PMID: 2112578May 1, 1990Paper

Studies on the cellular defense reactions of the madeira cockroach, Leucophaea maderae: in vitro phagocytosis of different strains of Bacillus cereus and their effect on hemocyte viability

Journal of Invertebrate Pathology
M Rahmet-Alla, A F Rowley

Abstract

Monolayers of Leucophaea maderae hemocytes, consisting of mainly plasmatocytes and coagulocytes, were incubated with three strains of Bacillus cereus of differing pathogenicities, and the levels of phagocytosis and hemocyte viability were determined. Incubation with viable B. cereus strains NCTC 2599, NCIB 3329, and B1 resulted in a significant drop in hemocyte viability after 60 min of incubation compared with the saline-only controls. The greatest effect, however, resulted from incubation with B. cereus B1 which is the most pathogenic of the three strains studied. The killing effect of the three B. cereus strains was abolished following their UV irradiation. Incubation of monolayers with viable B. cereus B1 resulted in a level of phagocytic activity at all time periods lower than that with the other two strains. The highest levels of phagocytosis were achieved with UV-killed B. cereus, although no significant differences were found in these values between the three strains at any of the incubation times. Phospholipase C, a lytic enzyme shown to be released by all three strains of B. cereus, although in varying amounts, also caused hemocyte death following its incubation with the monolayers. These data suggest that the hemocyt...Continue Reading

References

Sep 1, 1975·Journal of Invertebrate Pathology·N A Ratcliffe, A F Rowley
Jan 1, 1981·Pharmacology & Therapeutics·P C Turnbull

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Citations

Apr 1, 2000·Microbes and Infection·A KotirantaM Haapasalo
Jan 11, 2000·Clinical Microbiology Reviews·M A Ghannoum
Oct 24, 2012·Progress in Lipid Research·Igor PokotyloJan Martinec
Nov 1, 2020·Applied Microbiology and Biotechnology·Juan Guzman, Andreas Vilcinskas
Oct 1, 1993·Clinical Microbiology Reviews·F A Drobniewski

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