Piglets hop, scurry and squeal their way to the far corner of the pen, eyeing an approaching human. “It shows that they're healthy animals,” Craig Rowles, the owner of a large pork farm here, said with pride.

Rowles says he keeps his pigs fit by feeding them antibiotics for weeks after weaning, to ward off possible illness in that vulnerable period. And for months after that, he administers an antibiotic that promotes faster growth with less feed.

Dispensing antibiotics to healthy animals is routine on the large, concentrated farms that now dominate American agriculture. But the practice is increasingly condemned by medical experts who say it contributes to a growing scourge of modern medicine: the emergence of antibiotic-resistant bacteria, including dangerous E. coli strains that account for millions of bladder infections each year, as well as resistant types of salmonella and other microbes..........Click for more

Source Web Page: The New York Times