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.
Bacterial organelles are not enclosed in a membrane as plant cells are. Instead, they float around in a jelly-like substance called cytoplasm inside of the bacterial cell. Plant cells are much more complex and have several organelles that bacteria do not. Plant cells and bacteria cells, however, do have a few organelles in common.