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- W2088658575 abstract "Adult H. polygyrus are capable of surviving for many months after primary exposure of mice to infective larvae, raising the possibility that worms of this species have inherent resistance to intestinal immune responses. Accordingly experiments were carried out to determine whether H. polygyrus are resistant to the inflammatory changes elicited during the acute phase of the intestinal response to Trichinella spiralis. Adult worms were expelled from mice when their presence coincided with the most intense phase of inflammation elicited by T. spiralis. The effect was dose-dependent with more intense T. spiralis challenge resulting in a correspondingly greater loss of H. polygyrus. Even the less pathogenic species T. pseudospiralis elicited a response of sufficient intensity in NIH mice to cause the expulsion of H. polygyrus from concurrently infected animals. Tissue larval stages of H. polygyrus were protected from expulsion by their location deep in the intestinal walls and the maximum detrimental effect against H. polygyrus was observed during the adult phase or during the establishment of L3 larvae. Acceleration of the response to T. spiralis in immune challenged mice resulted in earlier loss of H. polygyrus. When the expulsion of T. spiralis was delayed (e.g. from slow responder C57BL/10 mice) the loss of H. polygyrus took place correspondingly later. These experiments demonstrate unequivocally that mouse strains which normally tolerate chronic infections with H. polygyrus have the capacity to mount intestinal inflammatory responses of sufficient vigour to remove the worms but that this potential is not normally realized. However, the observation that some H. polygyrus always survived even when the response induced by T. spiralis was of the rapid secondary type suggests that the parasites are resilient in the face of the inflammatory response capable of removing most of the worms. It is suggested that in addition to the immunomodulatory strategy employed by adult worms to prevent the intestinal response being elicited, the worms have a second line of defence which is reflected in their resilience to responses which they have been unable to prevent." @default.
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- W2088658575 date "1992-02-01" @default.
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- W2088658575 title "Susceptibility of adult Heligmosomoides polygyrus to intestinal inflammatory responses induced by heterologous infection" @default.
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- W2088658575 doi "https://doi.org/10.1016/0020-7519(92)90082-v" @default.
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