WHOOPING COUGH

is an infectious disease usually | the pork tapo worm in its immaturo condition lives in the attacking childhood, and characterised by » distinctive | muscles of the pig, and only develops into the mature } 7 2) SAT ee | a a is consumed by a human being. Tho mature tape worm Thread-worm. | Round-worm. | Tape-worm. does not attack the muscles of its human host, but attaches | _— __ Ay ’ itself to the intestinal wall by means of four suckers with which its head is provided, and the worm then remains PRECAUTIONS. PRECAUTIONS, [s. 425]