Journal
JOURNAL OF INVERTEBRATE PATHOLOGY
Volume 101, Issue 3, Pages 234-241Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jip.2009.05.008
Keywords
Termite; Metarhizium; Disease resistance; Cellular encapsulation; Hemocytes
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Reticulitermes flavipes workers were topically inoculated with approximate to 10,000 conidia of the entomopathogenic fungus Metarhizium anisopliae. After being kept in groups of 20 individuals for 1-9 d, histopathological examination showed that termites had an individual immune reaction. The nodule formation at the point of entrance of the fungal hyphae was identified as a cellular encapsulation and the different steps in the nodule formation are described. The relative number of hemocytes per termite increased 24 h after fungal exposure and remained high in the hemolymph for at least 3 d before decreasing back to pre-exposure levels. The role of an individual immune cellular reaction in social insects is discussed. (C) 2009 Elsevier Inc. All rights reserved.
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