But infectious bacteria can make you ill. They reproduce quickly in your body. Many give off chemicals called toxins, which can damage tissue and make you sick. Examples of bacteria that cause infections include Streptococcus, Staphylococcus, and E. coli.
https://medlineplus.gov/bacterialinfections.html
This medication is a combination of two antibiotics: sulfamethoxazole and trimethoprim. It is used to treat a wide variety of bacterial infections (such as middle ear, urine, respiratory, and intestinal infections). It is also used to prevent and treat a certain type of pneumonia (pneumocystis-type). This medication should not be used in children less than 2 months of age due to the risk of serious side effects. This medication treats only certain types of infections. It will not work for viral infections (such as flu).
http://answers.webmd.com/answers/1021131/what-conditions-does-bactrim-ds-treat
What’s the best antibiotic for Staph? The type, location and severity of your infection all help determine which antibiotic is best for you. Other factors that come into play when choosing a Staph antibiotic are: pregnancy, drug allergies, other medications being taken and other health risks.
https://www.staph-infection-resources.com/treatment/conventional/staph-antibiotics/
What antibiotic is best depends upon your infection’s location and severity, and ideally an antibiotic sensitivity test. There are many antibiotics that work for treating Staph infections, which are a common cause of doctor visits for skin and soft tissue infections.
https://www.staph-infection-resources.com/treatment/conventional/staph-antibiotics/
Unfortunately, Staph infections can sometimes turns into MRSA, which is a type of Staph that has become immune to common antibiotics. If MRSA does develop, special antibiotics for MRSA are the best conventional treatment option.
https://www.staph-infection-resources.com/treatment/conventional/staph-antibiotics/
Staph bacteria are very adaptable, and many varieties have become resistant to one or more antibiotics. For example, only about 10 percent of today's staph infections can be cured with penicillin.
http://www.mayoclinic.org/diseases-conditions/staph-infections/basics/treatment/con-20031418
Your doctor may perform tests to identify what type of staph bacteria is behind your infection, and to help choose the antibiotic that will work best. Antibiotics commonly prescribed to treat staph infections include certain cephalosporins, nafcillin or related antibiotics, sulfa drugs or vancomycin. Vancomycin increasingly is required to treat serious staph infections because so many strains of staph bacteria have become resistant to other traditional medicines. But vancomycin and some other antibiotics have to be given intravenously.
http://www.mayoclinic.org/diseases-conditions/staph-infections/basics/treatment/con-20031418
One of the best ways to make sure you get the best antibiotic is by getting a susceptibility test (or an antibiotic sensitivity test). This test will determine what antibiotics actually work against your particular type of Staph infection and it will guide your doctor to the best antibiotic choice.
https://www.staph-infection-resources.com/treatment/conventional/staph-antibiotics/
Antibiotics are the usual treatment. When you take antibiotics, follow the directions carefully. Each time you take antibiotics, you increase the chances that bacteria in your body will learn to resist them causing antibiotic resistance. Later, you could get or spread an infection that those antibiotics cannot cure.
https://medlineplus.gov/bacterialinfections.html
Bacteria are living things that have only one cell. Under a microscope, they look like balls, rods, or spirals. They are so small that a line of 1,000 could fit across a pencil eraser. Most bacteria won't hurt you - less than 1 percent of the different types make people sick. Many are helpful. Some bacteria help to digest food, destroy disease-causing cells, and give the body needed vitamins.
https://medlineplus.gov/bacterialinfections.html
what type of infections will bactrim treat
Sulfamethoxazole and trimethoprim are type of infections that will treat by bactrim.