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Induction of lymphatic lesions by Brugia pahangi in jirds with large and small preexisting homologous intraperitoneal infections.

Identifieur interne : 005B33 ( PubMed/Checkpoint ); précédent : 005B32; suivant : 005B34

Induction of lymphatic lesions by Brugia pahangi in jirds with large and small preexisting homologous intraperitoneal infections.

Auteurs : T R Klei ; K C Mcdonough ; S U Coleman ; F M Enright

Source :

RBID : pubmed:3585623

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English descriptors

Abstract

The effect of intraperitoneal (i.p.) infections induced by inoculations of 30 or 150 Brugia pahangi third-stage larvae (L3) on the development of infections and lymphatic lesions induced by subsequent homologous subcutaneous (s.c.) inoculations were compared in the present study. Lymphatic lesion severity, as judged by the numbers of lymph thrombi present, and lymphatic lesion scores were significantly reduced in both groups of jirds with existing i.p. infections. The numbers of adult worms that developed, locations of these worms, and the subsequent microfilaremias did not differ significantly between groups. All jirds with i.p. infections developed similar antibody titers to crude somatic adult antigen as measured by ELISA. These levels did not change following s.c. infections. Immediate and delayed footpad swelling responses were also similar in all groups. Results of these experiments support and extend previous studies indicating that i.p. infections of B. pahangi induce a hyporesponsive state in jirds to subsequent s.c. infections without significantly affecting the subsequent parasite burden. This effect appears to be independent of the numbers of L3 inoculated i.p. prior to lymphatic-induced infection. Circulating antibody titers and footpad swelling responses to B. pahangi antigen were not reduced in jirds with the hyporesponsive lymphatic inflammatory response and do not correlate with this condition.

PubMed: 3585623


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pubmed:3585623

Le document en format XML

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<div type="abstract" xml:lang="en">The effect of intraperitoneal (i.p.) infections induced by inoculations of 30 or 150 Brugia pahangi third-stage larvae (L3) on the development of infections and lymphatic lesions induced by subsequent homologous subcutaneous (s.c.) inoculations were compared in the present study. Lymphatic lesion severity, as judged by the numbers of lymph thrombi present, and lymphatic lesion scores were significantly reduced in both groups of jirds with existing i.p. infections. The numbers of adult worms that developed, locations of these worms, and the subsequent microfilaremias did not differ significantly between groups. All jirds with i.p. infections developed similar antibody titers to crude somatic adult antigen as measured by ELISA. These levels did not change following s.c. infections. Immediate and delayed footpad swelling responses were also similar in all groups. Results of these experiments support and extend previous studies indicating that i.p. infections of B. pahangi induce a hyporesponsive state in jirds to subsequent s.c. infections without significantly affecting the subsequent parasite burden. This effect appears to be independent of the numbers of L3 inoculated i.p. prior to lymphatic-induced infection. Circulating antibody titers and footpad swelling responses to B. pahangi antigen were not reduced in jirds with the hyporesponsive lymphatic inflammatory response and do not correlate with this condition.</div>
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