Show PEST SPREAD BY MOSQUITO Scientists Have Traced Cause of Disease Disease Disease Dis Dis- ease That Has Long Been Proy alent lent In the Tropics One of the time most peculiar of all diseases diseases dis dis- dis eases Is common in the trop trop- Ics es In the blood of ot persons sufferIng suffer suffer- Ing ng from It there are found toun Innumerable Innumerable able abl little worms that can tan be seen only by the aid of a microscope These are present only at night In the blood that Is circulating At about five o'clock In the afternoon they begin to appear In the blood having been hidden hidden hid hid- den awn away In time tile body until this time and find then the they remain In the circulation tion until about midnight when they begin to diminish By eight or nine o'clock In the morning they have ha all disappeared and a search of the blood under the microscope after this tails falls to o reveal any They are now collected In certain large blood vessels deep In Inthe Inthe inthe the body especially In the lungs where they remain hidden until they go out on their next nocturnal sion The parasite Is conveyed to human beings by the bite of at certain kinds of mosquitoes The mosquito bites and takes from a n man or from some animal animal ani ani- mal as the case may be blood which contains these small worms In the stomach of the mosquito the Intermediate intermediate intermediate diate host the parasite goes through certain definite changes or metamorphoses metamorphoses I which are Just as necessary to its ts complete life lite as are the different phases In the II lives yes of butterflies moths and a great man many Insects First It escapes from a skin or r shell In which It has existed Then It bores I Its way through the wall of ot the mosquito's mosquitos mos quito's stomach and travels forward through the body until It arrives es at atthe atthe the base of the bill or proboscis |