Ascaris suum: Nutrient absorption,growth, and intestinal pathology in young pigs experimentally infected with 15-day-old larvae |
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Authors: | LS Stephenson WG Pond MC Nesheim LP Krook DWT Crompton |
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Institution: | 1. Division of Nutritional Sciences, Cornell University, Ithaca, New York 14853, U.S.A.;2. Department of Pathology, New York State College of Veterinary Medicine, Cornell University, Ithaca, New York 14853, U.S.A.;3. Molteno Institute, Downing Street, Cambridge CB2 3EE, England |
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Abstract: | Three-week-old pigs on high (HP) or low (LP) protein diets were infected with 15-day-old Ascaris suum larvae (W). Including noninfected pigs (C), the experimental groups were HPW, LPW, HPC, and LPC. After 8 weeks, worm burden in the intestine averaged 42 in LPW and 31 in HPW. Nitrogen balance during Week 4 showed nonsignificantly less nitrogen absorption and retention in LPW compared to LPC. A similar, nonsignificant decrease in fat absorption was recorded in LPW vs LPC and in HPW vs HPC. The weight of the small intestine was significantly greater in W than C pigs but did not differ because of protein level. The weight correlated positively to worm burden and the increase was due mainly to hypertrophy of the tunica muscularis (muscle layers). |
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Keywords: | Nematode parasitic Swine Feed efficiency Nitrogen balance Fat absorption Intestinal pathology |
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