scholarly journals La distomatose à Madagascar. L'utilisation des molluscicides dans la lutte contre Lymnaea natalensis hovarum (hôte intermédiaire de Fasciola gigantica)

1969 ◽  
Vol 22 (3) ◽  
pp. 385
Author(s):  
Pierre Daynès
Keyword(s):  
Fasciola Gigantica ◽  
Lymnaea Natalensis

L'auteur relate 3 expériences d'utilisation de molluscicides dans le Moyen-Ouest de Madagascar pour lutter contre Lymnaea natalensis hovarum. Compte tenu des difficultés d'utilisation dues à l'écologie, il conclut que cette méthode de lutte contre la fasciolose apparaît alors comme non économique

scholarly journals Distribution and habitats of Lymnaea natalensis, snail intermediate host of the liver fluke Fasciola gigantica, in South Africa

2001 ◽  
Vol 20 (2) ◽  
pp. 56-71
Author(s):  
Editorial Office
Keyword(s):  
South Africa ◽  
Intermediate Host ◽  
Geographical Distribution ◽  
Liver Fluke ◽  
Economic Factor ◽  
Freshwater Snail ◽  
Fasciola Gigantica ◽  
Snail Intermediate Host ◽  
Planning And Construction ◽  
Lymnaea Natalensis

This paper focuses on the geographical distribution and the habitats of Lymnaea natalensis, the snail intermediate host of the liver fluke, Fasciola gigantica, as reflected by the collection sites of its 4 552 samples currently on record in the National Freshwater Snail Collection (NFSC) of South Africa. Although this species was represented in a variety of waterbodies, the majority of samples(±70%)came from rivers, brooks and dams and in 70.8% of the cases the water was described as permanent and in 71.8% as slow flowing or standing. The results of life-table studies conducted by various authors indicated that temperature should be a relatively unimportant factor in determining its geographical distribution, but that the availability of permanent water should be decisive for its presence in a given habitat. These results are in agreement with the finding that only 7.5% of the samples of this species in the NFSC were collected in habitats which were described as seasonal. Furthermore, it gives a logical explanation for the sporadic occurrence, or total absence of this species in the more arid regions of South Africa. Water impoundments and irrigation networks contribute to a large extent towards creating perennial habitats which would be suitable for L. natalensis. As intermediate host for one of the liver fluke species which already is an economic factor in South Africa, this certainly is an aspect which ought to be reckoned within the planning and construction of new irrigation schemes.

Shared Antigens between Fasciola Gigantica and its Intermediate Host , Lymnaea Natalensis

2013 ◽  
Vol 59 ◽  
pp. 133-146
Author(s):  
Hoda A. Taha ◽  
Hanan Helmy ◽  
Shadia M. El-Dafrawy
Keyword(s):  
Intermediate Host ◽  
Fasciola Gigantica ◽  
Lymnaea Natalensis

scholarly journals Inventaire des mollusques d'eau douce à Mayotte, archipel des Comores

1990 ◽  
Vol 43 (2) ◽  
pp. 173-176
Author(s):  
J. Julvez ◽  
M.A. Ali Halidi ◽  
D.S. Brown
Keyword(s):  
Fasciola Gigantica ◽  
Lymnaea Natalensis

Aucune trématodose n'est actuellement connue à Mayotte malgré les liens historiques de celle île avec sa voisine Madagascar où l'incidence de ces affections est importante. Aucun hôte intermédiaire n'y avait été décrit dans les études précédentes. Un inventaire des mollusques d'eau douce a été réalisé de 1985 à 1988 dans 53 stations durant les saisons humide et chaude : 3940 gastéropodes, appartenant à 8 espèces différentes, ont été récoltés. Seule la présence de Lymnaea natalensis constitue une nouveauté à Mayotte, portant à 14 le nombre d'espèces. Son rôle dans le cycle de transmission de Fasciola gigantica est connu, en particulier à Madagascar. L'intérêt du contrôle vétérinaire des importations de bovins peut être ainsi souligné.

