Which infections are third generation cephalosporins primarily used to treat?

Third-generation cephalosporins are primarily utilized for their effectiveness in treating severe community-acquired respiratory infections as well as nosocomial infections. This class of antibiotics has enhanced activity against Gram-negative bacteria compared to earlier generations, making them particularly useful in hospital settings where resistant organisms are more prevalent.

These antibiotics can penetrate well into the central nervous system and have a broader spectrum of action, which is critical when addressing severe infections such as pneumonia caused by resistant strains of bacteria. They are especially effective against organisms like Streptococcus pneumoniae and various Enterobacteriaceae, which are commonly implicated in respiratory infections.

In contrast, the other options do not align with the primary uses of third-generation cephalosporins. Skin infections and urinary tract infections (although sometimes treated with specific cephalosporins) are more often addressed with first or second-generation cephalosporins, while viral and fungal infections are not effectively treated with this class of antibiotics.