A study of human cases of dermal leishmaniasis shows that the infection is not confined to “high bush” but may be present in bush of any type. The advisability of employing prophylactic vaccination under certain conditions is worth considering. A rat was found to be infected with Leishmania mexicana, but there was no Leishmania among parasites obtained from lizards. 14 species of Phlebotomus were found, and preliminary observations were made on age changes and other features. Attempts to ascertain the natural infection rate, by inspection and by injection into hamsters, gave negative results, and possible reasons for this are discussed.
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Williams et al. (1965) studied this question.
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