. Preventive medicine and hygiene. cerned, but as the thoroughness of the curing is notalways certain, such meat should also be cooked before it is eaten. The trichinae are not particularly resistant, being killed at 155° they are not encapsulated, otherwise at 158° to 160° F.; that is, theyhave about the same resistance as non-sporulating bacteria. Trichina larvae die in 20 days at a temperature not higher than5° F. Eansom ^ di-sproved the notion formerly held that the larvaeof Trichinella spiralis are very resistant to cold. He recommends thatmeat should be refrigerated at a temperature
. Preventive medicine and hygiene. cerned, but as the thoroughness of the curing is notalways certain, such meat should also be cooked before it is eaten. The trichinae are not particularly resistant, being killed at 155° they are not encapsulated, otherwise at 158° to 160° F.; that is, theyhave about the same resistance as non-sporulating bacteria. Trichina larvae die in 20 days at a temperature not higher than5° F. Eansom ^ di-sproved the notion formerly held that the larvaeof Trichinella spiralis are very resistant to cold. He recommends thatmeat should be refrigerated at a temperature not higher than 5° F. fornot less than 20 days, a period which allows a probable margin ofsafety of 10 days. Whether temperatures higher than 5° F. may besafely employed by lengthening the period of refrigeration, remainsto be determined. It is, therefore, evident that refrigeration and time ^k^cience, New York, January 30. 11)14. Vol. XXXTX. p. 181, and The Journalof Agricultural Research, Vol. V, No. 18, January 31, 632 ANIMAL FOODS: MEAT, FISH, EGGS, ETC. are better safeguards than microscopic examination. The combinationof refrigeration and thorough cooking would protect man againsttrichinosis. The rat and the hog should be regarded as the common reservoir oftrichinae; a persistent warfare should be made against rats in slaughterhouses, butcher shops, markets, and places where hogs are kept (see page267).—Human feces and contaminated offal must not be fed to hogs. The Pork or Measly Tapeworm (Taenia Solium).—Taenia soliumpasses the larval stage of its life history in the flesh of pork. Theseencysted larvae are known as bladder worms or Cysticercus cellulosae; they are commonly Man (Tenia Solium) n t i i called pork eats these encystedlarvae which developinto adult tapewormsin the intestinal with thistapeworm may be par-ticularly dangerous, be-Man cause the cysticerci Su-fle {Cysticercua Cellulosae) ],„„„ j-i, nprnHaritv (.
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