| retrospective serological study on bluetongue antibody prevalence in a louisiana herd. | | 1985 | 2997956 |
| prevalence of trypanosoma theileri in louisiana cattle. | cattle (from 5 sites in louisiana) were examined by blood culture for the presence of trypanosoma theileri. a prevalence of 81% was found in the 291 cattle examined. a greater number of beef cattle (93%) than dairy cattle (73%) was infected. differences in prevalence in cattle from different regions of the state were not noted. | 1990 | 2213419 |
| preputial injuries in beef bulls: 172 cases (1980-1985). | one hundred seventy-two bulls with preputial injuries were treated from 1980 through 1985. most of the injuries developed during the breeding season (april through august), with a peak during june. the number (111) of bulls represented by 3 beef breeds (brangus, brahman, beefmaster) was greater than the number (61) of the other 9 breeds included in the survey. preputial prolapse (pp) and posthitis without obvious laceration was diagnosed in 82 of 172 bulls. preputial laceration, abscessation, st ... | 1988 | 3170324 |
| radiologic hazards and defense. | | 1987 | 3570931 |
| seroepidemiology of anaplasma marginale in white-tailed deer (odocoileus virginianus) from louisiana. | antibodies to anaplasma marginale were detected by the indirect fluorescent antibody test (ifa) in six of 331 (2%) serum samples of white-tailed deer (odocoileus virginianus) from louisiana. none of the serum samples were positive using the a. marginale modified rapid card agglutination test. of the six ifa positive sera retested by the complement fixation test four sera gave anticomplementary and two gave seropositive reactions. the low a. marginale reactor rate in this white-tailed deer popula ... | 1989 | 2668567 |
| identification and characterization of bahia grande, reed ranch and muir springs viruses, related members of the family rhabdoviridae with widespread distribution in the united states. | sixteen virus isolates with similar biological characteristics were obtained from salt-marsh mosquitoes collected in south texas in 1974. when compared antigenically, these and 13 other isolates from mosquitoes collected between 1972 and 1979 in west texas, new mexico, louisiana, colorado and north dakota were shown to be related but not identical. three distinct serotypes were determined: bahia grande (prototype strain tb4-1054), reed ranch (tb4-222) and muir springs (76v-23524). when examined ... | 1986 | 2872270 |
| incidence of clinical anaplasmosis in cattle in the red river plains and south-east areas of louisiana. | incidence rates for clinical anaplasmosis were estimated for dairy and beef cattle in the red river plains and south-east areas of louisiana. annual incidence rates of 0.33% and 0.21% were found in dairy cows for 1983 and 1984 while a 31.0% rate was found in beef cows for 1983. the rates were based on postal surveys of dairy and beef cattle producers. a survey of veterinary practices and a follow-up of respondents to the surveys provided a description of 256 cases of anaplasmosis. eighty-one per ... | 1989 | 2789450 |
| delayed phalaris grass toxicosis in sheep and cattle. | a phalaris grass (phalaris caroliniana) caused neurologic signs and lesions in cattle and sheep. the sheep were hyperexcitable and uncoordinated, with severe muscle twitching, stiff gait, and head nodding. the cattle were thin, nervous, and ataxic. one feature of chronic phalaris toxicosis in these cases was onset of signs weeks or months after removal of the animals from the forage. | 1989 | 2768059 |
| the cost of anaplasmosis in the red river plains and south-east areas of louisiana. | losses from morbidity and mortality due to anaplasmosis were assessed in beef and dairy cattle of the red river plains and south-east areas of louisiana. the cost of treatment and prevention of anaplasmosis and losses in milk production and those due to deaths or culling were valued at $0.5 million for the year 1983 in these two areas. the cost of prevention included the use of tetracyclines in feed and salt-mineral supplements, injectable tetracycline, vaccination and an estimated 10% of the co ... | 1989 | 2588475 |
| epidemiology of dictyocaulus viviparus in louisiana (u.s.a.). | an epidemiological investigation was conducted during a 1-year period on a permanent pasture naturally contaminated with dictyocaulus viviparus and grazed by a varying number of yearling cattle. seasonal variation in pasture infectivity to cattle was monitored by monthly slaughter of tracer calves, slaughter of pairs of resident yearlings at 30-60-day intervals, herbage larval recovery and by counts of first stage larvae in feces (modified baermann technique) of resident cattle. a clinical outbr ... | 1989 | 2524929 |
| anthrax in louisiana, 1971: an evaluation of the sterne strain anthrax vaccine. | | 1973 | 4200690 |
