Malaria According to the New Researches

Purchase of this book includes free trial access to www.million-books.com where you can read more than a million books for free. This is an OCR edition with typos. Excerpt from book: less heaped, and dispersed more regularly in rays, and by the residua of segmentation being more numerous. So that this fact which is observed in the intestine of the mosquito is also in favour of the plurality of the species of haemosporidia of human malaria. In the quartan also, according to these...
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Purchase of this book includes free trial access to www.million-books.com where you can read more than a million books for free. This is an OCR edition with typos. Excerpt from book: less heaped, and dispersed more regularly in rays, and by the residua of segmentation being more numerous. So that this fact which is observed in the intestine of the mosquito is also in favour of the plurality of the species of haemosporidia of human malaria. In the quartan also, according to these authors, things are very similar to those of the mild tertian. The temperature at which the haemosporidia develop in the mosquito's body must be above 16 0.; however, the maximum temperature is about 30 C. It is probable that those of the quartan develop at a lower temperature, but this requires further proof. Be this as it may, it is now proved beyond doubt that the cycle of perfect life, that by which the species external to man is assured, is completed by the hcemo- sporidia of human malaria in the intestine of the mosquito. SOUBCES OF MALAEIAL INFECTION Man is an undeniable source of infection, both experimental and natural. It is known that when a healthy man is inoculated even with a very minute quantity of malarial blood, it reproduces not only this infection, but also the type of the fever with the relative haemosporidia. But from the point of view of the mode of natural infection, it is known that a malarial person can mix freely with other patients or with healthy individuals without conveying to them the disease; today, however, we must add: provided there are nomosquitoes present capable of biting him and healthy individuals. The mosquito, the definitive host of the malarial parasite, is the second source of infection. That the mosquito was connected in some way with malarial infection has been imagined, as we shah1 see, by many, but that it was the true source of infection has been for the first time supposed by analogy with filariasis. It is known tha...