Aspects of the Maintenance of the Life Cycle of Fasciola hepatica in Lymnaea columella in Minas Gerais, Brazil

Souza, Cecília Pereira de; Magalhães, Kelly Grace; Passos, Liana Konovaloff Jannotti; Santos, Glaucia Cristina Pereira dos; Ribeiro, Fábio; Katz, Naftale

doi:10.1590/s0074-02762002000300023

Cited by 20 publications

(12 citation statements)

References 11 publications

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“…These data corroborate other authors' observations (BORAY, 1996;SOUZA et al, 2002), with spontaneous elimination of cercariae at close to 60 days post-infection.…”

Section: Resultssupporting

confidence: 93%

Autochthonous infection of buffaloes and cattle by Fasciola hepatica in Minas Gerais, Brazil

Dracz

Lima

2014

Rev. Bras. Parasitol. Vet.

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Fasciola hepatica is a digenetic trematode that parasitizes the bile ducts of different species of vertebrate hosts. In Brazil, this parasitosis is expanding and occurrences have been reported in the southern, southeastern, central-western and northeastern regions. This study aimed to report the first case of naturally infection of buffaloes by this parasite in the state of Minas Gerais. A total of 250 stool samples, 176 from cattle and 74 from buffaloes, from the districts of São José da Lapa and Pedro Leopoldo, were examined. Also, 402 snails of the genus Lymnaea were collected on the same farms and the viability of the eggs from naturally infected buffaloes and cattle and the susceptibility of the snails to infection were tested. A total of 54 animals were found to be positive, 33 cattle (18.75%) and 21 buffaloes (28.37%), and two molluscs showed immature forms of F. hepatica. In experimental infection of specimens of Lymnaea, cercariae were obtained through spontaneous elimination from the 57 th day post-infection onwards. The importance of this first case report can be emphasized because it confirms that this parasite is being dispersed in municipalities in this state that had previously been considered to be unaffected.Keywords: Fasciola hepatica, buffaloes, epidemiology, cattle. ResumoFasciola hepatica é um trematódeo digenético que parasita os ductos hepáticos de diferentes espécies de hospedeiros vertebrados. No Brasil, essa parasitose encontra-se em expansão e a sua ocorrência tem sido descrita nas regiões Sul, Sudeste, Centro-oeste e Nordeste. Esse trabalho objetivou relatar o primeiro caso de búfalos naturalmente infectados no estado de Minas Gerais. Um total de 250 amostras de fezes, sendo 176 de bovinos e 74 de búfalos, provenientes dos municípios de São José da Lapa e Pedro Leopoldo foram examinadas. Também foram coletados 402 moluscos do gênero Lymnaea nas propriedades estudadas e a viabilidade dos ovos oriundos dos búfalos e bovinos naturalmente infectados e a susceptibilidade do molusco a infecção foi testada. Um total de 54 animais apresentavam-se positivos sendo 33 bovinos (18,75%) e 21 bubalinos (28,37%) e dois moluscos apresentaram formas imaturas de F. hepatica. Na infecção experimental dos exemplares de Lymanea, foram obtidas cercarias eliminadas espontaneamente a partir do 57º dia pós infecção. Ressalta-se a importância desse primeiro relato de caso, pois certifica a dispersão do parasito em municípios antes considerados indenes no Estado.

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“…These data corroborate other authors' observations (BORAY, 1996;SOUZA et al, 2002), with spontaneous elimination of cercariae at close to 60 days post-infection.…”

Section: Resultssupporting

confidence: 93%

Autochthonous infection of buffaloes and cattle by Fasciola hepatica in Minas Gerais, Brazil

Dracz

Lima

2014

Rev. Bras. Parasitol. Vet.

