. The dog as a carrier of parasites and diseases. Dogs as carriers of disease; Dogs. 16 CIRCULAR 338, TJ. S. DEPT. OP AGRlCtTLTtlRE The human flea (fig. 13) appears to be the most common flea attacking dogs and persons along the western coast of the United States and in parts of the South. It has substantially the same habits as have the dog and cat fleas, but spends more time off its host ani- mal than do these The sticktight flea (fig. 14) is most common in the Southern and Southwest- ern States, but may occur as far north as Kansas. It is normally a parasite of poul- try andmay occur on bir
. The dog as a carrier of parasites and diseases. Dogs as carriers of disease; Dogs. 16 CIRCULAR 338, TJ. S. DEPT. OP AGRlCtTLTtlRE The human flea (fig. 13) appears to be the most common flea attacking dogs and persons along the western coast of the United States and in parts of the South. It has substantially the same habits as have the dog and cat fleas, but spends more time off its host ani- mal than do these The sticktight flea (fig. 14) is most common in the Southern and Southwest- ern States, but may occur as far north as Kansas. It is normally a parasite of poul- try andmay occur on birds in suffi- cient numbers to cause death. It has little disposi- tion to move about on its host, but remains firmly attached to the skin most of the time. Dogs usually become infested with this flea by contact with infested fowls and premises. Symptoms.—A number of spe- cies of fleas, iacluding the dog fleas, are known to carry the or- ganism of bubonic plague, a very serious disease which man shares with such rodents as rats. This plague occasionally occurs in the United States. The human flea is thought to convey infantile kala-azar at times. The dog flea, cat flea, and human flea act as intermediate hosts of the double- pored tapeworm, just as the bit- ing louse has already been shown to act. In the case of fleas the larval fleas become infested with the larval tapeworms by eating tapeworm eggs present in con- taminated trash, in bedding, and elsewhere. Fleas are, therefore, dangerous as carriers of disease and Figure 13.—The human flea, Pulex irritans. Male. Enlarged. From Bishopp, 1921. Lateral 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 Hall, Maurice C. (Maurice Crowther), 1881-1938. Washington [Govt. Print. Off. ]
Size: 1539px × 1623px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, bookpublisherwashingtongovtprin
