Mosquitoes of all species obtainable have also been fed on human sub-Sects whose blood tests show a high faience of the innocuous Mitte rofilaria. "By later dissecting the mosquitoes it was possible to deter mine to what degree the parasites: develop in the mosquitoes, and thus which species are the most' dangerous carriers of Mlariasis, No doubt, many Shanghailanders have often' seen Chinese on the streets, more especially in rural districts, with enormously swollen legs. This "condition elephantiasis), for which no cure has yet been found, has for some time occupied the attention of Dr, Stephen Hu at the Lester Institute. Having found that. the disease, along with other deplorable maladies, is brought on by a parasite which only reaches the infestive stage within a mosquito, he has conducted experiments with' the object of determining the degree of danger from this source, The results of his experiments indicate that the common species of small brown night-biting mosquito is most susceptible to infection which in turn indicates that the most frequent night visitor may be a dangerous enemy. The question of which mosquitoes are capable of developing thie innocuous undeveloped form of the parasite which human beings often carry, was answered by allowing mosquitoes of various species to bite human subjects whose blood tests showed the prevalence of the undeveloped form. In many of the species of mosquitoes thus tested, the parasites died or reached various Stages of development, but it Is the [Culex pipiens (most common type of mosquito) in which full development to the dangerous infective stage Is reached most frequently,
Text read from the printed page and cleaned; old type leaves the occasional error.