Effects of the mermithid nematode Mermis nigrescens ...
|Title||Effects of the mermithid nematode Mermis nigrescens on the levels of hemolymph and fecal uric acid in its host, the migratory locst Locusta migratoria|
|Author(s)||W. J. Condon, R. Gordon|
|Journal||Canadian Journal of Zoology|
|Abstract||In further investigations on the effects of parasitism by Mermis nigrescens on locusts [see RAE/A 61, 4050; 63, 1919], second- and third-instar nymphs of Locusta migratoria (L.) were infected with ova of the mermithid. After 24 days (when parasitic development had been completed), the haemolymph of parasitised locusts contained over 5 times the concentration of uric acid as that of unparasitised ones, while the concentration of faecal uric acid was reduced to one-quarter. These results are discussed in relation to the host-parasite relationship.ADDITIONAL ABSTRACT:The haemolymph of Locusta migratoria 24 days after infection with 80 Mermis nigrescens ova contained over 5 times the concentration of uric acid than that of uninfected controls. The concentration of faecal uric acid was reduced by infection to a quarter of that in controls. At the end of the experiment the locusts harboured an average of about 20 4th-stage larvae in their haemocoel..|
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