| yersinia ssp. in surface water in san luis, argentina. | yersinia spp. was examined in three rivers and two lakes located in the province of san luis, argentina, over a 1-year period. water samples were concentrated either by moore's gauze technique or by filtering through diatomaceous earth. five enrichment media: yeast extract--bengal rose broth (yer) with bile-oxalate-sorbose broth (bos); 67 mmol/l phosphate-buffered saline (ph 7.6; pbs); pbs enriched with a 1% mannitol and 1% peptone (pbsmp); pbs with lyzed 0.5% sheep blood (pbsb); wauters broth ( ... | 1994 | 8549992 |