G+ bacteria takes crystal violet stain, this is because the thick peptidoglycan layer in the bacterial cell wall retains the colour. G- cannot take the stain, because of thin peptidoglycan layer.
Instead of thin peptidoglycan layer, the outer cell membrane in gram-negative bacteria has evolved as a protective mechanism against antibiotics selection.
Gram-negative bacteria are protected from some physical disturbance.
The gram-positive bacteria are more receptive to antibiotics.
Mycobacterium avium complex: a group of bacteria related to tuberculosis. It cause symptoms in person with weak immune response- it is considered an oppurtunistic infection. In case of HIV, MAC usually cause problems after CD4 counts get extremely low.
A combination of antibiotics are used for treatment. Clarithromycin, azithromycin and many others can be used.
Get Answers For Free
Most questions answered within 1 hours.