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Claire A M Becker

Claire A M Becker
VetAgro Sup, Marcy l'Etoile, France · UMR Anses VetAgro Sup Mycoplasmoses Animales

PhD, DVM

About

26
Publications
8,271
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405
Citations
Citations since 2017
7 Research Items
247 Citations
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201720182019202020212022202301020304050
201720182019202020212022202301020304050
Introduction
Genetic diversity and antimicrobial resistance of mycoplasmas

Publications

Publications (26)
Article
Full-text available
Bovine respiratory disease (BRD) is common in calves in Algeria, but to date, Mycoplasma bovis has never been monitored as a potential etiological agent. Here, to assess the presence (direct detection) and circulation (indirect detection) of M. bovis, broncho-alveolar lavage fluids (BALF) and serum samples were collected from 60 veal calf farms in...
Article
Full-text available
Bovine respiratory diseases (BRD) are widespread in veal calf feedlots. Several pathogens are implicated, both viruses and bacteria, one of which, Mycoplasma bovis, is under-researched. This worldwide-distributed bacterium has been shown to be highly resistant in vitro to the main antimicrobials used to treat BRD. Our objective was to monitor the r...
Article
Full-text available
OIE Bulletin. Summary. Improving the quality of education for veterinary practitioners to adequately meet market demand is an urgent problem for not only the Ukrainian national education system but is also an issue of global concern. The provision of high-quality veterinary education is critical to ensuring that potential veterinarians are equi...
Article
Mycoplasma bovis is considered an emerging threat to bovine production in industrialized countries. Its control depends on good husbandry and efficient chemotherapy practices. In France, clinical isolates collected after 2009 showed a drastic loss of susceptibility to most antimicrobials when compared with isolates collected in 1978-1979. The aim o...
Article
Mycoplasma bovis induit de nombreuses infections. Les symptômes respiratoires sont peu spécifiques.
Article
Parmi les nombreuses espèces de mycoplasmes isolées chez les bovins, Mycoplasma bovis est l’espèce pathogène la plus fréquemment retrouvée en France. Ceci a été démontré grâce aux données du réseau d’épidémiosurveillance de l’Anses, Vigimyc, qui analyse les isolats qui proviennent de nombreux laboratoires. En France, M. bovis participe essentiellem...
Article
Pour mettre en évidence la présence de M. bovis en élevage lors d’un épisode aigu, un diagnostic direct est nécessaire. Au contraire, pour connaître le statut d’un troupeau vis-à-vis de l’infection par M. bovis, le diagnostic indirect avec des tests sérologiques est plutôt conseillé.
Article
Mycoplasma bovis is considered a major contributor to respiratory diseases in young cattle. Resistant M. bovis isolates have been increasingly reported worldwide due to extensive use of antimicrobials to treat bovine pneumonia. The frequency of isolates resistant to fluoroquinolones varies considerably from one country to another. The MICs of isola...
Conference Paper
PAt the end of 2012, feedbacks from the field describe severe abnormalities and a high mortimortality rate around 10% in the offspring of a Montbeliard bull. Face anomalies such as cleft lips or palate and nervous troubles were reported. A genetic disease was suspected. The aims of the study were to identify the subjects affected among the offsprin...
Article
Mycoplasma (M.) bovis has recently emerged as a major, worldwide etiological agent of bovine respiratory diseases leading to huge economic losses mainly due to high morbidity and mortality as well as poor growth rates. The spread of M. bovis infections between different animals, herds, regions or countries has been often reported to be connected to...
Conference Paper
Full-text available
A la fin de l’année 2012, les centres d’insémination rapportent un fort taux de mortinatalité d’environ 10 % dans la descendance d’un taureau de race Montbéliarde. Des déformations de la face (fente labiale et/ou palatine, figure 1a) et des troubles nerveux sont également souvent décrits. Une anomalie génétique est suspectée. Les objectifs sont d’i...
Conference Paper
Full-text available
The rtPCR assay proved to efficiently detect DNA from all Contagious Agalactia causative agents, with a satisfying limit of detection. When challenged with milk samples from farms, the rtPCR assay gave results comparable (94%) to that obtained by classical culture step. The rare discrepancies tend to prove that the DNA extraction step is critical e...
Article
Babesiosis is a tick-transmitted disease of mammalian hosts, caused by the intraerythrocytic protozoan parasites of the genus Babesia. Transmission of Babesia parasites from the vertebrate host to the tick is mediated by sexual stages, the gametocytes which are the only intraerythrocytic stages that survive and develop inside the vector. Very few d...
Article
Contagious agalactia is an important disease worldwide that affects small ruminants. Clinical manifestations vary from mastitis, pneumonia, arthritis and keratoconjunctivitis to septicemia. Four mycoplasmal etiological agents have been identified: Mycoplasma (M.) agalactiae, M. mycoides subsp. capri, M. capricolum subsp. capricolum and M. putrefaci...
Article
Full-text available
Les clostridioses des bovins sont des toxi-infections mortelles, dues à des bactéries anaérobies, sporulées, Gram positives du genre Clostridium. On peut citer le tétanos, le botulisme, la gangrène gazeuse et le charbon symptomatique. Enfin l’entérotoxémie est la plus fréquente, tuant les plus beaux animaux, en élevage intensif, d’une mort subite....
Article
Babesia divergens, a tick-borne protozoan parasite of red blood cells, is the main agent of bovine and human babesiosis in Europe. Very few data are available concerning its life cycle and sexual reproduction inside the tick vector, Ixodes ricinus. The aim of this study was to define some markers of the B.divergens sexual stage. An in silico post-g...
Article
Full-text available
To determine characteristics of natural transmission of Babesia sp. EU1 and B. divergens by adult Ixodes ricinus ticks, we examined tick salivary gland contents. We found that I. ricinus is a competent vector for EU1 and that their sporozoites directly invade erythrocytes. We conclude that EU1 is naturally transmitted by I. ricinus.
Article
Full-text available
Although Babesia divergens is the the principal confirmed zoonotic Babesia sp. in Europe, there are gaps in our knowledge of its biology and transmission by the tick Ixodes ricinus. In order to reproduce the part of the parasite cycle that occurs in the vector, an in vitro animal skin feeding technique on blood containing in vitro cultivated B. div...

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