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prevalence of udder infections and mastitis in 50 california dairy herds.the california mastitis test (cmt) and bacteriologic culture were performed on samples of bulk-tank milk and cow-composite milk (n = 23,138 cows) from 50 california dairies, 19 of the 50 with known mastitis problems. thirty-eight (76.0%) bulk-tank milk samples and 12,334 (53.3%) cows were positive by results of the cmt. potential mastitis agents were isolated from 5,085 (22%) cows. staphylococcus aureus was isolated from all 50 herds, streptococcus agalactiae was isolated from 47 herds, and myco ...19883053547
serious infections in adults due to group b streptococci. clinical and serotypic characterization.serious infections in adults due to group b streptococci have been infrequently reported. we describe 24 such patients. bacteremic pyelonephritis, pneumonitis and endometritis were the most common clinical syndromes observed. group b streptococci infections tended to occur in patients with underlying illnesses, particularly genitourinary disorders and diabetes mellitus. mortality was surprisingly low (8 per cent). type iii was the serotype most commonly isolated, and there was no significant cor ...1976788513
colonization of mexican pregnant women with group b streptococcus. 19817012243
prevention of group b streptococcus early-onset disease: a toolkit by the california perinatal quality care collaborative.the california perinatal quality care collaborative (cpqcc) was organized in 1996 in an effort to improve perinatal outcomes in california. cpqcc has a robust infrastructure of quality improvement resources and expertise and uses a database of demographic and outcome data from neonatal intensive care units in california. in 2004, cpqcc developed a toolkit to provide an evidence-based framework and supporting documents for hospitals to use in systematically addressing persistent early-onset disea ...201019657350
cost-effectiveness of diagnostic strategies using quantitative real-time pcr and bacterial culture to identify contagious mastitis cases in large dairy herds.diagnostic strategies to detect contagious mastitis caused by mycoplasma bovis, staphylococcus aureus, and streptococcus agalactiae in dairy herds during an outbreak have been minimally studied with regard to cost and diagnostic sensitivity. the objective of this cross-sectional study was to compare the cost-effectiveness of diagnostic strategies for identification of infected cows in two california dairy herds during contagious mastitis outbreaks. m. bovis was investigated in a subset of a herd ...201424485275
epidemiology of group b streptococcus: longitudinal observations during pregnancy.a longitudinal, three-year study of the epidemiology of group b streptococcus was conducted with repeated (four to 11) observations of 382 patients followed through pregnancy, delivery, and the postpartum period. group b streptococci (2.3% of which were nonhemolytic) were isolated from the birth canal at first visit from 15% of the patients and from 28% with repeated cultures. overall, group b streptococci were isolated at 12% of culture visits. streptococcal carriage was significantly less comm ...1978351070
neonatal group b streptococcal infection in a managed care population. perinatal group b streptococcal infection study group.in a health maintenance organization population, we determined the incidence of early-onset (at less than or equal to 7 days) neonatal group b streptococcal (gbs) disease, the sensitivity and prevalence of labor risk factors, the adherence to a protocol for intrapartum antibiotics, and the costs for care of and outcomes of affected infants.19989649086
clinical mastitis in two california dairy herds participating in contagious mastitis control programs.the occurrence of clinical mastitis in two large california dairy herds over a 3-yr period is described. herds had been participating for 15 or 22 yr in mastitis control programs against streptococcus agalactiae and staphylococcus aureus, had low bulk tank scc, and had maintained good standards of hygiene and husbandry, but clinical mastitis remained a serious problem. a total of 1654 clinical mastitis cases were detected; the annual incidence in each herd was 49%. coliform bacteria and environm ...19902341640
microbiologic investigation of an epizootic of mastitis caused by serratia marcescens in a dairy herd.an epizootic of subclinical and clinical mastitis caused by serratia marcescens was investigated in a 1,000-cow dairy farm in california. serratia marcescens was isolated from 13 to 18% of composite milk samples obtained from lactating dairy cows. during monthly milk sampling performed during a 4-month period, s marcescens was isolated from 38.8 to 62.3% of composite milk samples obtained from cows from which s marcescens was previously isolated. few cows infected with s marcescens had evidence ...19921559873
relationship between mastitis pathogen numbers in bulk tank milk and bovine udder infections in california dairy herds.samples of bulk tank milk and cow-composite milk from 23,138 dairy cows from 50 california dairies were examined by use of microbiologic procedures. the number of colonies of mastitis pathogens isolated per milliliter of bulk tank milk (used as a predictor of the percentage of infected cows in the herd) was evaluated, using simple regression analysis and spearman's rank correlation. correlations between the pathogens and the percentage of cows in each herd shedding the pathogens were found for s ...19863531123
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