| effects of cattle density on new jersey light trap mosquito captures in the rice/cattle agroecosystem of southwestern louisiana. | cattle are the primary host for the major pest mosquito psorophora columbiae in the rice production region of the gulf-south. annual captures of ps. columbiae, anopheles crucians and an. quadrimaculatus in new jersey light traps in acadia parish in 1984 were correlated with cattle density within 0.8 km of the trap (r2 = 97, 68 and 74%, respectively). furthermore, 7 of 10 mosquito species commonly trapped were significantly correlated with cattle density (average r2 = 82%). this work documents ho ... | 1990 | 1973448 |
| the effect of management and ecological factors on the epidemiology of anaplasmosis in the red river plains and south-east areas of louisiana. | the relationship between clinical anaplasmosis and other disease morbidity, nutritional supplementation, vaccinations, external and internal parasite control, tetracycline supplementation, reproductive management and use of veterinary services was assessed in 320 beef cow-calf herds in the red river plains and south-east areas of louisiana. data were collected both by mailed questionnaires and by interviews with owners who reported the presence or absence of clinical anaplasmosis. a relationship ... | 1989 | 2588476 |
| anthrax in louisiana, 1971: epizootiologic study. | | 1973 | 4200691 |
| rabies surveillance in the united states during 1990. | in 1990, the united states and its territories reported 4,881 cases of rabies in animals to the centers for disease control, a 1.5% increase from 1989. of these, 553 were domestic animals, 4,327 were wild animals, and one was a human being. pennsylvania reported the highest number (611) of rabies cases in animals in 1990. for the first time since surveillance of rabies in wild animals was begun in the 1950s, the number of cases of rabies in raccoons exceeded that in skunks. particularly large in ... | 1992 | 1577642 |
| efficacy of levamisole against ostertagia ostertagi in louisiana cattle during maturation of inhibited larvae (september) and during minimal inhibition (december/january). | levamisole (lev) was tested in four experiments to compare efficacy values against ostertagia ostertagi when larval maturation was occurring (september), following inhibition and also when populations were expected to be largely adult (winter). a primary objective was to determine the importance of developing fourth-stage larvae (dl4) and inhibited, early fourth-stage larvae (el4) in replacing adult worms lost through treatment and the effect of this on reduced efficacy against adult worms. youn ... | 1991 | 1763492 |
| effect of location and season on body and testicular growth in brahman and hereford bulls. | to determine the effects of location and season on growth of bulls, hereford bulls from montana (mh; n = 15) and nebraska (nh; n = 15) and brahman bulls from texas and louisiana (bb; n = 18) were moved to three locations: montana (mt), nebraska (ne) or texas (tx). each location received 5 nh, 5 mh and 6 bb. control bulls (not relocated) were maintained at each location. all bulls were pubertal at the time of relocation in may 1984. at 28-d intervals, body weight, hip height, testis length and sc ... | 1990 | 2384353 |
| nocturnal distribution of louisiana riceland mosquito adults. | nocturnal riceland mosquito populations in southern louisiana were monitored using nonbaited cdc miniature light traps. a mixed population of anopheles quadrimaculatus, an. crucians, psorophora columbiae and culex salinarius adults was collected in a livestock occupied barn. highly variable numbers of all 4 species were trapped in areas away from the barns. species density at any given trap location was not related to trap location, type of habitat surrounding the trap or brush density near the ... | 1991 | 1686276 |
| variation amongst the neutralizing epitopes of bluetongue viruses isolated in the united states in 1979-1981. | neutralizing epitopes present on field isolates of bluetongue virus (btv) serotypes 10, 11, 13 and 17 were evaluated with a panel of polyclonal and neutralizing monoclonal antibodies (mabs). a total of 91 field isolates were evaluated, including 15 isolates of btv-10, 29 isolates of btv-11, 26 isolates of btv-13, and 21 isolates of btv-17. the viruses were isolated from cattle, goats, sheep, elk and deer in idaho, louisiana, nebraska and, predominantly, california, in the years 1979, 1980 and 19 ... | 1992 | 1379766 |
| an evaluation of serologic tests used to diagnose brucellosis in buffaloes (bubalus bubalis). | five serologic procedures were evaluated in buffaloes and results compared with cultures of 64 udder secretion specimens. the rivanol test was superior to all other methods in specificity. the card, rivanol and complement fixation tests identified all infected cows. many sera had complement fixing antibodies while agglutinins were absent. it was concluded that these were false positive results. a new procedure, the particle concentration fluorescence immunoassay, was a sensitive screening test b ... | 1992 | 1306917 |
