The maximum zone i.e. 9.0 mm was REFERENCES
given by SR H while 35 C and PJ 2 showed the clear zone
of 7.0 mm. SR H, staphylococcus species, has shown
moderate activity against S. aureus. This can be due to
the inherit defense mechanism of a strain to secret
antimicrobial agents such as bacteriocins that prevent
the growth of other strains of the same specie [18].
Gram positive bacteria especially certain species of
staphylococcus are also known to exhibit ability to
produce such antimicrobial agents like colicin by E. coli
against other strains such as ColN and ColE1 against
E. coli F4 (K88) [26, 27]. For E. coli 7, the isolates which
showed activity were SD C and PI 2 by forming a clear
zone of 11 mm and 10 mm respectively. For K. pnumoniae
ATCC 700603, SRH and 35 C were the only to show high
activity by giving zone of inhibition of 15 mm and 17 mm
respectively. None of the 15 isolates showed any kind of
activity against P aeruginosa. For E. fecalis ATCC 29212,
out of the 15 isolates only 6 isolates showed activity.
The highest zone of inhibition was given by 1 C i.e. 18mm
while 35 C gave the lowest zone of 11 mm