<prompt> Metronidazole is LEAST likely to be effective in the treatment of:Hepatic amoebiasisInfection caused by Bacteroides fragilisPseudomembranous colitisPneumocystosis  <response>: Metronidazole is not used in the treatment of Pneumocystosis Its DOC is trimethoprime sulfomethoxazole Cotrimoxazole METRONIDAZOLE G - GIARDIASIS U - PEPTIC ULCER P - PMC T - TRICHOMONIASIS A - ANAEROBIC BACTERIA AMEOBIASIS 