804 DOAIJD OF A(;KUrLTUl{E. 



intrrfcrc :is iimdi willi <lifr('sti(in as would an initatidii to tlic stoinadi 

 or small iiilcsliiic. Tlicy ai-c seldom jji-fsciit in larj;*-' (•noii;^!! numbers in 

 ilie inlestine to cause any noti(eal)le irritation, but no doubt in conjunc- 

 tion with other parasites, they lielp to a^'sravnto the symptoms of jiara- 

 sitism. 'i'he pi-: becomes infested tliroujxh the food sujiply. 



'I'he A\'liip A\'onn—T>es(Tiiit ion. —This worn), trichoceplialus ci'cnat us, 

 is commonly found in tlie larure intestines. It is about one and a half 

 inclu's in leniitli. Tlie anterior part of the Ixtdy is capillary and very 

 thin, the posterior jiart of the Ixidy suddeidy c.\i)andcd, thick and cylin- 

 drical in shape. The caudal extremity of tlie male is coiled, and a nundjer 

 of short spines are seen l)ehind and around the shoath of the spicule, 

 the point of Avhich is rounded. 



Method of Infection.- The jtii;- becomes infected by takinjr the egj?s 

 into the di.nestive tract aloup; with the feed or drink. The ojiiiH usually 

 contain well formed embryos which are said to develop into the adult 

 foim within the host in about four w^'ks. 



Symi»tonis.— No serious trouble is attributed to the Avhip woi-ni. When 

 numerous they no doubt cause considerable irritation and may aji.Ci'iivate 

 the symptoms in other parasitic affections. 



Treatment. — The same treatment as recommended for other forms is 

 indicated here. In addition rectal injections of soap.v wati'r can be 

 administered. 



The Kitlney Worm. — When a hog is paralyzed in its hind quarters 

 Tlie swine breeder usually calls the disease "kidney worm." This state- 

 ment may also be used Avhen tlie pig is not doing as Avell as it should. 

 A few years ago this parasite was claimed by some to cause hog cholera 

 and swine pla.gue. The origin of these statements is not reliable, and 

 the ])resence of the worm in these cases is only a coincidence. Most 

 investigators have never found the kidney worm in hogs paralyzed in 

 the hind itarts. but there is no reason why hogs in this condition should 

 be any more exempt from this worm than well hogs. 



Tlie kidney worm occurs in the fat around the kidney, in the kidneys 

 and sometimes in the liver. It is usually found in cysts or canals and 

 several may be seen in one cj^st. They more often occiir in pairs. 

 There seems to bo more connective tissue in the region of the cyst than in 

 the rest of the fat and it may contain pus. It is not uncommon to find 

 kidney worms in the pelvis of the kidney, and frequently its walls and 

 the ureter are intlamed and thickened. Sometimes the kidneys are 

 iiitiamed and contain abscesses. The latter condition, in the absence of 

 The kidney wcjrm, is not uncommon. 



Description.— The kidney worm, sclerostoms i)inguacola, is mottled, 

 but when seen against the fat appears dark colored. The body is cylin- 

 drical, plump and slightly tapering at both ends. The male is from an 

 inch to an inch and a half in length and about one twenty-fourth of an 



