A healthcare provider may do various tests, including blood tests and special x-rays, to search for a cause of a weakened immune system. Almost any infection may lead to death if the immune system cannot fight it off. A person with an immunodeficiency disorder may have infections that can be spread to other people. Aggressive antibiotic treatment is needed to quell most infections. There may be no treatment for the underlying disorder, though.
Antibiotics can cause allergic reactions and stomach upset.
Other side effects depend on the antibiotic used. Most of these disorders are long-term problems. Repeated treatment for infection and monitoring are needed. A person who has one of these disorders should see a healthcare provider at the first sign of a possible infection. Otherwise, the type of monitoring done depends on the disorder.