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It is absolutely essential to maintain the highest standards of hygiene to prevent attack by insects. Bacteria and nematodes are other causes for worry. Bacteria occur when there is too much humidity and this shows in a wet rot or a brown blotch. To avoid this problem it is essential to constantly monitor the humidity level and maintain it as required.
To prevent the occurrence of nematodes, the substrata should be constantly changed-it should never be older than six months to one year. The straw must be carefully selected and should be disinfected thoroughly before use. 100 gms of potassium permanganate, or 20 ml of formalin should be sprayed on the bags if the disease should appear.
But to return to those preventive measures, and having done what we can with the air, we will turn our attention to the drinking water, for in addition to malarial microbes the drinking and washing water of West Africa is liable to contain dermazoic and entozoic organisms, and if you don't take care you will get from it into your anatomy Tinea versicolor, Tinea decalvans, Tinea circinata, Tinea sycosis, Tinea favosa, or some other member of that wretched family, let alone being nearly certain to import Trichocephalus dispar, Ascaris lumbricoides, Oxyuris vermicularis, and eight varieties of nematodes, each of them with an awful name of its own, and unpleasant consequences to you, and, lastly, a peculiar abomination, a Filaria.
Atkinson gave us an interesting little discourse on parasitology, with a brief account of the life history of some ecto- and some endo-parasites Nematodes, Trematodes. He pointed out how that in nearly every case there was a secondary host, how in some cases disease was caused, and in others the presence of the parasite was even helpful.
Several of these were brought off to the ship for Dr. Atkinson to play with, and he found nematodes in them, and parasites in the birds and fish. During the afternoon a swell began to roll in the bay and those on board the ship hoisted the warning signal and fired a sound rocket to recall the scattered parties.
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