Tatsuo Kaneko1, Rita R. Colwell1
1Department of Microbiology, University of Maryland, College Park, Maryland 20742
Tóm tắt
A Bay-wide survey of the distribution of
Vibrio parahaemolyticus
was carried out in Chesapeake Bay during May 1972, to determine whether the annual cycle of
V. parahaemolyticus
which was observed to occur in the Rhode River subestuary of Chesapeake Bay took place in other parts of Chesapeake Bay. In an earlier study, April to early June, when the water temperature rises from 14 to 19 C, was found to be a critical period in the annual cycle of the organism in the Rhode River, since this is the time period when the annual cycle is initiated. Results of this study, however, revealed that
V. parahaemolyticus
could not be found in the water column during May 1972. Neverthless, several samples of sediment and plankton yielded
V. parahaemolyticus
isolates. Comparison of data with those for the Rhode River area examined in the earlier studies of the annual cycle of
V. parahaemolyticus
suggests that the time of initiation of the annual cycle of
V. parahaemolyticus
in the open Bay proper may be influenced by various factors such as temperature and salinity, i.e., deeper water locations may show initiation of the
V. parahaemolyticus
annual cycle later than shallow areas. Confirmation of the presence of the organism in the samples studied was accomplished using numerical taxonomy with 19 reference strains also included in the analyses.
