Phylogeny of Bacteria
Bacteria are single celled prokaryotic organisms. Prokaryotes are organisms which do not have a distinct nucleus or membrane bound organelles. Bacteria are small and reproduce quickly, meaning that they are very diverse. All humans host bacteria, but only some bacteria is harmful to humans. Since bacteria are so diverse, an infection can occur at basically any part of the body with varying effects. Generally, preventative measures are taken in order to avoid infection, however in the case of many of the bacteria parasites given below, antibacterial drugs can be taken in order to prevent spread.
Below I give six examples of bacterial parasites which commonly infect humans: bacterias that cause Lyme’s disease, tuberculosis, cholera, gonorrhea, strep throat, and E. coli. Each of these bacteria are in a different genus, which further highlights the diversity of bacteria.