| suitability of six lymnaeid snails for infection with fasciola hepatica. | the suitability of fossaria (bakerilymnaea) cubensis and pseudosuccinea columella from louisiana as intermediate hosts for fasciola hepatica was compared to p. columella and stagnicola elodes from ann arbor, mi, s. attenuata from hidalgo, mexico, lymnaea gedrosiana from iran and l. natalensis from senegal. p. columella from la was shown to be a more suitable host (51.3% became infected) than f. (b.) cubensis (15.2% and 26.4% of two populations became infected). the infection rate for p. columell ... | 1987 | 3617426 |
| effect of temperature-season on bovine adrenal cortical function, blood cell profile, and milk production. | data collected monthly for one calendar year from holstein cows lactating under louisiana ambient climatic conditions comprised a total of 264 cow-months. the year was divided into seasons of cool, intermediate, and hot temperatures. the hot season elicited depressions in circulating corticoids and percent hematocrit. leukocytosis was a response to increasing ambient temperature primarily accounted for by an increase in circulating neutrophils. progression from intermediate to hot season gave ev ... | 1976 | 1249274 |
| cardiovascular risk factors from birth to 7 years of age: the bogalusa heart study. serum lipids and lipoproteins. | serum lipids and lipoprotein cholesterol fractions were examined in a newborn cohort that was followed from birth to 7 years of age. although white and female infants had higher cord blood levels of high-density lipoprotein cholesterol (hdl-c) than did black and male infants, respectively, these differences did not persist throughout early childhood. mean levels of all serum lipids and lipoproteins increased greatly in the first 6 months of life, and by 2 years of age, levels approached those se ... | 1987 | 3478647 |
| prevalence of ibr-bvd-pi3 infections. | | 1975 | 167273 |
| additional investigations on hypobiosis of ostertagia ostertagi after transfer between northern and southern u.s.a. | | 1988 | 3372123 |
| psorophora columbiae larval density in southwestern louisiana rice fields as a function of cattle density. | | 1987 | 2904971 |
| fascioliasis in cattle in louisiana: development of a system to predict disease risk by climate, using the thornthwaite water budget. | a system correlating climate with the annual risk of fascioliasis in cattle in central louisiana was developed, using the thornthwaite water budget and a 6-year data base that included records on herd prevalence rates, transmission to fluke-free sentinel calves, and snail population dynamics. the system developed was compared with modifications of the wet-day and mt forecasting systems previously developed for use in the oceanic climate zone of western europe. the wet-day system correlated poorl ... | 1987 | 3631704 |
| the epidemiology of ostertagia ostertagi and other gastrointestinal nematodes of cattle in louisiana. | the epidemiology of ostertagia ostertagi and other gastrointestinal nematodes in yearling beef cattle was examined in each of 2 successive years. during each year 50 head of newly weaned beef calves were given a single dose of thiabendazole and then placed on experimental pastures. twenty-four of the animals were designated for monthly slaughter (n = 2) and analysis of worm population characteristics and 25 were designated for blood and faecal collection and for weighing. parasite-free tracer ca ... | 1987 | 3670895 |
| preweaning breed-of-sire comparisons involving the senepol breed of cattle. | preweaning data collected at two locations (kentucky, louisiana) were utilized to evaluate breed-of-sire comparisons involving the senepol breed of cattle. for the kentucky study, calves sired by senepol bulls were 1.3 kg heavier (p less than .05) at birth than calves sired by hereford bulls; however, weaning weights were similar for the two sire groups. for the louisiana study, calves sired by longhorn bulls were 5.3 kg lighter (p less than .01) at birth, 20 kg lighter (p less than .01) at wean ... | 1986 | 3722017 |
| a mathematical model of the population biology of ostertagia ostertagi in calves and yearlings. | a mathematical model of the population biology of ostertagia ostertagi is described. the model assumes that the natural control and regulation of parasite numbers is mediated by four processes: the effect of climate on the development and survival of the free-living stages; changes in the rate of establishment of the infective larvae, and density-dependent variations in parasite survival and fecundity. the model is used to compare the course of the infection in two groups of calves. one group is ... | 1987 | 3696772 |
| evaluation of crossbred brahman and continental european beef cattle in a subtropical environment for birth and weaning traits. | a total of 528 birth and 475 weaning records collected over a 3-yr period were analyzed to evaluate the productivity of several beef cattle breed crosses. the calves were produced by artificial insemination using 17 brahman, 15 chianina, 15 maine anjou and 16 simmental sires bred to angus and hereford dams varying in age from 3 to 11 yr. breed-of-sire effects were important (p less than .05 to p less than .001) for gestation length, birth weight, conformation score and condition score, but were ... | 1985 | 4077759 |
