PMID: 11931039Apr 5, 2002Paper

Resistance of the tick dermacentor variabilis (Acari: Ixodidae) following challenge with the bacterium Escherichia coli (Enterobacteriales: Enterobacteriaceae)

Journal of Medical Entomology
Shane CeraulWayne L Hynes

Abstract

In addition to a soluble response, many invertebrates control bacterial infections by means of phagocytosis or melanotic encapsulation. In some insects, Escherichia coli growth is reported to be inhibited by aggregation/encapsulation. Soluble and phagocytic responses to bacterial challenge have been reported in ticks, but evidence of an aggregation / encapsulation response was reported only for inanimate (araldite) implants. Ticks were challenged by direct inoculation of bacteria into the hemocoel cavity. By plating, no viable E. coli were detected 6 h postinoculation. A direct fluorescence assay (DFA) revealed aggregated bacteria 1 h postinoculation. Furthermore, DFA showed aggregated bacteria at 6,24, and 48 h postinoculation associated with masses of tissue, presumably of cellular origin, suggesting events similar to those described as nodulation. These findings suggest that encapsulation/ nodulation may be an important component of the immune response in ticks.

References

Oct 1, 1990·Experimental & Applied Acarology·L R EggenbergerL B Coons
Jan 1, 1997·Annual Review of Entomology·J P GillespieT Trenczek
Nov 24, 1999·Insect Biochemistry and Molecular Biology·P KopácekI Safarík
Mar 25, 2000·Insect Biochemistry and Molecular Biology·V KovárL Grubhoffer
Jul 6, 2001·Insect Biochemistry and Molecular Biology·R JohnsW L Hynes

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Citations

Sep 1, 2005·Experimental & Applied Acarology·Daniel E SonenshineTiffany Benzine
Nov 28, 2006·Journal of Invertebrate Pathology·Gerald D BaldridgeUlrike G Munderloh
Jun 9, 2005·Parasitology·M SamishI Glazer
Jun 14, 2019·Frontiers in Physiology·Jéssica FiorottiVânia Rita Elias Pinheiro Bittencourt
Jan 24, 2021·Developmental and Comparative Immunology·Melbourne Rio TalactacTetsuya Tanaka
Mar 20, 2021·Frontiers in Immunology·Andréa C FogaçaSirlei Daffre

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