Evidence for Environmental Factors, Including Presence of Heavy Metals, Involved in Converting Potential Pathogens to a Viable But Nonculturable State in River and Estuarine Water
Final rept. Aug 89-Sep 90,
MARYLAND UNIV COLLEGE PARK DEPT OF MICROBIOLOGY
Pagination or Media Count:
A possible effect of heavy metals on the presence of Aeromonas spp. in polluted waters was observed when chemical analyses were performed on 14 water samples. Aeromonas spp. were isolated in 13 93 of the 14 samples where the concentration of copper and zinc was lower than 80 micron gL. No Aeromonas spp. were isolated in samples where copper and zinc concentrations were 130 micron gL. We were able to isolate Aeromonas spp. from the same site 1 week earlier when the concentration of copper and zinc was 50 micron gL and 40 micron gL, respectively. These results suggest that Aeromonas spp. may enter a viable, but nonculturable state as a response to toxic effects of copper and zinc in polluted waters.
- Water Pollution and Control