| the role of amblyomma variegatum in the transmission of heartwater with special reference to guadeloupe. | heartwater has been diagnosed in guadeloupe, marie-galante, and antigua; it induces important losses among goats and european or cross-bred cattle when local zebu creole are highly resistant to infection. amblyomma variegatum is the vector of the disease in the caribbean. the tick strain of martinique, occurring in that island that has apparently been disease-free since 1948, has not lost its ability to experimentally transmit the disease. in guadeloupe 97% of nymphs and nearly 100% of adults fe ... | 1992 | 1626882 |
| footprints of selection in the ancestral admixture of a new world creole cattle breed. | admixed populations represent attractive biological models to study adaptive selection. originating from several waves of recent introduction from european (eut), african (aft) and zebus (zeb) cattle, new world creole cattle allow investigating the response to tropical environmental challenges of these three ancestries. we here provide a detailed assessment of their genetic contributions to the creole breed from guadeloupe (cgu). we subsequently look for footprints of selection by combining resu ... | 2011 | 21689193 |
| selection assisted by a bola-dr/dq haplotype against susceptibility to bovine dermatophilosis. | bovine dermatophilosis is a severe skin infection of tropical ruminants inducing a severe loss in productivity and a 15% mortality rate. this disease is caused by the actinomycete bacterium dermatophilus congolensis associated with the tick amblyomma variegatum. currently there are no prospects for a vaccine, and acaricide or antibiotic control is hampered by the development of chemoresistance. animal breeders have observed that dermatophilosis susceptibility seems to be determined genetically, ... | 2003 | 12927091 |
| characterization of 18 new bola-drb3 alleles. | the second exon of the bovine mhc class ii drb3 gene was amplified by polymerase chain reaction (pcr) from dna samples of 568 zebu brahman cattle (bos indicus) from martinique (french west indies). cloning of these pcr products allowed the isolation of both alleles from each animal, which were characterized by the pcr-restriction fragment length polymorphism (rflp) technique using the restriction enzymes rsai, bstyi and haeiii. four new pcr-rflp patterns were obtained by digestion with rsai. the ... | 1999 | 10442982 |
| an amino acid sequence coded by the exon 2 of the bola drb3 gene associated with a bola class i specificity constitutes a likely genetic marker of resistance to dermatophilosis in brahman zebu cattle of martinique (fwi). | one hundred and twenty-seven brahman cattle from several locations in martinique (fwi), reared under different environmental conditions, were followed over three years and checked for clinical signs of dermatophilosis. to confirm that these animals had been in contact with the pathogen dermatophilus congolensis, their sera were tested by elisa. on the basis of this epidemiological study, 12 animals were classified as resistant (seropositive without clinical signs), belonging to herds in which th ... | 1996 | 8784500 |
| observations on a dermatophilosis outbreak in brahman cattle in guadeloupe. description, epidemiological and economical aspects. | a severe outbreak of dermatophilosis occurred in 1985 in a herd of brahman cows imported from martinique in guadeloupe in july 1983. little was known on this disease in guadeloupe until then, for the local zebu breed is naturally highly resistant to diseases transmitted by ticks or associated with them. conditions of appearance and development of the disease were studied in relation with herd management, climate and treatments applied. there was no evidence of the disease during the first 6 mont ... | 1993 | 8134645 |
| an attempt to identify genetic markers of resistance or susceptibility to dermatophilosis in the zebu brahman population of martinique. | dermatophilosis is a disease associated with the tick amblyomma variegatum, and a genetic predisposition to the manifestation of symptoms has been demonstrated. indeed, the creole cattle of guadeloupe constitute a population which is highly resistant to this disease, whereas the brahman zebu cattle of martinique seem very susceptible. however, in this brahman population there is a gradient regarding the severity of symptoms depending on individuals. in several herds of these pure zebu brahman, k ... | 1993 | 8134644 |
| an attempt to correlate cattle breed origins and diseases associated with or transmitted by the tick amblyomma variegatum in the french west indies. | by using biological data and historical research, we have tried to explain the difference between resistance and susceptibility to the diseases transmitted (cowdriosis) or associated (dermatophilosis) with the tick amblyomma variegatum, in two cattle breeds of the french west indies: the creole crossbred cattle of guadeloupe and the brahman zebu cattle of martinique. have been studied the polymorphisms of 5 independent genetic systems (erythrocytic haemoglobin, serum albumin and transferrin, the ... | 1993 | 8134643 |