1. Escherichia coli (E. coli): This is a very common bacterium found in the intestines of humans and other animals. While some strains are harmless, others can cause food poisoning.
2. Cyanobacteria: Also known as blue-green algae, these photosynthetic bacteria are important primary producers in aquatic ecosystems.
3. Salmonella: A genus of bacteria that can cause food poisoning in humans. Salmonellosis is a common illness with symptoms like diarrhea, fever, and abdominal cramps.
