. Animal parasites and messmates. Parasites. TRANSMIGRATIONS AND METAMORPHOSES. 241 The Ascarls acus of the pike lives at first in a common white fish, the Leuciscus alburniis, and passes with this fish, which serves it as a vehicle, into its final host. Another common nematode, the Oxyurus vermicularis (Fig. 69), a parasite of man, is a small worm of the size of a fine pin, which often multiplies in the rectum of children, causing intolerable itching. It is by means of their microscopic eggs that they penetrate into the system; these are hatched in the stomach, and are com- pletely developed
. Animal parasites and messmates. Parasites. TRANSMIGRATIONS AND METAMORPHOSES. 241 The Ascarls acus of the pike lives at first in a common white fish, the Leuciscus alburniis, and passes with this fish, which serves it as a vehicle, into its final host. Another common nematode, the Oxyurus vermicularis (Fig. 69), a parasite of man, is a small worm of the size of a fine pin, which often multiplies in the rectum of children, causing intolerable itching. It is by means of their microscopic eggs that they penetrate into the system; these are hatched in the stomach, and are com- pletely developed at the end of eight or ten days. They pass from the anus in great Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Beneden, M. van (Pierre Joseph), 1809-1894. New York, D. Appleton and Company
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectparasit, bookyear1876
