What term is used to describe illnesses arising from the transmission of infectious agents from infected hosts to susceptible individuals?

The term "communicable diseases" accurately describes illnesses that are spread from infected hosts to susceptible individuals through various mechanisms such as direct contact, indirect contact, airborne transmission, or vector-borne pathways. These diseases are characterized by their ability to be transmitted from one person to another, indicating a clear link between the host who is infected and others who might contract the illness.

This concept is crucial in public health as it highlights the importance of preventive measures, such as vaccinations, sanitation, and quarantine methods, to control the spread of these diseases. Understanding communicable diseases allows health professionals to implement strategies to minimize transmission and protect the public’s health effectively.

The other choices do not fit this definition: genetic disorders are caused by abnormalities in genes or chromosomes and are not transmitted from person to person; acute diseases refer to short-term illnesses that may not necessarily be infectious; chronic conditions involve long-lasting diseases that might not be infectious and do not involve a direct transmission from a host. Thus, the focus on the transmission aspect makes "communicable diseases" the correct term in this context.