Symptoms. 443 



Symptoms. In horses invagination produces on the whole 

 the same clinical picture as internal strangulation (see page 

 417). In invagination of the cecum into itself or into the colon 

 defecation is not entirely suppressed, or at least not continu- 

 ously; the animal may even survive; but after the violent symp- 

 toms have disappeared those of intestinal stenosis remain be- 

 hind (see page 389). 



Rectal examination often shows important differences l)e- 

 tween invagination and other intestinal displacements. Cir- 

 cumscribed meteorism is absent until the end, except in pro- 

 tracted cases, when all the intestines become moderately bloated. 

 In invagination of the small intestine into itself, the hand intro- 

 duced into the rectum feels a thick, elastic-firm, painful, sausage- 

 like body which may be wound up like a snail, of the consistency 

 of meat ; at other times a more or less fluctuating loop of intes- 

 tine in which, on firmer pressure, a sausagelike body may be 

 felt. Sometimes only the place of entrance can be reached, 

 where the intestine becomes thinned out to a cord and dis- 

 appears in a thick fleshy ring. In invagination of tlie ileum 

 into the cecum, one feels in the head of the cecum a body as 

 large as a wrist, somewhat tender, movable and of tough-elastic 

 consistency (Klett). Occasionally invagination of the cecum 

 into itself may be felt, or of the cecum into the colon. 



In those rare cases where invagination did not occur to- 

 wards the front and wdiere peristalsis did not cease in the por- 

 tions towards the anus soft hemorrhagic feces are seen. 



In cattle the clinical picture is also quite similar to that 

 found in internal strangTilation (see page 419). Kolb noticed 

 in one case stretching in urinating in the manner seen in male 

 horses. The feces are at first normal, later on they become 

 thinner and occasionally hemorrhagic; in the further course 

 defecation ceases, or glairy or bloody mucus and fibrinous 

 masses are voided under great efforts. Rectal examination re- 

 veals conditions similar to those found in the horse. 



In dogs the clinical picture of invagination differs from 

 that of internal strangulation only by difficult defecation and 

 bloody fetid feces are observed. The general condition, pulse 

 and respiration of the animals are little or not at all disturbed 

 for one or two days ; the appetite is, however, suppressed from 

 the start. Parent saw prolapse of the invaginated liowel at each 

 defecation in a young dog with invagination of the colon into 

 itself. Palpation of the abdomen reveals an elastic-firm, cylin- 

 drical, sometimes curved, painful body which can be moved 

 freelv in every direction. One can sometimes feel the conical 

 end of the invaginated part and on the other side the turning 

 point of the external tube of the sausagelike body (Fig. 50). 



In a case of Hutyra's the emaciated animal showed for a long time obstinate 

 bloating, the appetite "was diminished, ingested soup or milk was not expelled by 

 vomiting, daily defecation produced thin-fluid stools. The postmortem examination 

 showed a long-standing invagination of the colon. 