| seroprevalence of anaplasmosis in the red river plains and south-east areas of louisiana. | the indirect fluorescent antibody test was used to detect antibodies to anaplasma marginale in serum samples collected from cattle in the red river plains and south-east areas of louisiana. convenience sampling of herd clusters was used. a reactor rate of 7.8% was found in 11,085 samples. beef cattle had a 11.2% reactor rate compared with 3.8% for dairy cattle. the angus and angus cross-breed group had the highest reactor rate. | 1989 | 2675458 |
| effects of mosquitoes on the average daily gain of hereford and brahman breed steers in southern louisiana. | | 1973 | 4147834 |
| chlorine gas poisoning in farm livestock: case report and review. | | 1971 | 4926539 |
| determination of mosquito hosts in salt marsh areas of louisiana. | | 1969 | 4390086 |
| distribution of ostertagia ostertagi infective larvae on pasture herbage. | | 1973 | 4748245 |
| evaluation of a yearly insecticidal ear tag rotation for control of pyrethroid-resistant horn flies (diptera: muscidae). | from 1991 to 1997, the yearly alternated use of synergized pyrethroid (lambda-cyhalothrin + piperonyl butoxide) and organophosphate (pirimiphos-methyl) ear tags was evaluated for the control of two pyrethroid-resistant horn fly populations in louisiana. at each site, weekly fly counts were used to assess product efficacy. control achieved by synergized pyrethroid ear tag treatments was reduced from 7 to 2 weeks and from 4 to 0 weeks at st. joseph and winnsboro, respectively. control by organopho ... | 1999 | 10384908 |
| effects of mosquitoes on the average daily gain of feedlot steers in southern louisiana. | | 1972 | 4401441 |
| taking anthrax's genetic fingerprints. | | 2001 | 11729278 |
| develpoment and survival of infective larvae of the cattle nematode, ostertagia ostertagi. | | 1971 | 5102817 |
| sequential histopathologic changes of type i, pre-type ii and type ii ostertagiasis in cattle. | yearling cattle in louisiana were examined at monthly intervals for abomasal nematode burdens and histological lesions over a year. tracer calves were grazed for 3 to 4 weeks and removed from pasture for 2 to 3 weeks, then slaughtered; a few animals were killed in extremis shortly after removal from pasture. histological changes were correlated with worm burdens and characterized according to the type of ostertagia ostertagi infection present. in cattle with acute type i ostertagiasis, changes v ... | 1988 | 3363843 |
| prevalence of bovine herpesvirus-1, bovine viral diarrhea, parainfluenza-3, goat respiratory syncytial, bovine leukemia, and bluetongue viral antibodies in sheep. | sera from healthy sheep were collected in january and march 1982 from flocks of sheep located in southwestern and southeastern louisiana. these sera were tested for bovine herpesvirus-1 (bhv-1), bovine viral diarrhea virus (bvdv), parainfluenza-3 (pi-3) virus, and goat respiratory syncytial virus (grsv) antibodies by microtitration virus-neutralization test. the sera were tested also for bovine leukemia virus (blv) and bluetongue virus (btv) antibodies by immunodiffusion tests. the number of flo ... | 1984 | 6329044 |
| metabolic profile testing for jersey cows in louisiana: reference values. | one hundred twenty-seven jersey cows (1 to 6 years of age) within a 160.93-km radius of baton rouge, la, were selected at random over a 3-year period to determine serum values for total creatine kinase, aspartate transaminase, calcium, phosphorus, alkaline phosphatase, cholesterol, total protein, globulin, urea nitrogen, and glucose. breed and age were partitioned as possible sources of variation. seasonal temperature and management influences were taken into account by restricting the sampling ... | 1982 | 7103178 |
| performance of holstein and crossbred dairy cattle in louisiana. iii. health and viability. | viability and health disorders were compared for straightbred holsteins and crosses between holsteins, brown swiss, jerseys, and red sindhis. in addition, effects of mating systems and effects of various parts of red sindhi heredity on these traits were evaluated. losses before first calving per 100 females born alive were: holsteins 22; holstein-sired crosses 20: brown swiss-sired crosses 26; daughters of crossbred sires group i (sires had from 1/4 to 1/16 red sindhi heredity) 24; and group ii ... | 1975 | 1112938 |
| bluetongue infections in louisiana cattle. | bluetongue virus (btv) serotype 17 was isolated from cattle with clinical signs of bluetongue disease during 1978 and 1979 epizootics. bovine sera from 6 herds located in an epizootic region were examined in 1979 for antibodies, using an immunodiffusion (id) test. of 300 sera, 164 (54.7%) were seropositive. sera from statewide surveys of louisiana cattle in july to august 1980 and december 1980 to january 1981 were tested for btv antibodies, using the id test. fifty-eight of 70 herds (82.9%) and ... | 1982 | 6283967 |
