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Papers by Jean-Michel Reperant
HAL (Le Centre pour la Communication Scientifique Directe), Oct 5, 2022
HAL (Le Centre pour la Communication Scientifique Directe), Mar 30, 2022
HAL (Le Centre pour la Communication Scientifique Directe), 2018
HAL (Le Centre pour la Communication Scientifique Directe), Jun 21, 2022
Journal of Parasitology
BioOne Complete (complete.BioOne.org) is a full-text database of 200 subscribed and open-access t... more BioOne Complete (complete.BioOne.org) is a full-text database of 200 subscribed and open-access titles in the biological, ecological, and environmental sciences published by nonprofit societies, associations, museums, institutions, and presses.
National audienceEimeria kofoidi, E. caucasica et E. legionensis were identified in droppings of ... more National audienceEimeria kofoidi, E. caucasica et E. legionensis were identified in droppings of red-legged partridges (Alectoris rufa). For every Eimeria species, oocysts were isolated and propagated in 14-day-old partridges raised in isolator to obtain pure strains. Oocysts showed certain morphological characteristics which allowed differentiating them according to their shape, size, wall and oocyst content. In bird, intestinal lesions were also characteristic of the Eimeria species: E. kofoidi invaded duodenal loop and jejunum and could spread down to the ileum. Lesions looked like those of E. acervulina in chicken. E. caucasica colonized also the proximal intestine and ileum and reminded by the intestinal ballooning, petechiae on the serosal surface of the intestine E. maxima (chicken) and by false membranes E. meleagrimitis (turkey). E. legionensis colonized caeca and reminded of E. adenoeides in turkey. Pathogenicity was studied in young partridges. Single infections with incr...
Les cahiers de la Recherche. Santé, Environnement, Travail, Oct 1, 2013
HAL (Le Centre pour la Communication Scientifique Directe), 2019
Additional file 3. Data supporting conclusions regarding impact of study variables on OPG counts.
Additional file 1. Additional photos of intestinal lesions. Folder with 47 additional photos in J... more Additional file 1. Additional photos of intestinal lesions. Folder with 47 additional photos in JPG format illustrating turkeys with intestinal lesions that were assigned to scores 0, 1, 2 or 3.
Journal of Parasitology, 2021
Recurrent coccidiosis affecting a commercial chukar partridge (Alectoris chukar) farm in Ontario,... more Recurrent coccidiosis affecting a commercial chukar partridge (Alectoris chukar) farm in Ontario, Canada was investigated. The responsible pathogenic Eimeria species was isolated for biological characterization. The uniformity of oocyst morphometrics supported that only a single Eimeria sp. was present. Experimental infections with coccidia-free chukars were used to describe exogenous and endogenous developmental stages of the parasite. The prepatent period of the causative Eimeria species was 5 days and patency lasted 11 days; fecundity was 1,573 to 30,057, with the highest fecundity recorded with the lowest challenge dose. Endogenous development was elucidated histologically from samples collected at 8 locations along the intestinal tract at 26 time points throughout prepatency. The parasite had 5 asexual generations before oocyst formation that were located from the mid-jejunum to the mid-rectum and in the ceca. Sporulation of oocysts suspended in potassium dichromate at room temperature (22 C) occurred within 24 hr. Oocysts (n = 50) averaged 21.8 by 18.6 μm and featured a polar granule; sporocysts (n = 50) averaged 10.9 by 7.1 μm and possessed a Stieda body, sub-Stieda body, sporozoite refractile bodies, and sporocyst residuum. Comparisons with described Eimeria spp. infecting partridges suggest that the biological features of this pathogenic species are unique; similarly, sequences from both mitochondrial and nuclear loci support the naming of this new Eimeria species.
Livestock Production Science, 2003
ABSTRACT Internal parasite control practices and helminth infestations were investigated in 78 pi... more ABSTRACT Internal parasite control practices and helminth infestations were investigated in 78 pig farms in France. Pooled faecal samples were taken from pens housing 16-week-old pigs. Samples were examined by coproscopy. Farm practices were checked for the risk factors of infestation previously described in literature. Information was obtained during a visit of the facilities and an interview with the farm owner/manager. Anthelmintics were used in most herds (97%). Treatments were routinely prescribed, such as flubendazole in the diet of the piglets and ivermectin for sows. Finisher pig infestation may occur despite these treatments: five samples in our study contained helminth eggs, four samples contained strongylid eggs (Hyostrongylus rubidus or Oesophagostomum spp.), and one sample contained Trichuris suis eggs. We can conclude that helminths are controlled, but that parasites can still be present in indoor intensive pig operations. Hygiene efforts must be continued.
