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Jun 11, 2019 · The 6 links in the chain of infection. 1. The pathogen. The first link in the chain of infection is the infectious agent or pathogen which can take the form of: Viruses – such as Influenza A, shingles and Hepatitis. Bacteria – including Lyme disease and Leptospirosis. Fungi – for example Candidiasis and Aspergillosis.
Figure 4.1 Chain of Infection. The links in the chain of infection include Infectious Agent, Reservoir, Portal of Exit, Mode of Transmission, Portal of Entry, and Susceptible Host [2]: Infectious Agent: Microorganisms, such as bacteria, viruses, fungi, or parasites, that can cause infectious disease. Reservoir: The host in which infectious ...
The final link in the chain of infection is a susceptible host, the organism or person at risk for infection. The degree to which a host is at risk is dependent on their immunity and ability to resist or limit susceptibility.
- Reservoir. The reservoir of an infectious agent is the habitat in which the agent normally lives, grows, and multiplies. Reservoirs include humans, animals, and the environment.
- Portal of exit. Portal of exit is the path by which a pathogen leaves its host. The portal of exit usually corresponds to the site where the pathogen is localized.
- Modes of transmission. An infectious agent may be transmitted from its natural reservoir to a susceptible host in different ways. There are different classifications for modes of transmission.
- Portal of entry. The portal of entry refers to the manner in which a pathogen enters a susceptible host. The portal of entry must provide access to tissues in which the pathogen can multiply or a toxin can act.
Dec 7, 2023 · The final link in the chain of infection is the susceptible host, who is an individual that is vulnerable to the pathogen. This includes individuals with weakened immune systems, as well as those who consume contaminated food or water. Preventing foodborne illnesses requires a multi-faceted approach.
The chain of transmission, also referred to as the chain of infection, describes the infection process. There are six links in the chain: Infectious Agent; Reservoirs; Portal of Exit; Modes of Transmission; Portals of Entry; Susceptible Host (PIDAC, 2012) You need to understand how an infectious agent travels throughout the cycle to determine ...
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Dec 7, 2023 · Understanding the sequence of infection transmission is crucial in developing effective protocols to prevent the spread of diseases. While there are various factors that contribute to the order in which an infection chain is formed, environmental factors play a significant role. 1. Environmental Conditions.
