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Appl Environ Microbiol. 1975 November; 30(5): 771-780
Copyright © 1975 American Society for Microbiology. All Rights Reserved.

Seasonal Occurrence and Distribution of Microbial Indicators and Pathogens in the Rhode River of Chesapeake Bay

Department of Microbiology, University of Maryland, College Park, Maryland 20742

ABSTRACT

The seasonal incidence and occurrence of indicator organisms and pathogens were studied at four sites in the Rhode River, a subestuary of Chesapeake Bay. The highest frequency of occurrence of total and fecal coliforms and fecal streptococci was in Muddy Creek, a marsh area receiving pasture land runoff. Second highest frequency of occurrence of these bacteria was in Cadle Creek, a populated area. Lowest measurements of these parameters were obtained at stations in the central portion of the Rhode River. No Salmonella spp. were detected by the methods employed in this study. However, it is concluded that if these organisms are present, the concentrations are 1 organism per liter. The presence of Clostridium botulinum was detected in 12% of the samples tested.

¹ Present address: Department of Microbiology, Rutgers University, New Brunswick, N.J. 08903.