What category of medicine is used to treat pathogens, or disease-causing microorganisms?

Antibiotics. The literal meaning of the name is "opposing life". The first antibiotic (Penicillin) was identified by Alexander Fleming in 1928 and revolutionized medicine in the 20th century. Antibiotics are loosing their effectiveness because of drug-resistance which is increasing because of overuse.

The answer would be a

1.)dr. natterson- horowitz came to realize that their isn't much of a difference between animals and humans. just like humans, animals can suffer from illnesses and diseases like breast cancer, self injury, anxiety, and many more. she also discovered how they even treated and performed surgical procedures on animals just as if the animal it self were human. the los angeles zoo called dr. natterson- horowitz because they knew that she was a doctor and that  she would be able to recognize what was wrong with the gorilla. they knew that humans and gorillas were similar, so instead of calling another veterinarian, they called a doctor.