Infections caused by bacteria have a significant impact on human health. The disease can strike anywhere on the body, and it is produced either by the organism or by the body's reaction to its existence. Bacteria are spread to humans by air, water, food, and living vectors. Contact, airborne, droplet, vectors, and vehicular transmission are the most common mechanisms of bacterial transmission. Morbidity and mortality are dramatically reduced when preventive measures are used. Water treatment, animal and human immunization, personal hygiene, and safer sex practices are illustrations of such approaches. Antibiotic resistance is an increasing concern, necessitating careful usage of antibiotics.
