Complex sentence: Additionally, the inappropriate prescription of drugs can significantly contribute to resistant organisms; veterinarians prescribing antibacterial drugs in cases of viral infection, for instance, can lead to bacterial infections in which the organisms are resistant to previously prescribed medications.
Split into simpler sentences: Additionally, the inappropriate prescription of drugs can significantly contribute to resistant organisms. Veterinarians prescribing antibacterial drugs in cases of viral infection, for instance, can lead to bacterial infections in which the organisms are resistant to previously prescribed medications.