| chlorine gas poisoning in farm livestock: case report and review. | | 1971 | 4926539 |
| animal waste: a new problem. | | 1972 | 4565063 |
| epidemiology of potomac horse fever: an investigation into the possible role of non-equine mammals. | a serological study of antibodies to ehrlichia risticii was carried out on 10 species of wild and domestic mammals found on or near 21 horse farms in an area of the usa in which potomac horse fever is endemic. no antibodies were found in 133 peridomestic rodents (norway rats and house mice), nor in 108 wild rodents (white-footed mice and meadow voles) captured on farms. three of the six domestic animal species examined, cats, pigs and a goat, showed serological evidence of exposure to e risticii ... | 1989 | 2773237 |
| the nurse's role in the swine influenza immunization program. | | 1977 | 244353 |
| babesia mephitis sp. n. (protozoa: piroplasmida), a hematozoan parasite of the striped skunk, mephitis mephitis. | | 1970 | 4994127 |
| workshop on comparative pathology of hematopoietic and lymphoreticular neoplasms. | | 1971 | 5000995 |
| from the national institute of allergy and infectious diseases. rickettsiology conference. | | 1980 | 6154107 |
| evidence for widespread infection of wild rats with hepatitis e virus in the united states. | hepatitis e is an important medical pathogen in many developing countries but is rarely reported from the united states, although antibody to hepatitis e virus (anti-hev) is found in > 1% of u.s. citizens. zoonotic spread of the virus is suspected. sera obtained from 239 wild rats trapped in widely separated regions of the united states were tested for anti-hev. seventy-seven percent of rats from maryland, 90% from hawaii, and 44% from louisiana were seropositive for anti-hev. rats from urban as ... | 1999 | 10463689 |
| prevalence of campylobacter spp., escherichia coli, and salmonella serovars in retail chicken, turkey, pork, and beef from the greater washington, d.c., area. | a total of 825 samples of retail raw meats (chicken, turkey, pork, and beef) were examined for the presence of escherichia coli and salmonella serovars, and 719 of these samples were also tested for campylobacter spp. the samples were randomly obtained from 59 stores of four supermarket chains during 107 sampling visits in the greater washington, d.c., area from june 1999 to july 2000. the majority (70.7%) of chicken samples (n = 184) were contaminated with campylobacter, and a large percentage ... | 2001 | 11722889 |
| guillain-barré syndrome and the 1978-1979 influenza vaccine. | an ongoing surveillance program was intensified to determine whether an increased risk of acquiring vaccine-related guillain-barré syndrome (gbs) (similar to that observed after vaccination with the a/new jersey swine-influenza vaccine in 1976) existed for the approximately 12.5 million adults (greater than or equal to 18 years old) vaccinated in the 1978-1979 influenza campaign. in the contiguous united states (excluding maryland) 544 cases of gbs with onset between september 1, 1978, and march ... | 1981 | 7231501 |
| effect of exogenous gonadotropins on the weaning-to-estrus interval in sows. | the efficacy of pg 600 (400 iu pmsg and 200 iu hcg) for accelerating the onset of estrus was determined for sows weaned during the summer. yorkshire sows (average parity = 4.6), nursing 8.6 +/- 0.2 pigs (mean +/- sem) were weaned after 27.7 +/- 0.4 d of lactation and were treated intramuscularly with either pg 600 (n = 35) or with 0.9% saline (n = 35). sows were checked for estrus once daily in the presence of a mature boar. treatment with pg 600 increased (p < 0.05) the percentage of sows in es ... | 1998 | 10732090 |
| cessation of trichinella spiralis transmission among scavenging mammals after the removal of infected pigs from a poorly managed farm: implications for trichinae transmission in the us. | pigs infected with the zoonotic parasite trichinella spiralis were detected on a farm in maryland during an animal welfare investigation. sera and/or tissues were collected from 49 pigs and three pig carcasses (7 weeks of age to adult, mixed sex). the tissues were tested for the presence of t. spiralis muscle larvae (ml) by tissue digestion, and the sera were tested for the presence of anti-trichinella antibodies by elisa. seventeen of 50 (34%) pigs were infected with t. spiralis based on tissue ... | 2010 | 19968844 |
