Bacteria is one of the most popular residents both on and inside our body. Most of the bacteria that are present are completely harmless and in some cases is even beneficial to us. Some examples of harmless bacteria that live on the skin are staphylococcus species, Acinetobacter, Corynebacterium spp., Brevibacterium etc. However, the problem arises when bacteria starts to penetrate the normal skin or enters the body through broken skin. Just like viruses, a bacterial infection can also end up in the formation of rashes.
Many bacteria are capable of causing an infection on the skin. However, the ones those are most commonly responsible for these diseases would be staphylococcus and streptococcus. When caused by lesser common bacteria, we could assume with a good probability that the place of origin would be hospitals, nursing homes, and activities like gardening, swimming in a pond, lake or an ocean.
Bacterial skin infections affect different people in different ways. They prey much more easily on people with weaker immune systems and thereby lower resistance. In the case of people with diabetes, the blood flow towards hands and feet is less. The ability of white blood cells to fight infections is also greatly reduced because of the high glucose levels in the blood. So they can be a victim of these diseases easily when compared to a healthy person. Resistance is also low in older people, as the power of the immune system decreases with age. People who have HIV or AIDS, hepatitis, other immune disorders or taking up treatments that suppress the immune system are more susceptible to these bacterial skin infections.
Various tests are done in order to identify these bacterial infections. Some of the tests include full blood count (as these infections tend to increase the number of neutrophils), a C-reactive protein which in case of serious bacterial infections will have an indication above 50 etc. If the person is suffering from high fever, above 38C, a blood culture will be set up.