| prevalence of bovine herpesvirus-1, bovine oral diarrhea, parainfluenza-3, bovine adenoviruses-3 and -7, and goat respiratory syncytial viral antibodies in goats. | sera from healthy goats were collected during october 1979 through october 1980. these sera were tested for bovine herpesvirus-1 (bhv-1), bovine viral diarrhea virus (bvdv), parainfluenza-3 (pi-3) virus, bovine adenoviruses (bav) -3 and -7, and goat respiratory syncytial virus (grsv) antibodies by microtitration virus-neutralization test. the number of herds with seropositive goats for each virus were: 5/38 (13.2%) for bhv-1; 9/38 (23.7%) for bvdv; 8/38 (21.1%) for pi-3 virus; 1/38 (2.6%) for ba ... | 1982 | 6285781 |
| metabolic profile testing in holstein cattle in louisiana: reference values. | | 1982 | 7149415 |
| survey of intramammary infections in dairy heifers at breeding age and first parturition. | a survey was conducted to determine and contrast prevalence of imi in nulligravid and primigravid dairy heifers pre- and postpartum. contrasts were made to evaluate the risk factors of location of dairy, trimester of gestation, and season of sampling on imi. twenty-eight dairies in california, louisiana, vermont, and washington were studied. lacteal secretions were collected aseptically from heifers at breeding age (8 to 19 mo) from one side of the gland and again at 4 d postpartum from all quar ... | 1995 | 7593857 |
| bluetongue virus in sheep and cattle and culicoides variipennis and c. stellifer (diptera: ceratopogonidae) in louisiana. | the transmission of bluetongue virus (blu) to sheep and cattle relative to culicoides abundance and infection was studied in two areas of the louisiana state university agricultural center, baton rouge, la. the seroprevalence of blu in beef cattle was 70.5% in 1989 and 37.0% in 1990; 2 of 37 animals tested in both years became positive, indicating active transmission. the prevalence of blu in sheep decreased from 52.2% in 1989 to 34% in 1990; seroconversion was not detected. serotypes of positiv ... | 1993 | 8395602 |
| dietary-atherosclerosis study on deceased persons. | | 1970 | 5460749 |
| feeding practices and income over feed cost on pasture-oriented dairy farms in louisiana. | monthly summary reports (n = 15,568) of holstein herds enrolled in the louisiana dhia program from february 1984 through april 1990 were analyzed using multiple regression techniques to determine the relationships between feeding practices and income over feed cost on predominantly pasture-oriented dairy farms. income over feed cost increased as silage and pasture quality score increased and decreased as hay and concentrate increased. milk yield increased as silage and concentrate increased. inc ... | 1993 | 8270697 |
| observations on nematode parasitism in cow-calf production systems in southcentral/southwestern usa. | observations on fecal egg count (fec) and nematode identification data were compiled to help determine the extent of nematode parasitism in cows and their nursing calves. overall mean fec values for cows in utah, louisiana, nevada, texas, and california were 7 eggs per gram (epg), 6 epg, 9 epg, 10 epg, and 15 epg, respectively. overall mean fec values for nursing calves from the same states were 7 epg, 228 epg, 3 epg, 60 epg, and 398 epg, respectively. the overall mean fec value for arizona cows ... | 1993 | 8484219 |
| age and seasonal effects on holstein yield for four regions of the united states over time. | multiplicative factors to adjust holstein yield for age and season of calving were calculated and analyzed from 20 data files for region and time. regions were 1) california, 2) minnesota and wisconsin, 3) new york and pennsylvania, and 4) six southern states (texas, louisiana, mississippi, alabama, georgia, and florida). time periods were calving years of 1964 to 1968, 1971 to 1975, 1976 to 1980, 1981 to 1985, and 1986 to 1990. the same statistical model was used that had been used to derive cu ... | 1995 | 8786269 |
| seventy-sixth annual meeting of the american dairy science association, baton rouge, louisiana. abstracts. | | 1981 | 7194889 |
| prevalence of antibodies to coxiella burneti in dairy cattle of northwest louisiana. | | 1971 | 5151789 |
| bull riding-related brain and spinal cord injuries--louisiana, 1994-1995. | rodeos are popular sporting events in the southern and western united states, and bull riders sustain 37% of all rodeo-related injuries--more than participants in any other rodeo event. during 1994-1995 in louisiana, five cases of central nervous system trauma associated with riding bulls in rodeo events were identified through the louisiana central nervous system injury registry, a statewide, population-based surveillance system addressing brain and spinal cord injury incidence, etiology, and o ... | 1996 | 8926995 |
| efficacy of a pour-on formulation of eprinomectin (mk-397) against nematode parasites of cattle, with emphasis on inhibited early fourth-stage larvae of ostertagia spp. | to evaluate efficacy of topically applied eprinomectin against inhibited early fourth-stage larvae (il4) of ostertagia spp in calves. | 1997 | 9099383 |
| anaplasmosis. | | 1969 | 5278168 |
