The book Animal Parasites And Human Disease was written by author Asa Crawford Chandler Here you can read free online of Animal Parasites And Human Disease book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is Animal Parasites And Human Disease a good or bad book?
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It requires four moults to bring the larvae to sexual maturity. In most cases these parasites cause no incon- venience whatever and their presence is not even suspected. In Europe a large proportion of people are said to be infected, but in Amer- ica, according to Riley and Johannsen, there is reason for believing that the infection is far less common than is usually supposed. Since ^generation after generation may be produced on a single host the infection is potentially indefinite in its dura...tion. When the mites become numerous in the hair follicles sebaceous glands they sometimes cause " black- r heads " by causing a fatty accumulation to be produced, but they are not the only or even the usual cause of "black-heads. " The skin disease known as " acne " has also been attributed to these mites, but probably erroneously. Follicle mites have been suspected also of spreading leprosy. The method of transmission of the mites to another host is not definitely known but it is probable that the adults wander on the surface of the skin at times, and may then be transmitted by direct contact or by towels, as are itch mites.
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