scholarly journals Prolifération de mollusques et incidence sur les trématodoses dans la région du delta et du lac de Guiers après la construction du barrage de Diama sur le fleuve Sénégal

1990 ◽  
Vol 43 (4) ◽  
pp. 499-502
Author(s):  
O.T. Diaw ◽  
Georges Vassiliades ◽  
M. Seye ◽  
Y. Sarr
Keyword(s):  
Schistosoma Mansoni ◽  
Fasciola Gigantica ◽  
Biomphalaria Pfeifferi ◽  
Lymnaea Natalensis

Les dernières prospections malacologiques effectuées dans la région du delta du fleuve Sénégal, de juin 1989 à janvier 1990, ont permis de constater la prolifération rapide des mollusques Biomphalaria pfeifferi et Lymnaea natalensis, qui semblaient avoir disparu depuis 1977 alors que les populations de bulins restaient stables. Parallèlement, de nombreux cas de bilharziose intestinale humaine (Schistosoma mansoni), notamment à Richard-Toll, où on note actuellement près de 40 p. 100 de malades, et de distomatose animale (Fasciola gigantica) avec des premiers cas chez des ovins, ont été enregistrés. Cette nouvelle situation épidémiologique est une des premières conséquences de la mise en service, en 1986, du barrage de Diama, à l'embouchure du fleuve Sénégal. Il a créé des conditions écologiques favorables au développement des mollusques.

scholarly journals Associations between trematode infections in cattle and freshwater snails in highland and lowland areas of Iringa Rural District, Tanzania

Parasitology ◽  
2015 ◽  
Vol 142 (11) ◽  
pp. 1430-1439 ◽  
Author(s):  
JAHASHI NZALAWAHE ◽  
AYUB A. KASSUKU ◽  
J. RUSSELL STOTHARD ◽  
GERALD C. COLES ◽  
MARK C. EISLER
Keyword(s):  
Fasciola Gigantica ◽  
Rural District ◽  
Water Bodies ◽  
Freshwater Snails ◽  
Infection Rates ◽  
Biomphalaria Pfeifferi ◽  
Melanoides Tuberculata ◽  
Schistosoma Bovis ◽  
Trematode Infections ◽  
Lymnaea Natalensis

SUMMARYThe epidemiology of trematode infections in cattle was investigated within highland and lowland areas of Iringa Rural District, in southern Tanzania. Fecal samples were collected from 450 cattle in 15 villages at altitudes ranging from 696 to 1800 m above the sea level. Freshwater snails were collected from selected water bodies and screened for emergence of cercariae. The infection rates in cattle wereFasciola gigantica28·2%, paramphistomes 62·8% andSchistosoma bovis4·8%. Notably, prevalence of trematode infections in cattle was much higher in highland (altitude > 1500 m) as compared with lowland (altitude < 1500 m) areas and was statistically significant (P-value = 0·000) forF. giganticaand paramphistomes but not forS. bovis. The snails collected includedLymnaea natalensis, Bulinus africanus, Bulinus tropicus, Bulinus forskali, Biomphalaria pfeifferi, Melanoides tuberculataandBellamya constrictawith a greater proportion of highland (75%) than lowland (36%) water bodies harbouring snails. Altitude is a major factor shaping the epidemiology ofF. giganticaand paramphistomes infections in cattle in Iringa Rural District with greater emphasis upon control needed in highland areas.

Lymnaea natalensis laboratory culture and production of Fasciola gigantica metacercariae

Parasitology ◽  
1968 ◽  
Vol 58 (3) ◽  
pp. 653-656 ◽  
Author(s):  
P. K. Bitakaramire
Keyword(s):  
Laboratory Culture ◽  
Fasciola Gigantica ◽  
The Mean ◽  
Veterinary Hospital ◽  
Lymnaea Natalensis

A method of breeding and maintaining L. natalensis cultures in the laboratory is described.The infection of snails with F. gigantica miracidia and the collection of metacercariae is discussed. The mean number of metacercariae arising from cercariae produced by each snail was 652·6, over a period of 8·2 days.It is shown that after 3 months storage F. gigantica metacercariae are still viable when excysted in vitro by using artificial pepsin and trypsin enzymes.The author wishes to express his thanks to Dr G. M. Urquhart of the Wellcome Laboratories for Experimental Parasitology, University of Glasgow, Veterinary Hospital, Bearsden Road, Bearsden, Glasgow, who has read through this paper and made the necessary corrections.

