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Chain of infection; the chain of events that lead to infection. There is a general chain of events that applies to infections, sometimes called the chain of infection [14] or transmission chain. The chain of events involves several steps – which include the infectious agent, reservoir, entering a susceptible host, exit and transmission to new ...
The following outline is provided as an overview of and topical guide to concepts related to infectious diseases in humans.. Infection – transmission, entry/invasion after evading/overcoming defense, establishment, and replication of disease-causing microscopic organisms (pathogens) inside a host organism, and the reaction of host tissues to them and to the toxins they produce.
An infectious disease agent can be transmitted in two ways: as horizontal disease agent transmission from one individual to another in the same generation (peers in the same age group) [3] by either direct contact (licking, touching, biting), or indirect contact through air – cough or sneeze (vectors or fomites that allow the transmission of the agent causing the disease without physical ...
Infectious agent Common name Diagnosis Treatment Vaccine(s) Acinetobacter baumannii: Acinetobacter infections Culture Supportive care No Actinomyces israelii, Actinomyces gerencseriae and Propionibacterium propionicus: Actinomycosis: Histologic findings Penicillin, doxycycline, and sulfonamides: No Adenoviridae: Adenovirus infection
The infection of a disease begins when a pathogenic (disease-causing) infectious agent, or a pathogen, is successfully transmitted from one host to another. [3] Pathogens leave the body of one host through a portal of exit , are carried by some mode of transmission and after coming into contact (exposure) with a new susceptible host, they enter ...
In biology, a pathogen (Greek: πάθος, pathos "suffering", "passion" and -γενής, -genēs "producer of"), in the oldest and broadest sense, is any organism or agent that can produce disease. A pathogen may also be referred to as an infectious agent, or simply a germ. [1] The term pathogen came into use in the 1880s.
The serial interval in the epidemiology of communicable (infectious) diseases is the time between successive cases in a chain of transmission. [1]The serial interval is generally estimated from the interval between clinical onsets (if observable), in which case it is the 'clinical onset serial interval'.
He agreed, citing Rao, Fenner and others, that “careful epidemiologic investigation rarely implicated fomites as a source of infection”; and broadly agreed with current recommendations for control of secondary smallpox infections, which emphasized transmission via “expelled droplets” upon the breath. He noted that shed scabs (which ...