EPIDEMIOLOGY TRIANGLE 4
Theepidemiologic triangle describes a model, which has been developed byscientists in an attempt to study health problems. The triangle helpsin understanding infectious diseases and their spread. The trianglecomprises of three vertices, which represents the agent, the host,and the environment (Nelson & Williams, 2014). The agent is alsoknown as the “what” of this triangle it indicates the causes ofthe disease. The host vertex is also referred to as the “who” ofthis triangle. It usually indicates the organism that harbors thedisease being studied.
Onthe other hand, the environment vertex indicates the externalfactors, which cause or permit the transmission of the disease. It isalso referred to as the “where” of this triangle. In addition,this triangle comprises of time time indicates the interaction ofthe host, agent and the environment. In some cases, this may be along period while in other cases it may take just a short period(Friis & Sellers, 2014). The model represented by theepidemiology triangle is the causation model. This is because itindicates the agent, host and environment leading to a certaininfectious disease.
Anexample relevant to this triangle entails the following:
EpidemiologicTriangle for TB
Agent–this will indicate the organism causing TB mycobacteriumtuberculosis (TB organism)
Environmentconditions that permit the transmission of TB. These will include
Hostthe organism harboring the disease will be an organism with
EpidemiologicTriangle for Malaria
Agent– the agent here is Plasmodium
Host– the host is human
Environment– the external factors leading to the transmission of the diseaseentails
Friis,R. H., & Sellers, T. A. (2014). Epidemiologyfor public health practice.Burlington, Mass: Jones & Bartlett Learning.
Nelson,K. E., & Williams, C. M. (2014). Infectiousdisease epidemiology: Theory and practice.Burlington, Mass: Jones & Bartlett Learning.