Development of Schistosoma mansoni in Biomphalaria tenagophila, Biomphalaria straminea and Biomphalaria glabrata Desenvolvimento do Schistosoma mansoni em Biomphalaria tenagophila, Biomphalaria straminea e Biomphalaria glabrata
A comparative study of the development of Schistosoma mansoni during the intra-molluscan phase was made by means of histological sections of Biomphalaria tenagophila, B. straminea and B. glabrata from Brazil. Two hundred snails of each species were individually exposed to 50 miracidia of the S. mans...
Published in: | Revista do Instituto de Medicina Tropical de São Paulo |
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Language: | English |
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Universidade de São Paulo (USP)
1995
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ftdoajarticles:oai:doaj.org/article:065a915963fe4317932515c726491f25 2024-09-09T19:28:25+00:00 Development of Schistosoma mansoni in Biomphalaria tenagophila, Biomphalaria straminea and Biomphalaria glabrata Desenvolvimento do Schistosoma mansoni em Biomphalaria tenagophila, Biomphalaria straminea e Biomphalaria glabrata Cecilia Pereira de Souza Rita de Cássia Palma Cunha Zilton A. Andrade 1995-06-01T00:00:00Z https://doi.org/10.1590/S0036-46651995000300004 https://doaj.org/article/065a915963fe4317932515c726491f25 EN eng Universidade de São Paulo (USP) http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0036-46651995000300004 https://doaj.org/toc/0036-4665 https://doaj.org/toc/1678-9946 doi:10.1590/S0036-46651995000300004 0036-4665 1678-9946 https://doaj.org/article/065a915963fe4317932515c726491f25 Revista do Instituto de Medicina Tropical de São Paulo, Vol 37, Iss 3, Pp 201-206 (1995) Schistosoma mansoni Biomphalaria tenagophila Biomphalaria straminea Biomphalaria glabrata Arctic medicine. Tropical medicine RC955-962 Infectious and parasitic diseases RC109-216 article 1995 ftdoajarticles https://doi.org/10.1590/S0036-46651995000300004 2024-08-05T17:49:31Z A comparative study of the development of Schistosoma mansoni during the intra-molluscan phase was made by means of histological sections of Biomphalaria tenagophila, B. straminea and B. glabrata from Brazil. Two hundred snails of each species were individually exposed to 50 miracidia of the S. mansoni, AL line. No larvae were observed in the snails fixed 72 h after exposure. In specimens shedding cercariae, 31 days after exposure tissue reactions encapsulating the larvae were seen in B. tenagophila and B. straminea, in the head-foot, mantle collar and renal ducts. No tissue reactions occurred in the digestive glands of these two species. In B. glabrata the presence of numerous sporocysts and cercariae without tissue reactions was observed in the digestive gland, and other organs. The levels of infection of the snails and the average numbers of cercariae shed per day were 32.6% and 79±90 respectively for B. tenagophila, 11.3% and 112±100 for B. straminea and 75.3% and 432±436 for B. glabrata. The lower levels of infection and average numbers of cercariae shed by B. tenagophila and B. straminea are thus related to their more potent internal defense systems. Foi feito estudo comparativo do desenvolvimento do Schistosoma mansoni na fase intra-molusco, através de cortes histológicos, em Biomphalaria tenagophila, B. straminea e B. glabrata. Duzentos moluscos de cada espécie foram expostos individualmente a 50 miracídios de S. mansoni da linhagem AL. Nenhuma larva foi observada nos exemplares fixados 72 horas após a exposição. Nos exemplares eliminando cercárías, 31 dias após a exposição, foram observadas reações teciduais de encapsulamento de larvas em B. tenagophila e B. straminea, na região cefalopodal, colar do manto e dutos renais. Nas glândulas digestivas das duas espécies não foram observadas reações. Em B. glabrata foi registrada a presença de numerosos esporocistos e cercárias sem reação tecidual na glândula digestiva e outros órgãos. As taxas de infecção desses moluscos com AL e as médias de cercárias ... Article in Journal/Newspaper Arctic Directory of Open Access Journals: DOAJ Articles Arctic Revista do Instituto de Medicina Tropical de São Paulo 37 3 201 206 |
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Open Polar |
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Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Schistosoma mansoni Biomphalaria tenagophila Biomphalaria straminea Biomphalaria glabrata Arctic medicine. Tropical medicine RC955-962 Infectious and parasitic diseases RC109-216 |
spellingShingle |
Schistosoma mansoni Biomphalaria tenagophila Biomphalaria straminea Biomphalaria glabrata Arctic medicine. Tropical medicine RC955-962 Infectious and parasitic diseases RC109-216 Cecilia Pereira de Souza Rita de Cássia Palma Cunha Zilton A. Andrade Development of Schistosoma mansoni in Biomphalaria tenagophila, Biomphalaria straminea and Biomphalaria glabrata Desenvolvimento do Schistosoma mansoni em Biomphalaria tenagophila, Biomphalaria straminea e Biomphalaria glabrata |
