Données complémentaires sur les organites argyrophiles superficiels du miracidium et de la cercaire de <i>Fasciola gigantica</i> (Cobbold, 1855) (Trematoda : Fasciolidae) et sur l’épidémiologie de ce parasite

Albaret, J.-L.; Bayssade-Dufour, Ch.; Diaw, O. T.; Vassiliades, Georges; Gruner, L.

doi:10.1051/parasite/1980555541

Cited by 3 publications

(1 citation statement)

References 7 publications

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“…Sur un total de 150 limnées récoltées dans trois sites, une infestation globale de 15 p. 100 a été relevée avec F. gigantica (1). De même des Bulinus truncatus (25 sur 100) étaient porteurs de cercaires de paramphistomes identifiées comme étant Paramphistomum phillerouxi (2,13).…”

Section: Situation Après La Mise En Service Des Barragesunclassified

Extension des trématodoses du bétail après la construction des barrages dans le bassin du fleuve Sénégal

Diaw¹,

Vassiliades

Thiongane³

et al. 1998

Rev. Elev. Med. Vet. Pays Trop.

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Après la mise en service du barrage de Diama (1985-86) et la multiplication des aménagements hydro-agricoles, il a été constaté au niveau du bassin du fleuve Sénégal un développement des trématodoses animales, particulièrement la fasciolose à Fasciola gigantica, les schistosomoses à Schistosoma bovis et à S. curassoni et la paramphistomose à Paramphistomum sp. Cette situation épidémiologique des trématodoses chez le bétail s'est manifestée par une augmentation des prévalences au niveau d'anciens foyers (Richard-Toll, Ross-Béthio, Mbane et Keur Momar Sarr). Les taux d'infestation chez les bovins sont passés de 11 à 27 %, de 20 à 30 % et de 15 à 27 % respectivement pour la fasciolose, la paramphistomose et la schistosomose. Chez les petits ruminants qui semblaient être épargnés, des prévalences de 2 à 62 % pour la fasciolose ont été enregistrées, alors que la paramphistomose, plus fréquente, avait un taux de 25 à 30 %. Parallèlement, à partir de 1989-1990 de nouveaux foyers de trématodoses sont apparus : d'une part, au niveau du delta à Tilène, Pont Gendarme et Takhembeut avec des prévalences de 3 à 20 %, 4 à 20 % et 5 à 36 % respectivement pour fa fasciolose, la schistosomose et la paramphistomose ; d'autre part, au niveau du lac de Guiers à Temeye, Thiago et Senda avec des prévalences de 5 à 86 %, 5 à 11 % et 5 à 33 % respectivement pour la fasciolose, la schistosomose et la paramphistomose.

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Section: Situation Après La Mise En Service Des Barragesunclassified

Extension des trématodoses du bétail après la construction des barrages dans le bassin du fleuve Sénégal

Diaw¹,

Vassiliades

Thiongane³

et al. 1998

Rev. Elev. Med. Vet. Pays Trop.

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Diagnostic value of a miracidium in urinary sediment

et al. 1999

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Although rarely encountered in the United States, urinary tract schistosomiasis occurs commonly in many countries in the eastern hemisphere. Travel and immigration may contribute to imported cases of schistosomiasis. Excessive morbidity and increased mortality, including the development of urinary‐tract squamous‐cell carcinoma, are associated with untreated Schistosoma haematobium infection. Therefore, in the appropriate clinical context, all efforts should be made to rule out infectious and readily treatable causes of chronic hematuria. The presence of characteristic eggs in the urinary sediment is the usual means of diagnosing a S. haematobium infection. Additionally, the small and less commonly encountered miracidium stage of S. haematobium may also be present in the urine, which is another means of diagnosing urinary tract schistosomiasis. The present report describes a case in which a miracidium was detected in a fresh, unstained urine specimen. As detection of miracidia can be made in specimens also processed by routine cytologic methods, it behooves cytologists to be aware of this entity for the diagnosis of schistosomiasis. Diagn. Cytopathol. 1999;20:34–37. © 1999 Wiley‐Liss, Inc.

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Fasciola Gigantica: the parasite burden inLymnaea natalensisthat died after a cercarial shedding

Dreyfuss¹,

Costa²,

Rakotondravao³

et al. 1995

Parasite

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Summary :Histological studies were carried out in Lymnaea natalensis to determi ne why the number of Fasciola gigantica cercariae decreased when the patent period duration increased. Observations were performed in snails killed between days 30 and 1 35 after exposure, and in snails that died following a cercarial shedding between days 53 and 172 after exposure (at 23 °C). Free and degenerated rediae became increasingly numerous as experi ment duration increased; they represented 60 % and more of the redial burden after day 135. Free and degenerated cercariae i ncreased in numbers after day 75, and predomi nated in older snails. Several studies have already been carried out on the cercarial shedding of Fasciola gigantica from the snail Lymnaea natalensis (Albaret et al., 1980 ; Cheruiyot and Wamae, 1990). Cercariae are shed during the patent period, however, the number of these larvae per snail and per day was progressi vely reduced when the life span of infected snails increased (Da Costa et al., 1994). From these data, the question arises to know what happens in these infec ted L. natalensis. To answer this question, we perfor med an experimental infection of L. natalensis by F. gigantica, and a comparative histological study bet ween snails killed at regular intervals and those that died following the last cercarial shedding.The colony of L. natalensis originated from Ambanidia and Vohisarika, in the province of Tananarive (Madagascar). The adults were transpor ted to France and placed in covered aquaria (at 23 °C) where they laid eggs. These eggs provided the 4-mm snails that were used in the experiment. The F. gigantica eggs were collected regularly at the slaugh ter-house of Tananarive (Madagascar) from the gall-

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Données complémentaires sur les organites argyrophiles superficiels du miracidium et de la cercaire de Fasciola gigantica (Cobbold, 1855) (Trematoda : Fasciolidae) et sur l’épidémiologie de ce parasite

Cited by 3 publications

References 7 publications

Extension des trématodoses du bétail après la construction des barrages dans le bassin du fleuve Sénégal

Extension des trématodoses du bétail après la construction des barrages dans le bassin du fleuve Sénégal

Diagnostic value of a miracidium in urinary sediment

Fasciola Gigantica: the parasite burden inLymnaea natalensisthat died after a cercarial shedding

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