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Foram feitas duas séries de experiências para verificar a possibilidade da infecção de mosquitos com o P. juxtanucleare. Na primeira foram utilizados 158 exemplares de Aedes aegypti e 152 de Culex quinquefasciatus, com resultados negativos. Na segunda série foram usados 15 espécimes de Aedes lepidus, com resultado negativo, e 80 de C. quinquefasciatus. Dêstes últimos apenas 3 se infectaram, não tendo sido possível transmitir a infecção a pintos inoculados. Êste culicíneo não é considerado transmissor habitual do plasmódio em estudo em vista do baixo índice de infectividade observado nas experiências. São brevemente discutidos os resultados do presente trabalho, inclusive o insucesso das inoculações em pintos. In order to determine the possibility of infecting mosquitoes with P. juxtanucleare two series of experiments were made. In the first series 158 Aëdes aegypti and 152 Culex quinquefasciatus were examined with negative results. In the second experiments 15 Aëdes lepidus and 80 C. quinquefasciatus were used. All Aëdes lepidus were negative. Theree Culex were found to have become experimentally infected. However, no infection was produced in chickens which were inoculated with salivary glands or stomach removed form the three mosquitoes. C. quinquefasciatus is not considered to be the common vector of P. juxtanucleare because of the very low infection index presented. The results, including those of the unsuccessful chicken inoculations, are briefly discussed

Infecção experimental do Culex quinquefasciatus pelo Plasmodium juxtanucleare