. Animal parasites and parasitic diseases. Horses; Domestic animals -- Parasites; Veterinary medicine. 158 PARASITOLOGY. arranged, point backwards. The booklets are very small and resemble, in shape, those of a cat's claw. The posterior half of the female is attenuated until it is no larger than a knitting needle; the female is eight to twelve inches long, the male three to four inches. Life Cycle.—The fe- male is oviparous; the eggs are oblong and contain fully developed embryos, in a few days after they have passed to the ground with the feces; if they are in- gested by the intermed- iate ho
. Animal parasites and parasitic diseases. Horses; Domestic animals -- Parasites; Veterinary medicine. 158 PARASITOLOGY. arranged, point backwards. The booklets are very small and resemble, in shape, those of a cat's claw. The posterior half of the female is attenuated until it is no larger than a knitting needle; the female is eight to twelve inches long, the male three to four inches. Life Cycle.—The fe- male is oviparous; the eggs are oblong and contain fully developed embryos, in a few days after they have passed to the ground with the feces; if they are in- gested by the intermed- iate host, which is the larva of the May bug (white worm or grub worms) they soon hatch in its digestive tract; this embryo is very small and provided with four small hook-. Fig. 62 —ECHINORHYNCHUS GiGAS. Cephalic extremity showing globe- shaped proboscis and six rows of booklets. Photomicrograph, 1\% lets with which it burrows through the intestinal wall and becomes encysted in the abdominal cavity ; when this cyst matures it contains the fully developed larva, which retains its vitality during the existence of the larval worm and has been noted still alive after metamorphosis into the perfect insect; it is possible that other invertebrates may act as an intermediate host; if the pig eats these white worms or May beetles containing the encysted larva, the young echi- norhynchus is set free by the process of digestion. 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 Kaupp, B. F. (Benjamin Franklyn), 1874-. Chicago : A. Eger
Size: 1491px × 1677px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, booksubjecthorses, bookyear1917
