Antibiotics and antimicrobials
Antibiotics act against bacteria, while antimicrobial medicines also include antivirals, antifungals and antiparasitics. Using the terms interchangeably hides differences between pathogens. Activity against one bacterium does not establish activity against another; cell structures, entry pathways and susceptible biological processes help determine a drug’s range.
From natural products to medicines
Penicillin research turned microbial antibacterial substances into medicines through isolation, potency assays, safety and clinical investigation, followed by reliable production. Later products also included chemical modifications of existing molecules. Expansion involved chemistry, manufacturing, experimental design and health services rather than simply finding an organism with an interesting secretion.
References: [3]
Resistance belongs to microorganisms
Resistance means that microorganisms withstand drugs that would otherwise affect them; it is not a patient becoming immune to the medicine. Genetic changes and acquired resistance genes can contribute. Drug exposure influences survival and spread, while resistant organisms and mechanisms can move between people, animals and environments.
Effectiveness and public conditions
Infection prevention, surveillance, laboratory capacity and dependable access to medicines all affect resistance. Both inappropriate exposure and lack of access to appropriate products can create problems, so total consumption alone is an incomplete explanation. Antibiotic history concerns medical innovation together with public institutions sustaining effective treatment.