1. Food poisoning: Bacteria such as Salmonella and E. coli can contaminate food and cause severe illness when ingested.
2. Infections: Bacteria can cause a wide range of infections in the body, including urinary tract infections, pneumonia, and skin infections.
3. Antibiotic resistance: Overuse of antibiotics can lead to the development of antibiotic-resistant bacteria, making infections harder to treat.
4. Dental decay: Bacteria in the mouth can contribute to the formation of plaque and cavities, leading to tooth decay.
5. Skin infections: Bacteria can cause skin infections such as cellulitis, impetigo, and boils.
6. Respiratory infections: Bacteria such as Streptococcus pneumoniae and Haemophilus influenzae can cause respiratory infections such as pneumonia and bronchitis.
7. Sexually transmitted infections: Bacteria such as Chlamydia, gonorrhea, and syphilis can be transmitted through sexual contact and cause serious health problems if left untreated.
8. Septicemia: Bacteria can enter the bloodstream and cause septicemia, a life-threatening condition that can lead to organ failure.
9. Meningitis: Bacteria such as Neisseria meningitidis and Streptococcus pneumoniae can cause meningitis, an infection of the membranes surrounding the brain and spinal cord.
10. Gastrointestinal infections: Bacteria such as Campylobacter and Clostridium difficile can cause gastrointestinal infections, leading to symptoms such as diarrhea, vomiting, and abdominal pain.