Seroepidemiological study of herpes viruses in Nepal
Kubo, T.; Rai, S.K.; Nakanishi, M.; Yamano, T.
Southeast Asian Journal of Tropical Medicine and Public Health 22(3): 323-325
1991
ISSN/ISBN: 0125-1562 PMID: 1667956 Document Number: 743
Data are presented on the pH values obtained in the various regions of the digestive tract of twenty insect species representing three orders of insects. All measurements of pH were made electrometrically by means of a one-drop glass electrode, with appropriate accessory attachments, in combination with a Model G Beckman pH meter. Insect specimens with considerable 'food in the digestive tract were selected for study, and the samples consisted of whole gut contents. The techniques employed in obtaining the insect specimens, preparing them for withdrawal of samples, and removing the samples are described. The average pH values obtained for ten species of adult grasshopers (Orthoptera) were: fluid emitted from the mouth, 5.5; crop, 5.6; fore-stomach, 6.4; hind-stomach, 6.7; intestine, 6.7; and rectum, 6.2. Similar values for the adults of the American cockroach (Orthoptera) were: crop, 5.2; fore-stomach, 6.0; hind-stomach, 6.2; intestine, 6.9; and freshly voided faeces, 7.5. The average pH values obtained for eight species of caterpillars (Lepidoptera) were: fore-stomach, 8.4; mid-stomach, 8.5; hind-stomach, 7.7; and rectum, 6.3 The pH values obtained on a single species of sawfly larva (Hymenoptera) were: crop, 5.5; fore-stomach, 6.6; hind-stomach, 7.1; and rectum, 6.1. These data are critically compared with pertinent existing information on insect alimentary canal pH; and the possible relationships in digestive tract reaction between different insect species are discussed.
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