Urinary tract infection is the most common urinary tract problem in children besides bedwetting. Urinary tract infection is second only to respiratory infection as the most common type of infection. These infections are much more common in girls and women than in boys and men younger than 50 years of age.
Prokaryotic Cells Bacteria are examples of the prokaryotic cell type. An example is E. coli. In general, prokaryotic cells are those that do not have a membrane-bound nucleus. In fact pro-karyotic is Greek for before nucleus. Besides bacteria, the cyanobacteria (blue-green algae) are a major group of prokaryotes.
Bacteria (one of them is a bacterium) are very small organisms. They are prokaryotic microorganisms. Bacterial cells do not have a nucleus, and most have no organelles with membranes round them. Most have a cell wall. They do have DNA, and their biochemistry is basically the same as other living things.