Effects of peat feeding on the performance and health status of fattening pigs and environmentally derived mycobacteria
2006
Trckova, M. | Zraly, Z. | Matlova, L. | Beran, V. | Moravkova, M. | Svobodova, J. | Pavlik, I.
The purpose of the present study was to investigate the effects of peat fed to weaned piglets as a supplement on their performance and health status and to assess the risk of the development of tuberculous lesions in lymph nodes and parenchymatous organs. Twenty Large White x Landrace pigs in equal numbers of barrows and gilts were used in the experiment. The experimental group was fed a diet containing peat in the dose of 80 g peat/kg dry matter for 30 days. A short-time feeding peat did not significantly affect the growth of pigs. From day 21, a statistically highly significant increase in the consumption of the experimental diet was recorded, however, without a positive effect on the growth of experimental animals. Feed conversion of both experimental and control diets was comparable. Biochemical analyses of the blood showed that peat feeding did not adversely affect the metabolic profile of the animals. No tuberculous or tuberculoid lesions were detected in any of the 20 slaughtered animals. Despite that, mycobacteria were isolated from 10 tissues of 5 pigs from the experimental group. One isolate was identified as Mycobacterium avium subsp. hominissuis (IS901- and IS1245+). Seven out of nine isolates were determined as M. fortuitum (n=2) and M. xenopi (n=5). Feeding of a peat supplemented diet to pigs may be considered as economically non-effective and risky.
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