Behaviour of marine microflora towards antibiotics - I. Sensitivity towards chlorotetracycline (CTC)
Behaviour of marine microflora towards antibiotics - I. Sensitivity towards chlorotetracycline (CTC)
Date
1971
Authors
Surendran, P. K.
MahadevaIyer, K.
Journal Title
Journal ISSN
Volume Title
Publisher
Society of Fisheries Technologis(India)
Abstract
The sensitivity of 61 cultures of bacteria isolated from
!fish towards chlortetracycline (CTC) at 5 ppm and 20 ppm levels
lhas been determined on two solid media, viz; sea water agar (SW A)
and a distilled water based medium consisting of peptone, beef
extract, glucose and NaCI (PBGA). The cultures employed consisted
of (i) gram-negative rods of marine origin viz; Achromobacler,
Pseudomonas, Vibrio and Flavobacterium and (ii) gram positive orga•
nisms viz; Micrococci and Corynebacterium. Depending on the
inhibition zone diameter, the order of CTC sensitivity was found
to be Pseudomonas < Vibrio < Achromobacter as determined on
PBGA at CTC levels of 5 and 20 ppm. The SWA enhanced the
development of resistance in majority of the cultures as compared
to PBGA. PBG broth containing CTC at less than 10 ppm
exerted a bacteriostatic effect only while that containing 10 ppm
or more exerted a bactericidal effect on Achromobacter, Pseudomonas
and Micrococci cultures. The significance of these results in fish
preservation by CTC is discussed.
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Citation
Fish Technol.8(2):128-132