scholarly journals Verspreiding en habitats van Lymnaea natalensis, tussengasheerslak van die lewerbot Fasciola gigantica, in Suid-Afrika

2001 ◽  
Vol 20 (2) ◽  
pp. 49-53 ◽  
Author(s):  
K. N. De Kock ◽  
C. T. Wolmarans ◽  
H. D. Strauss ◽  
M. Killian
Keyword(s):  
South Africa ◽  
Intermediate Host ◽  
Geographical Distribution ◽  
Liver Fluke ◽  
Economic Factor ◽  
Freshwater Snail ◽  
Fasciola Gigantica ◽  
Snail Intermediate Host ◽  
Planning And Construction ◽  
Lymnaea Natalensis

Hierdie artikel fokus op die geografiese verspreiding en die habitats van Lymnaea natalensis, die slaktussengasheer van die lewerbot, Fasciola gigantica, soos gereflekteer deur die vindplekke van sy 4 552 monsters wat tans in die Nasionale Varswaterslakversameling (NVV) van Suid-Afrika op rekord is. Alhoewel hierdie spesie in’n verskeidenheid van waterliggame aangetref is, was die meerderheid van die monsters (±70%) afkomstig vanuit riviere, spruite en damme en is die water in 70.8% van die gevalle as standhoudend en in 71.8% van die gevalle as stadigvloeiend, of staande beskryf.  Die resultate van lewenstabeleksperimente deur verskeie outeurs het daarop gedui dat temperatuur ’n minder belangrike bepalende faktor in sy geografiese verspreiding blyk te wees, maar dat die beskikbaarheid van standhoudende water deurslaggewend vir sy voorkoms in ’n gegewe habitat mag wees. Hierdie resultate strook met die bevinding dat slegs 7.5% van die monsters van hierdie spesie in die NVV in habitats wat as seisoenaal beskryf is, versamel is. Verder bied dit’n logiese verklaring vir die sporadiese voorkoms, of totale afwesigheid van hierdie spesie in die droër streke van Suid-Afrika.  Opgaardamme en besproeiingsnetwerke dra grootliks by tot die skepping van permanente habitats wat geskik sou wees vir L. natalensis.  As tussengasheer vir een van die lewerbotspesies wat reeds ’n ekonomiese faktor in Suid-Afrika is, is dit ’n aspek waarmee beslis rekening gehou behoort te word in die beplanning en konstruksie van nuwe besproeiingsprojekte.AbstractDistribution and habitats of Lymnaea natalensis, snail intermediate host of the liver fluke Fasciola gigantica, in South Africa This paper focuses on the geographical distribution and the habitats of Lymnaea natalensis, the snail intermediate host of the liver fluke, Fasciola gigantica, as reflected by the collection sites of its 4 552 samples currently on record in the National Freshwater Snail Collection (NFSC) of South Africa.  Although this species was represented in a variety of waterbodies, the majority of samples (±70%) came from rivers, brooks and dams and in 70.8% of the cases the water was described as permanent and in 71.8% as slow flowing or standing.  The results of life-table studies conducted by various authors indicated that temperature should be a relatively unimportant factor in determining its geographical distribution, but that the availability of permanent water should be decisive for its presence in a given habitat.  These results are in agreement with the finding that only 7.5% of the samples of this species in the NFSC were collected in habitats which were described as seasonal.  Furthermore, it gives a logical explanation for the sporadic occurrence, or total absence of this species in the more arid regions of South Africa. Water impoundments and irrigation networks contribute to a large extent towards creating perennial habitats which would be suitable for L. natalensis.  As intermediate host for one of the liver fluke species which already is an economic factor in South Africa, this certainly is an aspect which ought to be reckoned with in the planning and construction  of new irrigation schemes.

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