topic_facet |
Schistosoma mansoni Biomphalaria tenagophila Biomphalaria straminea Biomphalaria glabrata Arctic medicine. Tropical medicine RC955-962 Infectious and parasitic diseases RC109-216 |
description |
A comparative study of the development of Schistosoma mansoni during the intra-molluscan phase was made by means of histological sections of Biomphalaria tenagophila, B. straminea and B. glabrata from Brazil. Two hundred snails of each species were individually exposed to 50 miracidia of the S. mansoni, AL line. No larvae were observed in the snails fixed 72 h after exposure. In specimens shedding cercariae, 31 days after exposure tissue reactions encapsulating the larvae were seen in B. tenagophila and B. straminea, in the head-foot, mantle collar and renal ducts. No tissue reactions occurred in the digestive glands of these two species. In B. glabrata the presence of numerous sporocysts and cercariae without tissue reactions was observed in the digestive gland, and other organs. The levels of infection of the snails and the average numbers of cercariae shed per day were 32.6% and 79±90 respectively for B. tenagophila, 11.3% and 112±100 for B. straminea and 75.3% and 432±436 for B. glabrata. The lower levels of infection and average numbers of cercariae shed by B. tenagophila and B. straminea are thus related to their more potent internal defense systems. Foi feito estudo comparativo do desenvolvimento do Schistosoma mansoni na fase intra-molusco, através de cortes histológicos, em Biomphalaria tenagophila, B. straminea e B. glabrata. Duzentos moluscos de cada espécie foram expostos individualmente a 50 miracídios de S. mansoni da linhagem AL. Nenhuma larva foi observada nos exemplares fixados 72 horas após a exposição. Nos exemplares eliminando cercárías, 31 dias após a exposição, foram observadas reações teciduais de encapsulamento de larvas em B. tenagophila e B. straminea, na região cefalopodal, colar do manto e dutos renais. Nas glândulas digestivas das duas espécies não foram observadas reações. Em B. glabrata foi registrada a presença de numerosos esporocistos e cercárias sem reação tecidual na glândula digestiva e outros órgãos. As taxas de infecção desses moluscos com AL e as médias de cercárias ... |
format |
Article in Journal/Newspaper |
author |
Cecilia Pereira de Souza Rita de Cássia Palma Cunha Zilton A. Andrade |
author_facet |
Cecilia Pereira de Souza Rita de Cássia Palma Cunha Zilton A. Andrade |
author_sort |
Cecilia Pereira de Souza |
title |
Development of Schistosoma mansoni in Biomphalaria tenagophila, Biomphalaria straminea and Biomphalaria glabrata Desenvolvimento do Schistosoma mansoni em Biomphalaria tenagophila, Biomphalaria straminea e Biomphalaria glabrata |
title_short |
Development of Schistosoma mansoni in Biomphalaria tenagophila, Biomphalaria straminea and Biomphalaria glabrata Desenvolvimento do Schistosoma mansoni em Biomphalaria tenagophila, Biomphalaria straminea e Biomphalaria glabrata |
title_full |
Development of Schistosoma mansoni in Biomphalaria tenagophila, Biomphalaria straminea and Biomphalaria glabrata Desenvolvimento do Schistosoma mansoni em Biomphalaria tenagophila, Biomphalaria straminea e Biomphalaria glabrata |
title_fullStr |
Development of Schistosoma mansoni in Biomphalaria tenagophila, Biomphalaria straminea and Biomphalaria glabrata Desenvolvimento do Schistosoma mansoni em Biomphalaria tenagophila, Biomphalaria straminea e Biomphalaria glabrata |
title_full_unstemmed |
Development of Schistosoma mansoni in Biomphalaria tenagophila, Biomphalaria straminea and Biomphalaria glabrata Desenvolvimento do Schistosoma mansoni em Biomphalaria tenagophila, Biomphalaria straminea e Biomphalaria glabrata |
title_sort |
development of schistosoma mansoni in biomphalaria tenagophila, biomphalaria straminea and biomphalaria glabrata desenvolvimento do schistosoma mansoni em biomphalaria tenagophila, biomphalaria straminea e biomphalaria glabrata |
publisher |
Universidade de São Paulo (USP) |
publishDate |
1995 |
url |
https://doi.org/10.1590/S0036-46651995000300004 https://doaj.org/article/065a915963fe4317932515c726491f25 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
Revista do Instituto de Medicina Tropical de São Paulo, Vol 37, Iss 3, Pp 201-206 (1995) |
op_relation |
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0036-46651995000300004 https://doaj.org/toc/0036-4665 https://doaj.org/toc/1678-9946 doi:10.1590/S0036-46651995000300004 0036-4665 1678-9946 https://doaj.org/article/065a915963fe4317932515c726491f25 |
op_doi |
https://doi.org/10.1590/S0036-46651995000300004 |
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Revista do Instituto de Medicina Tropical de São Paulo |
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37 |
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