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 are single-celled organisms that lack a nucleus, mitochondria, chloroplasts, golgibodies and ER. Organisms are important to our existence as humans and all other living things evolved from them. Organisms can be classified into two categories: eukaryote and prokaryotes. Prokaryotes microorganisms can be further classified into three domains: eukarya, bacteria and archaea.