Identifying a causal agent involves a systematic approach, often based on epidemiological studies and laboratory investigations. Some key methods include:
Koch's Postulates: Historically, these criteria have been used to identify the microbial causes of diseases. Bradford Hill Criteria: These are a set of principles that help in establishing a causal relationship between a presumed cause and an observed effect. Molecular techniques: Methods like PCR, sequencing, and serology are used to identify and confirm the presence of a causal agent.
