All about infections (chp2)

*continus sources of infection (can be humans, animals, environment)

a disease that occurs primarily in wild and domestic animals (via bite, toxins, soil)

*incidence (% of pop that contracts in a given time)
*Prevalence (chronic conditions, those who have disease in a given time)

*Vehicle
*Vectors

*(inanimate) food, air, and water

*it's what houses the disease

*mechanical (anthropod carries pathogen on the feet)
*Biological, pathogen reproduces in the vector (within the fly)

*rat=reservoir (not vehicle because it's living)
*flea= vector

nosocomial infection

opportunistic

*healthcare personal, other infected pts, visitors

*medical devices
*airborne

*localized
*systemic
*sepsis
*blood (-emia)

infection isolated to one part

infection is throughout body (wide spread)

infection (systemic inflammation)

infectious dose, how much pathogen exposure until half of those exposed are sick

-study of distribution and causes of disease

*% of people who become ill after expsoure to infectious agent

% of population that contracts disease in a specific time frame (ussually acute infections)

*in terms of chronic conditions, the fraction of population that has the disease at a given time

*disease occurs occasionally in pop

disease constantly present in pop

*disease acquired by many hosts in a short time

worldwide disease