| the effectiveness of a single dose of doramectin pour-on in the control of gastrointestinal nematodes in yearling stocker cattle. | three field studies were conducted to determine the efficacy of a single dose of doramectin pour-on in the control of gastrointestinal nematode infections in yearling stocker calves on pasture. these 140-day studies were carried out between october 1995 and march 1996 in tennessee (tn), between january and june 1997 in louisiana (la), and between may and september 1997 in wisconsin (wi). calves with patent nematode infections were equally allocated to treatments (doramectin pour-on, at 500 micro ... | 2000 | 10622609 |
| comparative efficacy of ivermectin pour-on, albendazole, oxfendazole and fenbendazole against ostertagia ostertagi inhibited larvae, other gastrointestinal nematodes and lungworm of cattle. | an experiment was conducted to evaluate the current efficacy of albendazole (abz), oxfendazole (oxf) and fenbendazole (fbz) compared with ivermectin pour-on (ivm-po) against inhibited early fourth-stage larvae (iel4) of ostertagia ostertagi, other gastrointestinal nematodes and lungworm of cattle during spring in louisiana. twenty-five crossbred beef heifer calves of 235 kg average weight and 10-12 months of age were acquired in late winter and grazed for 9 weeks on pasture contaminated with o. ... | 1997 | 9477494 |
| differences in susceptibility to gastrointestinal nematode infection between angus and brangus cattle in south louisiana. | breed susceptibility to nematode infection was evaluated in angus (bos taurus) and brangus (b. indicus crossbreed) cattle. a cow-calf herd and a yearling replacement heifer herd were monitored during one grazing season. calves were born in march and were weaned in october. individual rectal fecal samples were collected monthly from the two herds and processed for fecal egg counts (fec) and coprocultures. cow and calf fec increased from april, reaching maximum values during the summer. angus cows ... | 2000 | 10729645 |
| implications of proposed changes in bulk tank somatic cell count regulations. | several changes in bulk tank scc (btscc) regulations were proposed at the 1998 annual meeting of the national conference of interstate milk shippers (ncims) by the national mastitis council and other proponents. proposals included 1) using a geometric mean btscc in place of the arithmetic mean, reducing the current limit for btscc from 750,000 to 400,000, and modifying current regulatory protocols. the purpose of this research was to evaluate possible impacts of proposed changes upon producers i ... | 2001 | 11233021 |
| high environmental temperature and humidity decrease oocyte quality in bos taurus but not in bos indicus cows. | two experiments were conducted to assess the effects of environmental temperature and humidity on the quality and developmental capabilities of bovine oocytes. in experiment 1, bos taurus (holstein and crossbred angus) cows were subjected to 5 weekly sessions of ultrasound-guided follicle aspiration from february 16 through march 23 (cool season) and 5 sessions from may 22 through june 20 (hot season). in experiment 2, bos taurus (holstein) and bos indicus (brahman) cows were superstimulated (su ... | 1998 | 10732044 |
| effect of gastrointestinal nematode and liver fluke infections on weight gain and reproductive performance of beef heifers. | spring born, crossbred beef heifers (n=372) were utilized over four years to measure reductions in body weights, reproductive performance and calf weights caused by gastrointestinal nematodes (primarily ostertagia ostertagi) and the bovine liver fluke (fasciola hepatica) and to differentiate losses attributable to each type of parasitism. each year, weaned heifers were allotted to one of the four treatment regimens: group 1, untreated controls; group 2, treated for nematodes; group 3, treated fo ... | 2002 | 12127252 |
| fasciolosis in cattle in louisiana. ii. development of a system to use soil maps in a geographic information system to estimate disease risk on louisiana coastal marsh rangeland. | a geographic information system (gis) model of habitat for lymnaea bulimoides, the snail intermediate host of fasciola hepatica and the rumen fluke, calicophoron microbothrioides, on the chenier plain of southwest louisiana was revised to incorporate broad (greater than 100 m) chenier (relict beaches) along with adjacent marsh and transitional soils associated with spatial distribution of l. bulimoides habitat. the proportion of farmland comprised of soils of the gis model coincided with actual ... | 1993 | 8493767 |
| the use of epidemiology and clinical toxicology to assess environmental health problems. | historically, epidemiology has played an important role in the changes that have taken place over time as epidemics of important infectious diseases have been replaced with modern epidemics of chronic, degenerative diseases such as elevated blood pressure, various types of cancers, diabetes, and stroke, among others. two illustrations of the early uses of epidemiologic methods in investigations of disease outbreaks are described in the work of john snow, who described outbreaks of cholera in the ... | 1984 | 6436910 |
