The chain of infection, if we think of it as an actual chain, is made up of six different links: pathogen (infectious agent), reservoir, portal of exit, means of transmission, portal of entry, and the new host. Each link has a unique role in the chain, and each can be interrupted, or broken, through various means.Click to see full answer. Similarly one may ask, what are the 6 chains of infection?No matter the germ, there are six points at which the chain can be broken and a germ can be stopped from infecting another person. The six links include: the infectious agent, reservoir, portal of exit, mode of transmission, portal of entry, and susceptible host.Also Know, what are the 5 stages of infection? The five periods of disease (sometimes referred to as stages or phases) include the incubation, prodromal, illness, decline, and convalescence periods (Figure 2). The incubation period occurs in an acute disease after the initial entry of the pathogen into the host (patient). Likewise, people ask, what is the infectious agent in the chain of infection? The Chain of Infection A series of events has to happen to enable germs (when we speak of germs in this section, this refers to bacteria, fungi and viruses) to cause infections in a person. We call this the ‘Chain of Infection’.What is the process of infection?Infection is the invasion of an organism’s body tissues by disease-causing agents, their multiplication, and the reaction of host tissues to the infectious agents and the toxins they produce. Infectious disease, also known as transmissible disease or communicable disease, is illness resulting from an infection.