LES CESTODES ADULTES PDF

Cestodes in four species of euryhaline stingrays from Columbia. D’un Eutetrarhynchus (Cestode Tétrarhynque) au stade pre-adulte chez us Urolophus . se transforme purement et simplement en adulte après son transfert dans l’hôte final. A l’arrière CCro Figure Cycle de développement d’un Cestode: le. remaining preserved cestodes 4 yr later, many worms were brittle and unreceptive to stain. .. Tétrarhynque) au stade pre-adulte chez us Urolophus. ( Selachii.

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Epidemiology Materials and methods Sites of collection In order to obtain adequate numbers of cestoodes from the animals, all collections were made at abattoirs. No significant change was noted on liveweight between the treated groups and the control in adult sheep ewes and rams.

Meaning of “cestode” in the French dictionary

These groups were subdivided into three age categories: Long-legged sheep and goats are found in the Sahelian regions, and the dwarf breed are found in the Sudanese region of Mali. Sudanese dwarf goats No Fasciola was recovered in these goats in the course of this investigation. Climatic data Monthly temperature and rainfall cestodess were obtained from the National Agroclimatological Office at Bamako.

Angoras in a Merino world. Sudanese dwarf goats Only two nematode species were found in significant numbers. When the two animal species were combined for statistical analysis a difference of 6 to 7 kg appeared. Age distribution and the severity of infection with gastro-intestinal parasites. The epidemiology lse nematode parasites of sheep in a high rainfall area of Zimbabwe.

CESTODE – Definition and synonyms of cestode in the French dictionary

However, this parasite is known to be of low pathogenicity Adulets, There was a relatively high prevalence of G. One explanation for the difference in worm burdens and composition in sheep and goats is that the latter they are browsers as well as grazers and, if feeding on scrub high enough, they could avoid most of the infective trichostrongyle larvae.

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Since the standard deviations were very high the differences may not be conclusive Table 2. In adulttes Sahelian sheep, T.

Bulletin of Animal Health and Production in Africa Faecal and visceral examinations from sheep and goats indicated a marked variation in the level of parasitism in livestock raised in different geographic areas. Trichostrongylus colubriformis Although the genus Trichostrongylus is considered to occur primarily in temperate regions and not thought to thrive during the warm rainy season Grant,results from this study indicate that this species may be of economic importance in sheep in Mali because it is one of the most prevalent cestoodes both in the Lex and in the Sahelian regions.

Nematodes Haemonchus contortus Heavy infections coincided with the rainy season, then progressively declined during the dry season.

The presence of nodules on viscera is of prime importance for the rural population because the infected intestines are subject to condemnation during meat inspection and are therefore lost for use as sausage casings. Each month, faeces were obtained from the rectum and submitted to a quantitative parasitological examination using the McMaster modified method.

Sahelian goats Based on post-mortem examination, the following nematodes were identified in long-legged Sahelian goats in order of predominance: No statistical analysis could be done of weight data lambs because of the low number of observations by the end of the experiment.

Weight-change analysis on sheep and goats combined. Additional data are required from the dwarf sheep in the Sudanese region to ascertain the survival mechanisms of the parasite.

Bengaly 3 and W. Further investigation is needed to assess the pathology of schistosomes in small ruminants because of increasing reports of damage that the parasite might cause in sheep Vercruysse, A quantitative evaluation of strongyle eggs was performed using the modified McMaster method.

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Trichostrongylus colubriformis, Haemonchus contortus, Strongyloides papillosus, Oesophagostonum cedtodes, Gaigeria pectinata, C. Results and discussion The following strongyle eggs reduction rates were observed following the prime anthelminthic treatment. Points of collection are shown in Figure 1. In Mali, it appears from this study that nodular form of the infection is of greater economic importance with a prevalence rate of 25 to Southern African Journal of Science Observation on the morphology and life history of Gaigeria pachyscelis, Railliet and Henry, However, conflicting results have been reported elsewhere in Africa McCulloch et al, and in Europe Le Riche et al, with different types of management.

Sahelian goats Trematodes were found with the following frequency: Therefore, the author concluded that starting in June-July-August, a new population of adult worms developed. Cestodes Cysticercus tenuicollis was widely distributed among small ruminants in Mali. McCulloch B et al. Journal of the Victoria Department of Agriculture The seasonal prevalence of inhibited development of Haemonchus contortus in sheep in Senegal.

The maximum egg count was observed between August and October with a peak in September. Dinneen J Cewtodes et al.

Studies done in Senegal Vercruysse,have shown that larvae ingested between October adults December were inhibition-prone, the adult populations resulting from the burden acquired during the previous August. To obtain data on seasonal variations in parasite populations and biology, attempts were made to make a minimum of four collections at most sites.

Parasite profiles of sheep and goats from different geographic areas of Mali. The following species were identified: Cooperia ceestodes, Cooperia punctata and C. The more common nematodes in sheep were, in order of predominance: