AFRICA AMR Acinetobacter Acinetobacter baumannii Article CRAB Carbapenemase ESBL Ghana Gram negative bacterium Hospital environment Infection prevention and control NDM antibiotic sensitivity bacterial gene bacterial growth bacterial strain bla DIM 1 gene blaVIM 5 gene carbapenem resistance carbapenemase cefotaxime cross-sectional study environmental surveillance enzyme synthesis extended spectrum beta lactamase gene sequence infection control infection prevention meropenem