| prevalence of shiga-toxigenic escherichia coli o157:h7 in adult dairy cattle. | to describe shiga-toxigenic escherichia coil o157:h7 (stec o157:h7) fecal shedding prevalence, seasonal fecal shedding patterns, and site-specific prevalence from the oral cavity, skin, and feces of dairy cattle. | 2004 | 15074864 |
| loss of livestock reaches millions. | | 2005 | 16279374 |
| a comparison of the efficacy of two treatments of doramectin injectable, ivermectin injectable and ivermectin pour-on against naturally acquired gastrointestinal nematode infections of cattle during a winter-spring grazing season. | four groups of 18 crossbred beef steer calves (three replicates of six per group) were used to compare persistent efficacy of doramectin injectable, ivermectin injectable and ivermectin pour-on against naturally acquired infections of gastrointestinal nematodes during winter-spring grazing in louisiana. the experiment was initiated on january 11. treatments administered on day 0 and again on april 5 (day 84, 12-week interval) were: group 1, untreated controls (cont); group 2, doramectin (dor) at ... | 1997 | 9403978 |
| prevalence of escherichia coli o157:h7 in white-tailed deer from louisiana. | escherichia coli o157:h7 (ec o157) is an important zoonosis. white-tailed deer (odocoileus virginianus) have been implicated in transmission of this bacterium to humans and have been suggested as reservoirs that might affect carriage in cattle populations. our study objectives were to estimate prevalence of ec o157 in feces of hunter-harvested deer and to describe fecal shedding patterns in a captive herd sampled over 1 yr. prevalence of ec o157 in hunter-harvested deer was 0.3% (n = 338). in au ... | 2004 | 15362843 |
| biology-based mapping of vector-borne parasites by geographic information systems and remote sensing. | applications of growing degree day-water budget analysis and satellite climatology to vector-borne parasites are reviewed to demonstrate the value of using the unique thermal-hydrological preferences and limits of tolerance of individual parasite-vector systems to define the environmental niche of disease agents in the landscape by modern geospatial analysis methods. | 2005 | 16044674 |
| comparative assessment of the physico-chemical and bacteriological qualities of selected streams in louisiana. | the objective of this research was to compare the chemical/physical parameters and bacterial qualities of selected surface water streams in louisiana, including a natural stream (control) and an animal waste related stream. samples were collected and analyzed for fecal coliforms. fecal coliforms isolated from these samples were identified to the species level. chemical analysis was performed following standard test protocols (lamotte 2002). an analysis of biological oxygen demand (bod), chemical ... | 2005 | 16705806 |
| prevalence of selected bacterial infections associated with the use of animal waste in louisiana. | human health is a major concern when considering the disposal of large quantities of animal waste. health concerns could arise from exposure to pathogens and excess nitrogen associated with this form of pollution. the objective was to collect and analyze health data related to selected bacterial infections associated with the use of animal waste in louisiana. an analysis of adverse health effects has been conducted based on the incidence/prevalence rates of campylobacteriosis, e. coli o157:h7 in ... | 2005 | 16705805 |
| effects of mid-season avermectin treatments on pyrethroid resistance in horn fly (diptera: muscidae) populations at three locations in louisiana. | between 1999 and 2002, the effect of mid-season doramectin treatments on the level of resistance in pyrethroid-resistant horn fly populations was examined at three separate louisiana state university agricultural center research stations. the cattle were treated with pyrethroid ear tags in all years at all farms, and each farm received a mid-season doramectin treatment in 1 year. the number of weeks of control at red river was 11 weeks higher in the year following the mid-season treatment of dor ... | 2006 | 16769175 |
| cryptosporidiosis outbreaks associated with recreational water use--five states, 2006. | cryptosporidiosis is a gastrointestinal illness caused by parasitic protozoa of the genus cryptosporidium and can produce watery diarrhea lasting 1-3 weeks; one or two cases per 100,000 population are reported annually in the united states. fecal-oral transmission of cryptosporidium oocysts occurs through ingestion of contaminated drinking or recreational water, consumption of contaminated food, and contact with infected persons or animals (e.g., cattle or sheep). unlike bacterial pathogens, cry ... | 2007 | 17657205 |
| 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 ... | 2010 | 20338690 |
| trends for conception rate of holsteins over time in the southeastern united states. | the purpose of this study was to estimate trends in conception rate (cr) of holsteins in the southeastern united states over time across month by milk production level and month by days in milk (dim) subclasses. data were obtained from dairy records management systems (raleigh, nc) and included service records from 10 states (virginia, kentucky, north carolina, south carolina, tennessee, georgia, florida, alabama, mississippi, and louisiana). after eliminating records with lactation >1 and uncer ... | 2009 | 19700727 |
