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The Parallel Incidence of Filaria Bancrofti and the ß-Haemolytic Streptococcus in Certain Tropical Countries

1. A cultural examination of one hundred consecutive abscesses in Jamaica shows that only 6 per cent contain the ß-haemolytic streptococcus, the remainder containing the staphylococcus.

2. A filarial census of 250 unselected persons together with routine laboratory observations over many years reveals that while Filaria bancrofti is occasionally introduced it does not spread in Jamaica although the requisite mosquito vector abounds in the island.

3. There is, thus, in Jamaica a parallel low incidence of the ß-haemolytic streptococcus and of Filaria bancrofti comparable to the parallel high incidence of these agents in British Guiana and in st. Kitts.

4. Lymphangitis and elephantiasis are both very rare in Jamaica.

5. Histological, clinical and bacteriological evidence from a case of elephantiasis in Jamaica appearsto support the hypothesis that elephantiasis in the Caribbean tropics is associated with the presence of many minute foci of the ß-haemolytic streptococcus in the corium of the affected part.

6. Intramuscular abscesses, whose relation to Filaria bancrofti is still in dispute, are practically unknown in Jamaica.