[House effect and family contamination in XXXX : interpretative trial of the phenomenon. Study of 3 Congolese foci].

@entity7246 @entity1 @entity25 @entity281 @entity238
A review is given of the different hypotheses concerning the concentration of @entity7246 cases at the house or family level: 1. Mechanical transmission by haematophagous insects. 2. Interrupted feeding of a tsetse @entity238 with @entity281 on different @entity1 . 3. Family biological factor. These hypotheses are used as a introduction to an epidemiological field study in three congolese foci. Whereas their distribution among village districts is random, @entity1 are significantly aggregated at the house and/or family level. This distribution may be partly explained by the behaviour of members of the family and community cells, associated with amplifying factors, the most probable being interrupted feeding of a tsetse @entity238 with @entity281 . In some foci other possibilities can be considered, such as mechanical transmission by Aedes or hereditary population factors. This spatial and/or familial concentration of cases is an important epidemiological property of @entity25 , the practical implication of which is the exhaustive survey of the @entity1 environment of cases.
