Can the medicine nitrofurantoin help treat a staph infection?

Nitrofurantoin:
It's used to treat UTIs caused by strains of E. coli, Proteus, Klebsiella or Enterocobacter. ... of Klebsiella and Enterocobacter and also Staph a. and enterococci.

This is different from Maso's Answer, but it depends on what Staph a. is. We all try to help

No nitrofurantoin will not help, bacause what have is a more serious "infection"... I will give you all the information.

Staphylococcus (Staph Infection)
MRSA (Methicillin-Resistant Staphylococcus aureus)

Staph Infection Diagnosis

Diagnosis of staph infections begins with attempting to culture the bacteria from an infected site. Any area with pus, crusty drainage, or blisters should be cultured. Blood from patients with sepsis, toxic shock, or pneumonia should be cultured. Standard microbiological techniques (growth on Baird-Parker agar plates and a positive coagulase test) identify staph. S. aureus lyses red blood cells in blood agar plates (hemolytic staph) while S. epidermidis does not (nonhemolytic staph).

All staph should be further tested to see if the bacteria are resistant to the antibiotic methicillin (and other antibiotics) and thus determine if the organisms are MRSA (methicillin resistant Staphylococcus aureus). This test is important as MRSA organisms are resistant to many antibiotics usually prescribed for staph infections.

Staph Infection Treatment
MRSA (Methicillin-Resistant Staphylococcus aureus)

Antibiotic therapy is still the mainstay of medical care for MRSA, but antibiotic therapy is complicated by MRSA's antibiotic resistance. Consequently, laboratory determination of MRSA antibiotic resistance and susceptibility is important to establishing effective antibiotic treatment. Definitive antibiotic therapy depends on using those antibiotics shown in microbiological tests (using Kirby-Bauer antibiotic discs on agar plates) to effectively reduce and stop MRSA growth. Once the antibiotic sensitivities of the patient sample are determined, the patient can be treated appropriately. Unfortunately, these tests take time (usually several days) before results are available.

The majority of serious MRSA infections are treated with two or more intravenous antibiotics that, in combination, often still are effective against MRSA (for example, vancomycin, linezolid, rifampin, sulfamethoxazole-trimethoprim, and others). Minor skin infections, however, may respond well to mupirocin (Bactroban). The earlier the appropriate diagnosis and therapy is instituted for MRSA, the better the prognosis.

Drainage of pus is the main surgical treatment of MRSA infections. Items that can serve as sources of infection (tampons, intravenous lines) should be removed. Other foreign bodies present that are likely sources of infection (for example, artificial grafts, artificial heart valves, or pacemakers) may need to be removed if appropriate antibiotic therapy is unsuccessful. Other areas that can harbor MRSA and may need surgical interventions are joint infections, postoperative abscesses, and osteomyelitis. This is not an all-inclusive list; any site that continues to harbor and seed MRSA into the patient and is not adequately treated by antibiotic therapy should be considered for surgical intervention. Drainage of pus needs to be followed by appropriate antibiotic therapy as discussed above.

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I wish nothing but the very best and that everyng works out fine for you... from a caring indivdual.