Diagnosis. Prophylaxis. 821 



swallowing. Some authors liave also noticed circumscribed 

 edema of the eyelids and feet. The temperature rises chiefly 

 at the time of the migration of the trichinae. 



Recovery is the rule; only after a very intense infection 

 is the result fatal. The symptoms continue on an average 4 to 

 6 weeks, that is, until the encapsulation of the young trichinae, 

 and then gradually cease. The encapsuled trichinae, which are 

 present in great numbers in the muscles, do not destroy the 

 function of the muscles in any way, and the animals eat and 

 grow afterwards just like healthy pigs. 



In dogs the symptoms are quite similar to those of trichinosis in 

 man (Dlugay). Dobbertin noticed severe eosinophilia in the blood, 

 which had arisen at the cost of the neutrophile leucocytes and occurred 

 at the beginning of the migration of the trichinae; the migration had, 

 however, outlasted it. 



Diagnosis. It was stated previously that trichinosis by 

 natural infection had hitherto never been diagnosed in living 

 swine, since the s}^nptoms are not always characteristic, and 

 besides other diseases with similar symptoms occur. In this 

 connection muscular rheumatism may be called to mind, but 

 here no signs of a violent intestinal affection precede the mus- 

 cular complaint. The diagnosis is facilitated if an infection 

 can be shown to have occurred. At times the affected muscle 

 may be harpooned or excised and may afford material for 

 examination. Since sexually mature trichinae occur in the 

 feces of infected animals, the feces should be examined micro- 

 scopically in suspicious cases. 



Prophylaxis. The carcasses of swine dead of trichinosis 

 should be destroyed by industrial processes, and the living 

 animals housed in places from which rats and mice are far re- 

 moved. In knackers' yards and slaughter houses the keeping 

 of swine should be forbidden where infection may arise through 

 offal and rats or mice. The annihilation of rats and mice is an 

 important factor in avoidance of the disease. 



Literature. Babes, Cbl. f. Bakt., 1906, XLII, 541.— Bahr, Z. f. Infkr., 1906, 

 TI, 62. — Dobbertin, tJber d. A^erhalten d. weissen Blutkorp. b. Hunde, tisw., Diss., 

 Leipzig, 1907.— Edelniann, Lehrb. d. Flhyg., 1907.— Hoyberg, Z. f. Tm., 1907, XI, 

 299, 455; 1908, XII. 26. — Joliiie, Der Tric-hinenschaner, 1907. — Ostertag, Biblio- 

 graphic d. Fleischbeschau, 1905 (complete Lit.).; Fleischbeschau, 1904. — Strose, Arb. 

 d. G.-A. 1909, XXXIII, 109 (Lit.). 



Trichinosis in Man. Man is infected by the use of raw or under- 

 done pork, or by dog flesh and, according to the number of trichinae 

 reaching his intestinal canal, either slightly or so severely that in certain 

 endemics 30% of cases may end fatally. The symptoms are for the 

 most part similar to those seen in experimentally infected animals. 

 Here also the disease begins in the second half of the first week, at 

 times earlier after infection, with acute catarrh of the stomach, the 

 patient suffering from loss of appetite, nausea and diarrhea, accom- 



