The most common pathogens responsible for nosocomial pneumonia in the ICU are: (A) Gram positive organisms, (B) Gram negative organisms, (C) Mycoplasma, (D) Viral infection
Answer is B. Mainly responsible organisms are acinetobacters which are Gram-negative aerobic bacteria. Ref: Ananthanarayan& Paniker&;s textbook of microbiology, 9th edition. Pg no.397