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    Cellular And Humoral Defenses Of Glossina (diptera: Glossinidae): Reactions Against Bacteria, Trypanosomes, And Experimental Implants

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    Date
    1986-01
    Author
    Kaaya, GP
    Ratcliffe, NA
    Alemu, P
    Type
    Article
    Language
    en
    Metadata
    Show full item record

    Abstract
    Bacillus cereus was more pathogenic than Escherichia coli to Glossina morsitans morsitans (Diptera: Glossinidae) when injected into the hemocoel. Bacteria were phagocytosed by individual hemocytes, and small hemocyte clumps entrapping several bacteria were formed, but typical nodules were not observed. Injection of live E. coli caused no decrease in total hemocyte counts (THCs), while live B. cereus and E. coli endotoxin caused significant drops in THCs resulting from marked hemocyte clumping and lysis. Foreign tissues implanted into GLOSSINA became intensely melanized, but no cellular encapsulation was ever observed. Vaccination of G. m. morsitans with small doses of live E. coli conferred some protective immunity to challenge with subsequent higher doses of the same organism. Hemolymph collected from G. m. morsitans 48 h after injection with live E. coli showed an increase in 2 preexisting proteins with molecular weights of ca. 70,000 and 17,000 daltons. This increase was not observed in the hemolymph of flies inoculated with heat-killed E. coli or B. cereus, or with E. coli endotoxin, live T. b. brucei, or saline.
    URI
    http://www.ingentaconnect.com/content/esa/jme/1986/00000023/00000001/art00005
    http://erepository.uonbi.ac.ke:8080/xmlui/handle/123456789/35108
    Citation
    Journal of Medical Entomology, Volume 23, Number 1, 24 January 1986 , pp. 30-43(14)
    Publisher
    Uniiversity of Nairobi.
     
    School of Biological Sciences
     
    Collections
    • Faculty of Science & Technology (FST) [4284]

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