نتایج جستجو برای: intermediate host snails

تعداد نتایج: 342663  

Journal: :Proceedings. Biological sciences 2009
Pieter T J Johnson Peder J Lund Richard B Hartson Timothy P Yoshino

Global biodiversity loss and disease emergence are two of the most challenging issues confronting science and society. Recently, observed linkages between species-loss and vector-borne infections suggest that biodiversity may help reduce pathogenic infections in humans and wildlife, but the mechanisms underlying this relationship and its applicability to a broader range of pathogens have remain...

Journal: :Experimental parasitology 2011
Jean-François Allienne André Théron Benjamin Gourbal

Detailed studies of host/parasite interactions are currently limited because in situ gene sequencing or monitoring of parasite gene expression is so far limited to genes presenting a high loci copy number in the Schistosome genome or a high level of expression. Indeed, how to investigate the host parasite molecular interplay when parasites are not directly accessible in vivo? Here we describe a...

Journal: :avicenna journal of clinical microbiology and infection 0
rouhollah valipour nouroozi department of parasitology, medical school, ahvaz jundishapur university of medical sciences, ahvaz, ir iran; medical school, ahvaz jundishapur university of medical sciences, ahvaz, ir iran. tel: +98-6133332036; +98-9165846379, fax: +986133332036

conclusions the reason for difference in the detected snail genera in sampling sites may be due to various physicochemical factors. according to the current study, medically important snails exist in miangran lake and they could be a source of trematode infections for the local people. controlling measures after comprehensive studies should be applied. background some freshwater snails are acti...

Journal: :Parasitology 2005
E P Levri J Dillard T Martin

Parasitism often influences the phenotype of individuals. Many of the resulting changes are due to changes in resource allocation that come with infection. Here we examine the effect of a trematode parasite on the shape and defence morphology of a New Zealand freshwater snail, Potamopyrgus antipodarum. The trematode Microphallus sp. asexually produces hundreds of metacercarial cysts in the snai...

2015
Stephen W. Attwood Motomu Ibaraki Yasuhide Saitoh Naoko Nihei Daniel A. Janies Joanne P. Webster

BACKGROUND Schistosoma japonicum causes major public health problems in China and the Philippines; this parasite, which is transmitted by freshwater snails of the species Oncomelania hupensis, causes the disease intestinal schistosomiasis in humans and cattle. Researchers working on Schistosoma in Africa have described the relationship between the parasites and their snail intermediate hosts as...

بهداشت منصوریان, الله, صالحی, میترا, محمودی, محمود, مولوی, غلامرضا, پورشجاعی, رشید,

Background and Aim: The role of fresh water snails as the intermediary host in transmitting parasitic infestations in man and animals is well known. In Iran, urinary schistosomisasis is known to be endemic in the Khuzestan Province, south-west of the country. Considering the Egyptian experience concerning the negative effects of Aswan Dam construction on expanding the prevalence of human bilhar...

2016
Kulwadee Suwannatrai Apiporn Suwannatrai Pairat Tabsripair Jariya Umka Welbat Sirikachorn Tangkawattana Cinzia Cantacessi Jason Mulvenna Smarn Tesana Alex Loukas Javier Sotillo

Bithynia siamensis goniomphalos is a freshwater snail that serves as the first intermediate host of the human liver fluke Opisthorchis viverrini. This parasite is a major public health problem in different countries throughout the Greater Mekong sub-region (Thailand, southern Vietnam, Lao PDR and Cambodia). Chronic O. viverrini infection also results in a gradual increase of fibrotic tissues in...

2013
Otto Seppälä Anssi Karvonen Marja Kuosa Maarit Haataja Jukka Jokela

Parasitized individuals are often expected to be poor competitors because they are weakened by infections. Many trematode species, however, although extensively exploiting their mollusc hosts, also induce gigantism (increased host size) by diverting host resources towards growth instead of reproduction. In such systems, alternatively to reduced competitive ability due to negative effects of par...

2016
Javier Gandasegui Pedro Fernández-Soto Juan Hernández-Goenaga Julio López-Abán Belén Vicente Antonio Muro

BACKGROUND Schistosomiasis remains one of the most common endemic parasitic diseases affecting over 230 million people worlwide. Schistosoma mansoni is the main species causing intestinal and hepatic schistosomiasis and the fresh water pulmonate snails of the genus Biomphalaria are best known for their role as intermediate hosts of the parasite. The development of new molecular monitoring assay...

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