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Survey of Salmonellae in mesenteric lymph nodes, gallbladder wall and jejunum from healthy pigs slaughtered in Taiwan.

A study made in Taiwan showed that 23.3 per cent of healthy slaughter pigs were infected with salmonellae. Samples of gallbladder wall/liver, mesenteric lymph nodes and jejunum wall were found to yield salmonellae in 16.4, 5.2 and 11.6 per cent of cases respectively. Salmonellae isolated belonged to nine different serotypes, S. london being the serotype most frequently isolated (26.8%) followed by S. anatum, S. panama (16.1% each) and S. typhimurium (12.5%). Of the total number of salmonellae isolated 68.5 per cent were detected simultaneously on brilliant-green phenol-red lactose sucrose agar (BGA) and desoxycholate agar (DCA), whilst 18.5 per cent were detected only on DCA and 13 per cent only on BGA plates.