocular growths that clinically, histologically, ...19846730222
management, operational, animal health, and economic characteristics of large dairy herds in 4 states in the upper midwest of the united states.recent trends in dairy farm structure in the united states have included a decreasing number of farms, although farm size has increased, especially the share of milk production from very large herds (>2,500 cows). the objectives of this observational study were to describe common management practices; to characterize labor and operational structure; to measure some aspects of animal health, including lameness, hock lesions, mortality, and mastitis incidence; and to summarize cost of production o ...201728888599
inflammatory biomarkers are associated with ketosis in periparturient holstein cows.ketosis is a prevalent periparturient metabolic disorder and we hypothesize that lipopolysaccharide (lps) infiltration may play a key role in its etiology. study objectives were to characterize biomarkers of inflammation during the transition period in healthy and clinically diagnosed ketotic cows. cows were retrospectively categorized into one of two groups: healthy and clinically diagnosed ketotic. two data sets were utilized; the first dataset (study a) was obtained as a subset of cows (n=16) ...201627892878
evaluation of central north american prairie management based on species diversity, life form, and individual species metrics.reintroduction of fire and grazing, alone or in combination, has increasingly been recognized as central to the restoration of north american mixed-grass and tallgrass prairies. although ecological studies of these systems are abundant, they have generally been observational, or if experimental, have focused on plant species diversity. species diversity measures alone are not sufficient to inform management, which often has goals associated with life-form groups and individual species. we examin ...200717531063
antimicrobial resistance among pasteurella spp recovered from missouri and iowa cattle with bovine respiratory disease complex.a retrospective study was conducted to determine the prevalence of antimicrobial resistance among pasteurella spp recovered from cattle with bovine respiratory disease complex. the study extended from january 1976 through may 1980, and included a review of the necropsy records of 386 beef cattle. susceptibility or resistance of the pasteurella isolants was determined by using the standard disk diffusion susceptibility test. each isolant was tested for susceptibility with 15 different antimicrobi ...19827130010
multi-state beef reproduction task force provides science-based recommendations for the application of reproductive technologies.since its formation, the beef reproduction task force (brtf) has worked to enhance productivity and profitability of u.s. beef herds by integrating research and extension efforts with the intent of more effectively transferring the use of reproductive technologies to the field. a key early step was to coordinate efforts in identifying effective breeding management protocols for beef cattle and to clarify their associated acronyms. a short-list of recommended protocols and their acronyms for sync ...201121571895
complete genome sequence and pathogenicity of two swine parainfluenzavirus 3 isolates from pigs in the united states.two novel paramyxoviruses, 81-19252 (texas81) and 92-7783 (isu92), isolated from the brains of pigs in the united states in the 1980s and 1990s, were characterized. the complete genome of texas81 virus was 15,456 nucleotides (nt) in length, that of isu92 was 15,480 nt, and both genomes consisted of six nonoverlapping genes, predicted to encode nine proteins, with conserved and complementary 3' leader and 5' trailer regions and conserved gene starts, gene stops, and trinucleotide intergenic seque ...201019906928
the availability of state-level data on interstate cattle movements in the united states.knowledge about the patterns of animal movement--particularly feeder-cattle movement--within the usa is necessary in order to anticipate how diseases might be spread geographically. this study was conducted to explore the availability of interstate-level movement data which might be used to develop a more coherent national picture of interstate feeder-cattle movement. state statistical offices of the national agricultural statistics service, 1996 (nass) and departments of agriculture in all 50 s ...19989879593
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