E4 Quiz Host-microbe interactions Flashcards
a positive and obligatory relationship for both organisms
Mutualism
Ex: eukaryotic cells + mitochondria
Ex: infants and vitamin A producing bacteria
Mutualism
A positive relationship for both organisms
- Non-Obligatory
Synergism
Ex: Normal body flora
Synergism
Ex: Humans and bacteria in our digestive tracts
Synergism
Ex:
1. bacteria synthesize growth factors
Vitamin B12, K, Niacin, Thiamin, Riboflavin, Folic acid
Synergism
Ex:
2. Assist with the breakdown of fibrous wastes
Synergism
Ex:
3. Stimulate development of the immune system
Synergism
When a relationship is positive for one organism, and neutral for the other organism (normal body flora)
Commensalism
Ex: Microbes on our skin that consume skin secretions
Commensalism
Ex: lactic acid bacteria that lower pH of female reproductive tract
Commensalism
When one organism benefits and the other is harmed.
Ex: Disease
Parasitism
When both organisms are harmed (disease)
Competition
When microbes are present
Contamination
When microbes exist superficially as reproducing surface populations
Colonization
When microbes enter the tissue
Infection
- When there is noticeable impairment of body function
Disease
2a. Involves a microbe
Infectious Disease
2b. Does not involve a microbe
Noninfectious Disease
When an infectious disease can spread from one person to another
Communicable
When an infectious disease can NOT spread from one person to another
Non-Communicable
When a communicable disease is EASILY spread from host to host
Contagious Disease
Disease caused by microbes from OUTSIDE the body
Exogenous Disease
Disease caused by microbes already present in or on the body
Endogenous Disease
When a microbe can cause a disease only in hosts with impaired immune systems or when relationships become unbalanced.
Opportunistic Disease
+/+
Obligatory
Mutualism
+/+
Non Obligatory
Synergism
+/O
Communalism
+/-
Parasitism
-/-
Competition
