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