Effects of the mermithid nematode Mermis nigrescens ...
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| 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. Condon, R. Gordon |
| Journal | Canadian Journal of Zoology |
| Date | 1977 |
| Volume | 55 |
| Issue | 4 |
| Start page | 690 |
| End page | 692 |
| 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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