Medical Micro #2

Front 1

Koch's Postulates

Back 1

*Microorganism must be present in every case of infection
*Microorganism can be isolated in pure culture
*Inoculation of pure culture into animals produces a similar disease
*Same species must be recovered from diseased animal

***Problems: Viruses cannot be culutured, human diseases don't always infect animals.

Front 2

Pathogen

Back 2

Microogranism capable of causing an infectious disease

Front 3

Primary Pathogen

Back 3

A microorganism that regularly causes infection and disease when it enters a non-immune host. ie Anthrax, Gonorrhea, Leprosy

Front 4

Opportunistic Pathogen

Back 4

Microorganism that doesn't cause disease in healthy humans but may when a host who was a compromised defense.

Front 5

Infection

Back 5

Invasion and multiplication of microorganisms in a host. A disease process may or may not be present. May cause immune response. Symptoms may be subclinical

Front 6

Commensal or Colonization

Back 6

An organism living in or on a host where neither derives benefit or harm

Front 7

Symbiosis

Back 7

Both derive mutual benefit

Front 8

Parasitism

Back 8

Parasite benefits at expense of the host

Front 9

Virulence

Back 9

The degree of pathogenicity and extent to which a microorganism can cause damage to the infected host. ie capsules

Front 10

Carrier

Back 10

Host that does not exhibit symptoms because of either inherited traits or the organism is in the latent phase.

Front 11

Endogenous source of Disease Transmission

Back 11

Breaks in natural barriers(trauma,surgery,IV,catheters)

Front 12

Exogenous source of Disease Transmission

Back 12

Inhalation, Ingestion, direct contact,fomites (inanimate objects)