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“…For parasitological analysis, snails were placed in plastic vials containing dechlorinated water and exposed to artificial light for at least 2 hours to stimulate the shedding of F. hepatica cercariae (Souza et al 2002).…”

Section: Snail Collection and Analysesmentioning

confidence: 99%

New record forGalba neotropica(d'Orbigny, 1835) in Argentina, with a detailed analysis of its morphology and molecular characteristics

et al. 2015

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2015): New record for Galba neotropica (d'Orbigny, 1835) in Argentina, with a detailed analysis of its morphology and molecular characteristics, Molluscan Research, We report for the first time the presence of Galba neotropica in Santa Fe province, Pampean Argentina. Until the present work, the identity of the intermediate host of Fasciola hepatica in this region, the most important livestock production area of Argentina, was unknown. This report extends the geographic distribution of G. neotropica and is the first to provide molecular and morphological information on this species in Argentina. During summer 2013, snails were collected on private livestock farms with high prevalence of fasciolosis in cattle. Specimens were identified by using the nuclear sequences of the internal transcribed spacers ITS-1 and ITS-2, the shell and the shape and size of the male reproductive organs. Molecularly, ITS-1 and ITS-2 nuclear sequences exhibit 100% nucleotide identity with G. neotropica from Lima, Peru. Morphologically, G. neotropica from Santa Fe province was indistinguishable from Galba viatrix and Galba cubensis, the other two cryptic species within this South American group of lymnaeids. The combination of molecular and morphological analyses is strongly recommended to identify lymnaeids at species level. The identity of the intermediate host and the subsequent knowledge of its susceptibility, behaviour, distribution, ecology and biology are important components in developing effective measures to control fasciolosis.

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“…Lymnaea cailliaudi, Bulinus truncatus and Biomphalaria alexandrina egg masses were collected from the aquarium of the field collected snails and transferred to another separate one where they were reared [17]. Similarly; large numbers of L. truncatula were collected from a site at the end of El-Mansoryea drain near Kerdasa, Giza and established in the laboratory as above.…”

Section: Laboratory Breeding Of Snails For Experimental Infectionmentioning

confidence: 99%

Contributions on human fascioliasis and its snail intermediate host in Nile Delta, Egypt

El-Bahy

Mahgoub

Taher

2014

International Journal of Basic and Applied Sciences

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The present study spotted some light on human fascioliasis in Kafr El-Sheikh Governorate in the west of the Nile Delta in Egypt, its species, its intermediate host (IMH) snail and tried to answer previous questions about development of Fasciola (F.) species in new snail hosts other than that known for animal fascioliasis in Egypt. The study recorded a percentage of infection by Fasciola eggs reached up to 6.02% in 1810 randomly collected human stool samples from 6 climatically selected sites in this governorate using fluke-finder technique. The incidence was high in Sedi Salem and Motobus than in the other study sites. Micrometry measuring of 100 eggs from each locality showed that egg size cannot be used as a main criterion in differentiation between F. hepatica and gigantica. Wide range of egg size varied between 130-162.5 µ X 75-87.5 µ with a mean length and width of 144.24 ± 11.33 µ X 80± 6.55µ, was recorded. Upon dissection of 1972 Lymnaea (L.) cailliaudi, 268 L. alexandrina, 502 Bulinus species, 11316 Biomphalaria alexandrina, 1398 Cleopatra species, 8520 Physa acuta, 420 Melania tuberculata, 2132 Vivipara (Bellamya) unicolar, 144 Neritina nilotica and 1570 Planorbis philippi, Fasciola parthenitae were not detected in snails other than L. cailliaudi (the known IMH of Fasciola in Egypt). The results proved that there is no accommodation has occurred in any of the surrounding snails to transmit Fasciola to man. The present study proved that human fascioliasis in the study sites was due to Fasciola gigantica not F. hepatica. This appeared in its tendency to develop in L. cailliaudi not in other tested snails with successive radial generations as that described previously for F. gigantica. Moreover, early mature flukes extracted from laboratory infected rabbits by the produced encysted metacercariae had the characteristic features described previously for F. gigantica.

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Aspects of the Maintenance of the Life Cycle of Fasciola hepatica in Lymnaea columella in Minas Gerais, Brazil

Cited by 20 publications

References 11 publications

Autochthonous infection of buffaloes and cattle by Fasciola hepatica in Minas Gerais, Brazil

Autochthonous infection of buffaloes and cattle by Fasciola hepatica in Minas Gerais, Brazil

New record forGalba neotropica(d'Orbigny, 1835) in Argentina, with a detailed analysis of its morphology and molecular characteristics

Contributions on human fascioliasis and its snail intermediate host in Nile Delta, Egypt

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