If your dog has a bacterial infection, it would be best for your dog to see your vet. They can prescribe them antibiotics to help clear this infection. If they have a skin infection or wound, your vet may also want to send home shampoos or ointments for you to also use on your dog. Make sure that you follow the direction from your vet to help your dog quickly recover from their bacterial infection.
For a really bad infection, your vet may take a sample of their skin, urine, or discharge from their ears or eyes. They can send these samples to the lab to see what bacteria is growing and what bacteria will treat these infections.
If your dog has recently been diagnosed with a bacterial infection, or if your think that your dog has a bacterial infection, it would be best for your vet to help them get better. Your vet can prescribe medication to help quickly clear this infection. In severe cases, your dog may need a culture to make sure that they do not have a resistant bacterial infection. With the proper treatment and care, your dog can quickly recover from these infections.