In Bact. fragilis infection drug of choice is

C. i.e. (Clindamycin) (731 - KDT 6th)* CLINDAMYCIN. Potent lincosamide antibioticIt inhibits most gram positive cocci, C. diphtheriae, Nocardia Actinomyces, Toxoplasma* High activity against a variety of anaerobes especially Bact.fragilis*** AZITHROMYCIN - more active than other macrolides against H. influenzae* High activity is exerted on respiratory pathogens- Mycoplasma, Chla. pneumonia, Legionella, Moraxella and on others like Campylobacter, Ch. trachomatis, H. ducreyi, Calymm. granulomatis, N. gonorrhoeae.CLARITHROMYCIN - More active against sensitive strains of gram - positive cocci, Moraxella, Legionella. Mycopneumoniae and Helicobacter- pylori.