| detection of bluetongue virus rna in field-collected culicoides spp. (diptera: ceratopogonidae) following the discovery of bluetongue virus serotype 1 in white-tailed deer and cattle in louisiana. | in november 2004, bluetongue virus (family reoviridae, genus orbivirus, btv) serotype 1 (btv-1) was detected for the first time in the united states from a hunter-killed deer in st. mary parish, la. in 2005, sera surveys were conducted on three cattle farms near the area where the deer was found, and btv-1-seropositive cattle were found on two of the three farms; in 2006, sera surveys from the cattle on the three farms did not detect any btv-1-positive animals. the purpose of this study was to s ... | 2010 | 20380309 |
| prevalence of escherichia coli o157:h7 bacterial infections associated with the use of animal wastes in louisiana for the period 1996-2004. | animal waste from dairy and poultry operations is an economical and commonly used fertilizer in the state of louisiana. the application of animal waste to pasture lands not only is a source of fertilizer, but also allows for a convenient method of waste disposal. the disposal of animal wastes on land is a potential non-point source of water degradation. human health is a major concern when considering the disposal of large quantities of animal waste. health concerns could exist from exposure to ... | 2006 | 16823082 |
| blood hosts of aedes albopictus in the united states. | bloodfed aedes albopictus were collected during 1989-91 by vacuum aspirator from rural and urban study sites in missouri, florida, indiana, illinois, and louisiana. blood hosts identified by elisa and precipitin tests were rabbit (n = 91), rattus sp. (n = 69), dog (n = 14), unidentified mammal (n = 14), cow (n = 13), human (n = 10), deer (n = 10), sciurid (n = 7), turtle (n = 5), murid other than rattus sp. (n = 4), raccoon (n = 3), passeriform bird (n = 3), and cat (n = 2). as an opportunistic ... | 1994 | 7807094 |
| characterization of toxin genes and antimicrobial susceptibility of staphylococcus aureus isolates from louisiana retail meats. | staphylococcus aureus is a leading cause of food poisoning worldwide due to the production of heat-stable enterotoxins. recently, the isolation of methicillin-resistant s. aureus (mrsa) from food animals and retail meats raised additional food safety concerns. in this study, we characterized 152 s. aureus isolates, including 22 mrsa recovered from louisiana retail pork and beef meats, for the prevalence of nine enterotoxin and four other exotoxin genes by polymerase chain reaction and antimicrob ... | 2010 | 21034265 |
| rabies surveillance in the united states during 2010. | during 2010, 48 states and puerto rico reported 6,154 rabid animals and 2 human rabies cases to the cdc, representing an 8% decrease from the 6,690 rabid animals and 4 human cases reported in 2009. hawaii and mississippi did not report any laboratory-confirmed rabid animals during 2010. approximately 92% of reported rabid animals were wildlife. relative contributions by the major animal groups were as follows: 2,246 raccoons (36.5%), 1,448 skunks (23.5%), 1,430 bats (23.2%), 429 foxes (6.9%), 30 ... | 2011 | 21916759 |
| immunity from liability--when does it apply? | | 2003 | 12971045 |
| the veterinarian as an expert witness. | | 1982 | 7130005 |
| estimation of sensitivity and specificity of two diagnostics tests for bovine immunodeficiency virus using bayesian techniques. | the validation of assays for bovine immunodeficiency virus (biv) in cattle is hampered by the absence of a gold standard. two tests that often are used to detect biv are the indirect fluorescent-antibody assay (ifa) and the nested-set polymerase chain-reaction assay (pcr). ifa detects an antibody response whereas pcr detects the provirus in white blood cells. using bayesian techniques performed simultaneously on animals from two different dairy herds, we estimated the performance of the ifa and ... | 2003 | 14519338 |
| detection of target site resistance to pyrethroids and organophosphates in the horn fly using multiplex polymerase chain reaction. | the horn fly, haematobia irritans l., is an obligate blood-feeding fly and the primary insect pest parasitizing cattle in the united states. pesticide resistance has become a substantial problem for cattle producers, and although several mechanisms of resistance are possible, target site resistance is the most important mechanism preventing control of this fly in the united states and possibly other countries. we developed a multiplex polymerase chain reaction assay to detect the known target si ... | 2010 | 20939381 |
| seasonal changes of gastrointestinal nematode populations in yearling beef cattle in louisiana with emphasis on prevalence of inhibition in ostertagia ostertagi. | | 1983 | 6853015 |
| responses of holstein calves raised on limited milk to simulated louisiana summer climatic conditions. | | 1965 | 14285572 |