Question

what part of a bacterium allows it to.pass genes for resistance to another bacterium ?

why is identification of the infective agent and the Kirby Bayer test for susceptibility necessary befire prescibing an antibiotic?

ways 2 prevent contamination of a culture when transferring bacteria between agar plates

Answer 1

1. Elements that allows to pass genes for resistance to another bacterium is bacterial plasmids.

2. Identification of the infective agent and the Kirby test for susceptibilty necessary before prescribing an antibiotic because to obtain an accurate diagnosis of infection, understanding the difference between empiric and definitive therapy ,understanding the drug characteristics that are peculiar to antimicrobial agents , recognizing the adverse effects of antimicrobial agents on the host.

3.A mixture of cells is spread over the surface of semi .solid , agar based nutrient medium in a petri dish such that few bacteria cells deposited at widely separated points on the surface of the medium and ,following incubation ,develop into colonies. So, a metal loop canbe reused multiple times and is utilised for streak-plating routine laboratory strains.