caa a22 4500 386399360 CHVBK 20180307112152.0 cr unu---uuuuu 161130e198902 xx s 000 0 eng 10.1017/S0031182000059667 doi S0031182000059667 pii (NATIONALLICENCE)cambridge-10.1017/S0031182000059667 Effects of infection with Echinostoma paraensei on the circulating haemocyte population of the host snail Biomphalaria glabrata [Elektronische Daten] Circulating haemocytes from Echinostoma paraensei-infected M line Biomphalaria glabrata snails, or from age- and sizematched control snails, were studied on plastic slides with phase-contrast optics. Granulocytes, hyalinocytes, and round cells were consistently present; granulocytes were further categorized as ‘fully spread' (FS) or ‘partially spread' (PS). Among control snails, the relative percentage and estimated number/mm3 of round cells declined significantly with increased snail size, and the corresponding values for both categories of granulocytes increased. At 1 day post-infection (p.i.) with E. paraensei, overall composition of the haemocyte population was relatively unaffected, but by 8 days p.i. infected snails had significantly higher relative percentages of round cells and PS granulocytes than controls. Because a marked increase in the number of circulating haemocytes is also evident by 8 days p.i., infected snails had approximately 12 times more round cells and PS granulocytes/mm3 of haemolymph than did controls. At 30 days p.i. the relative and absolute abundance of PS granulocytes was still significantly elevated, but otherwise haemocyte populations did not differ from control snails. Alterations in granulocyte size in infected snails were also noted. Infection with E. paraensei has a striking impact of circulating haemocyte populations and also increases the relative concentration of haemocytes with less ability to adhere to a foreign surface. Copyright © Cambridge University Press 1989 Noda S. Department of Biology, The University of New Mexico, Albuquerque, New Mexico 87131, USA Loker E. S. Department of Biology, The University of New Mexico, Albuquerque, New Mexico 87131, USA Parasitology Cambridge University Press 98/1(1989-02), 35-41 0031-1820 98:1<35 1989 98 PAR https://doi.org/10.1017/S0031182000059667 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1017/S0031182000059667 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Noda S. Department of Biology, The University of New Mexico, Albuquerque, New Mexico 87131, USA NATIONALLICENCE 700 1- Loker E. S. Department of Biology, The University of New Mexico, Albuquerque, New Mexico 87131, USA NATIONALLICENCE 773 0- Parasitology Cambridge University Press 98/1(1989-02), 35-41 0031-1820 98:1<35 1989 98 PAR CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-cambridge