Show tittle little A pigs stunted by worm infestation tests show marked retarding of growth seldom are tanners farmers inclined to argue with scientists livestock specialists and others who keep warning that internal parasites are harmful to swine occasionally however a farmer fanner will pose the question how much injury is caused by worm infestation the answer to that question is provided in tests conducted by the bureau ol of animal industry to de 7 yi 4 AW A growth of this pi pig will be determined ter mined largely by number ot of worms present termine how much the growth of pigs is retarded by roundworms round worms ascaridis asca rids in carrying out the experiment the bureau used eight litter mate pigs eight weeks old feeding four of them infective roundworm eggs the other four which served as controls received no worm eggs after four months all eight pigs were weighed killed and examined for roundworms round worms none were found in the control pigs but the other four harbored 39 20 and 12 respectively growth of the four pigs that had ro roundworms round und worms at autopsy was less rapid than the tour four controls the pig with worms weighed 87 pounds less than at the time it was fed the worm eggs its control litter mate gained 96 pounds the pig with 39 roundworms round worms gained only 48 per cent as much as its control the one with 20 only 55 per cent as much as its control the growth of the pig with only 12 roundworms round worms was not retarded very much it weighed nearly as much as its control mate |