caa a22 4500 386400083 CHVBK 20180307112155.0 cr unu---uuuuu 161130e198904 xx s 000 0 eng 10.1017/S0031182000062235 doi S0031182000062235 pii (NATIONALLICENCE)cambridge-10.1017/S0031182000062235 Immunosuppression by larvae of Moniliformis moniliformis (Acanthocephala) in their cockroach host (Periplaneta Americana) [Elektronische Daten] The results of 4 different assays for haemocytic immune responsiveness in the cockroach, Periplaneta americana, have shown that the presence of larvae of Moniliformis moniliformis within the haemocoele depresses the insect's immune reactivity. Thus, the proportion of haemocytes that phagocytose fluorescent latex beads in vivo, the proportion of haemocytes that can be stimulated in vitro by the β1,3-glucan, laminarin, to produce phenoloxidase, and the number of haemocytic aggregates produced in vivo in response to zymosan stimulation, are significantly depressed compared with control, unparasitized cockroaches. Also, when cockroaches are injected intra-haemocoelically with hatched oncospheres of the tapeworm, Hymenolepis diminuta, a higher prevalence and intensity of tapeworm larvae are found in insects already parasitized by M. moniliformis. All of these assays show that depression rather than total suppression of the immune response occurs; in the wild, this may be sufficient to ensure that the cockroach does not succumb to unrelated infections during the long developmental period of the parasite. Copyright © Cambridge University Press 1989 immunosuppression nationallicence haemocytic response nationallicence Periplaneta americana nationallicence Moniliformis moniliformis nationallicence Hymenolepis diminuta nationallicence Lackie Ann M. Department of Zoology, The University, Glasgow G12 8QQ, Scotland Holt Rohan Department of Zoology, The University, Glasgow G12 8QQ, Scotland Parasitology Cambridge University Press 98/2(1989-04), 307-314 0031-1820 98:2<307 1989 98 PAR https://doi.org/10.1017/S0031182000062235 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1017/S0031182000062235 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Lackie Ann M. Department of Zoology, The University, Glasgow G12 8QQ, Scotland NATIONALLICENCE 700 1- Holt Rohan Department of Zoology, The University, Glasgow G12 8QQ, Scotland NATIONALLICENCE 773 0- Parasitology Cambridge University Press 98/2(1989-04), 307-314 0031-1820 98:2<307 1989 98 PAR CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-cambridge