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emerging thermotolerant campylobacter species in healthy ruminants and swine.campylobacters other than campylobacter jejuni or c. coli were isolated in 35% of 343 farms recently analyzed in northern spain. this study was aimed at identifying at the species level the 120 isolates collected (21 ovine, 52 beef cattle, 44 dairy cattle, and 3 porcine) by species-specific polymerase chain reaction and 16s rrna gene sequencing analysis. thus, five species were identified: campylobacter hyointestinalis (90 isolates), campylobacter lanienae (12), campylobacter fetus subsp. fetus ...201121438765
investigation of bovine venereal campyloacteriosis in beef cow herds in new zealand.to determine regional prevalences of beef cow herds in new zealand positive for campylobacter fetus subsp venerealis antibodies in samples of vaginal mucus tested using an immunoglobulin (ig) a enzyme-linked immunosorbent assay (elisa), and to examine the suitability of the iga elisa for detecting infection with c. fetus subsp venerealis under field conditions in new zealand.200515731834
the association between antibody titres against campylobacter fetus and milk production efficiency in dairy cattle.the association between serological evidence of exposure to campylobacter fetus and milk production performance was studied in 178 lactating cows from three california dairy herd improvement association herds using a cross-sectional study design in december 1986. elisas were used to determine the antibody titres against campylobacter fetus, haemophilus somnus and leptospira hardjo, which were classified as either negative or positive. the status of a cow as negative or positive against c. fetus ...19938284894
the association between antibody titres against campylobacter fetus and reproductive efficiency in dairy cattle.the relationship between the antibody titres against campylobacter fetus and various indices of reproductive efficiency was studied in a cross-sectional study of 178 dairy cows from three california dairy herd improvement association herds. blood samples were collected from the lactating cows during december 1986. enzyme-linked immunosorbent assays were used to determine the antibody titres of the cow against campylobacter fetus, haemophilus somnus and leptospira hardjo and were classified as ei ...19938212528
survey of nine abortifacient infectious agents in aborted bovine fetuses from dairy farms in beijing, china, by pcr.abortion in dairy cattle causes considerable economic losses to the dairy industry. aborted fetuses and samples from the corresponding aborting dams from 12 dairy herds in beijing were tested for 9 abortifacient infectious pathogens by pcr between 2008 and 2010. from a total of 80 abortion cases collected during this period, infectious agents were detected in 45 (56.3%) cases, 22 (48.9%) of which represented co-infections with two or three infectious agents. the detected pathogens included infec ...201222366134
prevalence of bovine genital campylobacteriosis and trichomonosis of bulls in northern nigeria.a survey was conducted to determine the prevalence of campylobacteriosis and trichomonosis, and their concurrence with brucellosis, in cattle in three states of northern nigeria.201323927676
pcr detection of campylobacter fetus subspecies venerealis in smegma samples collected from dairy cattle in fars, iran.bovine venereal campylobacteriosis, caused by campylobacter fetus subsp. venerealis (cfv), is regarded as one of the major threats to the cattle industry around the world. abortion and infertility are two important reproductive problems in cows infected with c. fetus subsp. venerealis. reports on the presence of cfv are scarce in the cattle, in iran. therefore, the present study was designed to examine the presence of cfv in the reproductive tract of dairy cattle either slaughtered in shiraz aba ...201325568676
new molecular microbiology approaches in the study of campylobacter fetus.campylobacter fetus infection is a substantial problem in herds of domestic cattle worldwide and a rising threat in human disease. application of comparative and functional genomics approaches will be essential to understand the molecular basis of this pathogen's interactions with various hosts. here we report recent progress in genome analyses of c. fetus ssp. fetus and c. fetus ssp. venerealis, and the development of molecular tools to determine the genetic basis of niche-specific adaptations. ...201121255368
the bacteriology of bovine abortion, with special reference to acquired immunity.in a large herd of dairy cattle and young stock the bacteriological examination of 109 cases of abortion which included a relatively thorough study of the fetus and a study of the membranes, or swabs from the uterus whenever obtainable, gave the following results. 62, or 57 per cent, were associated with bacillus abortus. 26, or 23.8 per cent, were associated with spirilla. 2, or 1.8 per cent, were associated with bacillus pyogenes. 19, or 17.4 per cent, were either sterile or else the digestive ...191919868362
a sero-epidemiological study of haemophilus somnus infection in dairy cattle.five repeated cross-sectional serological surveys of 790 dairy cattle in 4 dairy herds between december 1985 and february 1987 provided an opportunity to study the changes in the seroprevalence of haemophilus somnus across the 5 surveys and with respect to some demographic and disease variables. the demographic variables included were age (heifers or cows) and farm, representing two groups of herds (two herds in each group, located in the central and northern valleys of california). the serologi ...19979151407
levels of some reproductive diseases in the dairy cattle of colombia.of 4,144 serum samples collected from cows on 113 farms from eight areas of colombia 3.3% had positive and 8.8% inconclusive titres to brucella abortus, 21.7, 6.3, 1.6, 0.6 and 0.7% of cows had positive titres to leptospira serovars hardjo, pomona, canicola, icterohaemorrhagiae and grippotyphosa respectively. questionnaires completed on 110 farms revealed that 6, 2.5 and 4.6% of cows had had metritis, aborted or retained their placentas respectively in the previous 12 months. trichomonas foetus ...19846523582
the use of loglinear model to evaluate factors associated with sero-prevalence of campylobacter fetus in dairy cattle.campylobacter fetus is one of the leading infections causing bovine infertility and abortion. in a cross-sectional study, the associations of parity, herd, serological status against leptospira hardjo and haemophilus somnus with the sero-prevalence of campylobacter fetus in dairy cattle were evaluated. four hundred dairy cows from three herds were included in the study. blood samples from the cows were collected in december 1986. an enzyme-linked immunosorbant assay (elisa) was used to determine ...199016726898
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