The detection of encapsulated and non-encapsulated species of Trichinella suggests the existence of two evolutive lines in the genus
In recent years, the discovery of many non-encapsulated isolates of Trichinella, designated Trichinella pseudospiralis and the identification of a new non-encapsulated species, Trichinella papuae, has revealed that the biomass of the genus Trichinella does not only include the well known encapsulate...
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2001-06-01
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Online Access: | http://dx.doi.org/10.1051/parasite/200108s2027 |
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doaj-20a5fb3a9d83407eaf30371a7b07c46e2021-02-02T04:08:17ZengEDP SciencesParasite1252-607X1776-10422001-06-018S27S2910.1051/parasite/200108s2027parasite200108s2p27The detection of encapsulated and non-encapsulated species of Trichinella suggests the existence of two evolutive lines in the genusPozio E.Zarlenga D.S.La Rosa G.In recent years, the discovery of many non-encapsulated isolates of Trichinella, designated Trichinella pseudospiralis and the identification of a new non-encapsulated species, Trichinella papuae, has revealed that the biomass of the genus Trichinella does not only include the well known encapsulated species (T. spiralis, T. nativa, T. britovi, T. murrelli, and T. nelsoni) but also includes geographically disseminated, non-encapsulated species that represent important biological entities in the genus. Larvae of the first stage (L1) of both non-encapsulated and encapsulated species are able to penetrate the muscle cell and induce a dedifferentiation of this cell. But following this point in the parenteral cycle, non-encapsulated and encapsulated species diverge with respect to their developmental strategies where L1 of encapsulated species are able to induce the nurse cell to synthesize collagen, unlike non-encapsulated larvae which do not induce collagen production. The presence or absence of a collagen capsule is of great importance in the natural cycle of these parasites in that it allows the encapsulated larva to survive to substantially longer periods of time and therefore remain infective even within putrefied muscle tissue.http://dx.doi.org/10.1051/parasite/200108s2027Trichinellaencapsulated larvaenon-encapsulated larvaeevolution |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Pozio E. Zarlenga D.S. La Rosa G. |
spellingShingle |
Pozio E. Zarlenga D.S. La Rosa G. The detection of encapsulated and non-encapsulated species of Trichinella suggests the existence of two evolutive lines in the genus Parasite Trichinella encapsulated larvae non-encapsulated larvae evolution |
author_facet |
Pozio E. Zarlenga D.S. La Rosa G. |
author_sort |
Pozio E. |
title |
The detection of encapsulated and non-encapsulated species of Trichinella suggests the existence of two evolutive lines in the genus |
title_short |
The detection of encapsulated and non-encapsulated species of Trichinella suggests the existence of two evolutive lines in the genus |
title_full |
The detection of encapsulated and non-encapsulated species of Trichinella suggests the existence of two evolutive lines in the genus |
title_fullStr |
The detection of encapsulated and non-encapsulated species of Trichinella suggests the existence of two evolutive lines in the genus |
title_full_unstemmed |
The detection of encapsulated and non-encapsulated species of Trichinella suggests the existence of two evolutive lines in the genus |
title_sort |
detection of encapsulated and non-encapsulated species of trichinella suggests the existence of two evolutive lines in the genus |
publisher |
EDP Sciences |
series |
Parasite |
issn |
1252-607X 1776-1042 |
publishDate |
2001-06-01 |
description |
In recent years, the discovery of many non-encapsulated isolates of Trichinella, designated Trichinella pseudospiralis and the identification of a new non-encapsulated species, Trichinella papuae, has revealed that the biomass of the genus Trichinella does not only include the well known encapsulated species (T. spiralis, T. nativa, T. britovi, T. murrelli, and T. nelsoni) but also includes geographically disseminated, non-encapsulated species that represent important biological entities in the genus. Larvae of the first stage (L1) of both non-encapsulated and encapsulated species are able to penetrate the muscle cell and induce a dedifferentiation of this cell. But following this point in the parenteral cycle, non-encapsulated and encapsulated species diverge with respect to their developmental strategies where L1 of encapsulated species are able to induce the nurse cell to synthesize collagen, unlike non-encapsulated larvae which do not induce collagen production. The presence or absence of a collagen capsule is of great importance in the natural cycle of these parasites in that it allows the encapsulated larva to survive to substantially longer periods of time and therefore remain infective even within putrefied muscle tissue. |
topic |
Trichinella encapsulated larvae non-encapsulated larvae evolution |
url |
http://dx.doi.org/10.1051/parasite/200108s2027 |
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