"This is a remarkable event that has occurred," said Theodore Andreadis, chief medical entomologist at the Connecticut Agricultural Experiment Station in New Haven.

Sir (Samuel) Rickard Christophers (27 November 1873 - 19 February 1978) was a British protozoologist and medical entomologist specialising in mosquitoes.

He worked on world Diptera, especially Nycteribiidae and was an eminent medical entomologist.

Theodore Andreadis, chief medical entomologist for the Connecticut Agricultural Experiment Station in New Haven, said the next couple of weeks are going to be critical.

Theodore G. Andreadis, the chief medical entomologist, said the conclusion was reached after DNA testing was done on blood found in three species of mosquitoes.

Gwadz, a medical entomologist, now helps to run the malaria research program out of his subterranean office at the National Institutes of Health in Bethesda, Md.

"This year is wet," said Wayne Kramer, medical entomologist with Nebraska's Department of Health and Human Services, so the problem could be worse.

His successor, Pierre Guillet, a medical entomologist, said Dr. Schapira quit because he was uncomfortable with the new approach on insecticide spraying.

When West Nile encephalitis broke out in New York, Dr. Gubler said, the city had trouble finding a medical entomologist.

There are many species of mosquitoes, and they all hibernate, or, more properly, overwinter, said Durland Fish, a medical entomologist with the New York Medical College.