| Description | Acinetobacter haemolyticus is a Gram-negative, coccoid-shaped bacterium that thrives in moderate temperatures, classifying it as a mesophile. This microbe is a chemoheterotroph, deriving its energy from organic compounds, and functions as a facultative anaerobe, meaning it can grow in both aerobic and anaerobic conditions. It can be found across various body sites, including the skin, respiratory tract, and gastrointestinal tract, contributing to its role as a commensal organism in humans. The Gram-negative characteristic of Acinetobacter haemolyticus means that it has a thin peptidoglycan layer surrounded by an outer membrane containing lipopolysaccharides, which can trigger immune responses in the host. Its coccoid shape allows it to survive in diverse environments, and as a mesophilic organism, it prefers temperatures around 30-37 degrees Celsius, consistent with the human body temperature. As a chemoheterotroph, it is reliant on organic materials for its energy needs, utilizing nutrients from the host or its environment. Facultative anaerobes like A. haemolyticus have versatile metabolic capabilities, allowing them to switch between aerobic respiration and fermentation depending on oxygen availability. This adaptability aids in colonization and survival in various body niches, contributing to its presence in clinical settings, particularly in patients with compromised immune systems. Acinetobacter haemolyticus has garnered attention in recent years due to its potential pathogenicity, often associated with healthcare-associated infections. It is notably resistant to multiple antibiotics, posing challenges in treatment and control within hospital environments. This adaptability and resistance highlight the importance of stringent infection control measures in healthcare settings to mitigate the risks posed by this opportunistic pathogen. |
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