HAL (Le Centre pour la Communication Scientifique Directe), Oct 5, 2022
HAL (Le Centre pour la Communication Scientifique Directe), Mar 30, 2022
HAL (Le Centre pour la Communication Scientifique Directe), 2018
HAL (Le Centre pour la Communication Scientifique Directe), Jun 21, 2022
Journal of Parasitology
BioOne Complete (complete.BioOne.org) is a full-text database of 200 subscribed and open-access t... more BioOne Complete (complete.BioOne.org) is a full-text database of 200 subscribed and open-access titles in the biological, ecological, and environmental sciences published by nonprofit societies, associations, museums, institutions, and presses.
National audienceEimeria kofoidi, E. caucasica et E. legionensis were identified in droppings of ... more National audienceEimeria kofoidi, E. caucasica et E. legionensis were identified in droppings of red-legged partridges (Alectoris rufa). For every Eimeria species, oocysts were isolated and propagated in 14-day-old partridges raised in isolator to obtain pure strains. Oocysts showed certain morphological characteristics which allowed differentiating them according to their shape, size, wall and oocyst content. In bird, intestinal lesions were also characteristic of the Eimeria species: E. kofoidi invaded duodenal loop and jejunum and could spread down to the ileum. Lesions looked like those of E. acervulina in chicken. E. caucasica colonized also the proximal intestine and ileum and reminded by the intestinal ballooning, petechiae on the serosal surface of the intestine E. maxima (chicken) and by false membranes E. meleagrimitis (turkey). E. legionensis colonized caeca and reminded of E. adenoeides in turkey. Pathogenicity was studied in young partridges. Single infections with incr...
Les cahiers de la Recherche. Santé, Environnement, Travail, Oct 1, 2013
HAL (Le Centre pour la Communication Scientifique Directe), 2019
Additional file 3. Data supporting conclusions regarding impact of study variables on OPG counts.
Additional file 1. Additional photos of intestinal lesions. Folder with 47 additional photos in J... more Additional file 1. Additional photos of intestinal lesions. Folder with 47 additional photos in JPG format illustrating turkeys with intestinal lesions that were assigned to scores 0, 1, 2 or 3.
Journal of Parasitology, 2021
Recurrent coccidiosis affecting a commercial chukar partridge (Alectoris chukar) farm in Ontario,... more Recurrent coccidiosis affecting a commercial chukar partridge (Alectoris chukar) farm in Ontario, Canada was investigated. The responsible pathogenic Eimeria species was isolated for biological characterization. The uniformity of oocyst morphometrics supported that only a single Eimeria sp. was present. Experimental infections with coccidia-free chukars were used to describe exogenous and endogenous developmental stages of the parasite. The prepatent period of the causative Eimeria species was 5 days and patency lasted 11 days; fecundity was 1,573 to 30,057, with the highest fecundity recorded with the lowest challenge dose. Endogenous development was elucidated histologically from samples collected at 8 locations along the intestinal tract at 26 time points throughout prepatency. The parasite had 5 asexual generations before oocyst formation that were located from the mid-jejunum to the mid-rectum and in the ceca. Sporulation of oocysts suspended in potassium dichromate at room temperature (22 C) occurred within 24 hr. Oocysts (n = 50) averaged 21.8 by 18.6 μm and featured a polar granule; sporocysts (n = 50) averaged 10.9 by 7.1 μm and possessed a Stieda body, sub-Stieda body, sporozoite refractile bodies, and sporocyst residuum. Comparisons with described Eimeria spp. infecting partridges suggest that the biological features of this pathogenic species are unique; similarly, sequences from both mitochondrial and nuclear loci support the naming of this new Eimeria species.
Livestock Production Science, 2003
ABSTRACT Internal parasite control practices and helminth infestations were investigated in 78 pi... more ABSTRACT Internal parasite control practices and helminth infestations were investigated in 78 pig farms in France. Pooled faecal samples were taken from pens housing 16-week-old pigs. Samples were examined by coproscopy. Farm practices were checked for the risk factors of infestation previously described in literature. Information was obtained during a visit of the facilities and an interview with the farm owner/manager. Anthelmintics were used in most herds (97%). Treatments were routinely prescribed, such as flubendazole in the diet of the piglets and ivermectin for sows. Finisher pig infestation may occur despite these treatments: five samples in our study contained helminth eggs, four samples contained strongylid eggs (Hyostrongylus rubidus or Oesophagostomum spp.), and one sample contained Trichuris suis eggs. We can conclude that helminths are controlled, but that parasites can still be present in indoor intensive pig operations. Hygiene efforts must be continued.