Question

My topic is about E. Coli

Growth conditions. E coli is my topic. Host cells, nutritional needs, growth conditions. Use the relevant vocabulary discussed in this class: nutritional needs - phototroph, chemotroph, autotroph, heterotroph; growth conditions- barophile, halophile, psychrophile, etc. pathogen like mammals, birds, reptiles or secondary hosts in protozoan parasites. Types of life cycle- lytic or latent. Include how it relates to the information covered in class- which chap number and what was taught.

Answer 1

E.Coli

Host cells:- gut flora

belongs to enterobactericea

gram negative rod

nutritional needs,

growth conditions : aerobic and facultative anaerobe

it reacts with indole and methyl red --> it is both chemo and heterotrophic microorganism

optimum temperature for growth 37 degree celesius

tolerates bile salt-- it is a halophile

it is heat labile

grows on Mac Conkey AGAR turns pink due to lactose fermentation

antigenic structure:- O-somatic

H flagellar

K capsular

K --> responsible for virulence

Types of life cycle- lytic or latent

reproduces by two means: cell division, and the transfer of genetic material through a sex pilus this process called conjugation--> lytic phase