Flow Chart- Transmission Cycle Dropbox Assignment instructio…

Flow Chart- Transmission Cycle Dropbox Assignment (40 pts) Instructions

Zoonotic and Vector-borne diseases result from the interaction of agent, host, and environment. Transmission occurs when the agent leaves its reservoir or host through a portal of exit, it is conveyed by some mode of transmission, and enters through an appropriate portal of entry to infect a susceptible host. This sequence is sometimes called the chain of infection or the cycle of transmission. For this assignment select a zoonotic or vector-borne disease from Table 5-1 (page 96) in our text, and create a flow chart demonstrating the cycle of transmission. Be sure to include the 7 categories numbered below. Add detail as necessary to clearly show the process of transmission. You can use pictures and or text, as long as the flowchart clearly represents the seven categories below. Conclude with Implications for Public Health by providing a minimum of three bullets outlining methods of controlling or eliminating the cycle of transmission (example; vaccinations, hand washing, universal precautions, etc.). I have attached two basic flow chart examples.

1. Reservoir

Human

Animal (zoonosis)

Environmental (Plants, soil, and water)

1. Portal of exit

The path by which the pathogen leaves its host.

1. Mode of transmission

Direct

Direct contact (skin-to-skin contact, kissing, and sexual intercourse)

Droplet spread (direct spray carried by dust or droplet nuclei suspended in air)

Indirect

Airborne (material that has settled on surfaces and become re-suspended by air currents)

Vehicles (include food, water, biologic products (blood), and fomites (inanimate objects such as handkerchiefs, bedding, or surgical scalpels)

Vectorborne (such as mosquitoes, fleas, and ticks may carry an infectious agent)

1. Portal of entry

The portal of entry refers to the manner in which a pathogen enters a susceptible host

1. Host

The final link in the chain of infection is a susceptible host. Susceptibility of a host depends on genetic or constitutional factors, specific immunity, and nonspecific factors that affect an individual’s ability to resist infection or to limit pathogenicity. An individual’s genetic makeup may either increase or decrease susceptibility.

1. Implications for Public Health

Three Interventions directed at controlling or eliminating cycle of transmission.