| nested case-control study of tumors of the hemopoietic and lymphatic systems among workers in the meat industry. | workers in the meat industry are exposed to viruses that cause leukemia and lymphoma in cattle and chickens, and also to carcinogenic chemical agents. this case-control study, nested in a cohort of members of a meatcutters' union in baltimore, maryland, investigated whether occupational exposures are associated with death from tumors of the hemopoietic and lymphatic systems. cases of these tumors represent all deaths which occurred in the cohort between 1949 and 1980. excess risks of tumors of t ... | 1998 | 9554414 |
| isolate designation and characterization of toxoplasma gondii isolates from pigs in the united states. | pigs are considered to be the most important meat source of toxoplasma gondii for humans in the united states. in the present study, 168 t. gondii isolates (designated tgpgus15-182) from various sources were genotyped using 10 polymerase chain reaction-restriction fragment length polymorphism (pcr-rflp) markers (sag1, sag2, sag3, btub, gra6, c22-8, c29-2, l358, pk1, and apico). genotyping data from an additional 14 isolates collected from t. gondii-infected pigs in maryland were included for ana ... | 2009 | 19245283 |
| an influenza a (h1n1) virus, closely related to swine influenza virus, responsible for a fatal case of human influenza. | in july 1991, an influenza a virus, designated a/maryland/12/91 (a/md), was isolated from the bronchial secretions of a 27-year-old animal caretaker. he had been admitted to the hospital with bilateral pneumonia and died of acute respiratory distress syndrome 13 days later. antigenic analyses with postinfection ferret antisera and monoclonal antibodies to recent h1 swine hemagglutinins indicated that the hemagglutinin of this virus was antigenically related to, but distinguishable from, those of ... | 1994 | 8138990 |
| enzyme polymorphism in ascaris suum (nematoda). | the potential of multilocus electrophoretic studies for providing insight into the population biology of parasitic organisms was studied using the swine parasite ascaris suum suum. thirty-eight loci encoding enzymatic or nonenzymatic proteins have been resolved in extracts of adult worms by starch-gel electrophoresis. a preliminary study of variation in ascaris from eastern iowa revealed an average heterozygosity of 6.6%. allele frequencies at six polymorphic loci were similar in males and femal ... | 1982 | 6889643 |
| molecular analysis of escherichia coli from retail meats (2002-2004) from the united states national antimicrobial resistance monitoring system. | the origins and virulence potential of meat product-associated escherichia coli are undefined. | 2009 | 19508167 |
| the first laboratory-confirmed rabid pig in maryland, 2003. | this article is the first to describe the clinical picture and potential human health impact of laboratory-confirmed rabies infection in a pet vietnamese pot-bellied pig in maryland. although cases of confirmed rabies infection have been infrequently reported in pet or agricultural during the past 10 years in the united states, exposure to rabies-positive animals remains a public health concern particularly for veterinarians, pet owners and other animal caretakers. it is important that individua ... | 2008 | 18811906 |
| endemic toxoplasmosis in pigs on a farm in maryland: isolation and genetic characterization of toxoplasma gondii. | the prevalence of toxoplasma gondii was investigated on a poorly managed pig farm in maryland. serum and tissue samples from 48 of the 100 pigs on the farm were available for t. gondii evaluation. serological testing was performed using both elisa and the modified agglutination test (mat). antibodies to t. gondii were detected by elisa in 12 of 48 animals, while antibodies were detected in 34 of 48 pigs by mat with titers of 1:10 in 1, 1:20 in 4, 1:40 in 7, 1:80 in 3, 1:160 in 8, 1:320 in 3, 1:6 ... | 2008 | 18372619 |
| race, medical researcher distrust, perceived harm, and willingness to participate in cardiovascular prevention trials. | minority underrepresentation exists in medical research including cardiovascular clinical trials, but the hypothesis that this relates to distrust in medical researchers is unproven. therefore, we examined whether african american persons differ from white persons in perceptions of the risks/benefits of trial participation and distrust toward medical researchers, and whether these factors influence willingness to participate (wtp) in a clinical drug trial. participants were self-administered a s ... | 2008 | 18204365 |
| the prevalence of microsporum nanum infection in swine. | | 1965 | 14291573 |