Susceptibilidad de las larvas de Anopheles pseudopunctipennis al parasitismo del nematodo Romanomermis iyengari (Nematoda: Mermithidae), Estado de Oaxaca, México.

Mosquito larvae of the species Anopheles pseudopunctipennis Theobald 1901 were studied under laboratory and field conditions to evaluate the level of susceptibility to the parasitism of nematode Romanomermis iyengari Welch 1964. Doses of 5:1 and 10:1 and development stage II larvae collected in natural reservoirs were used for the laboratory assays. A dose of 1,000 preparasitic agents/m2 was applied to field trials. The results of the lab and field tests yielded high levels of infestation in larvae with values ranging from 90 to 100% and from 85 to 95%, respectively. A marked reduction of the larval densities was observed in the 5 treated reservoirs seven days later, which showed an elevated susceptibility of the anopheline species to mermithid parasitism.