Study Aid Worksheet over Host/Microbe Interaction and Disease Processes Flashcards
Host surface cell component that binds directly to the surface of a microorganism:___________
Receptors
Relationship that describes an interaction between different organisms that live in close association with each other:_________________________
Symbiosis
True or False: An individual can be infected but not diseased._______________
True
A microorganism that grows on the certain surfaces (internal and external) of the human body without producing harmful effects:____________________
Normal Flora
The ability to cause bodily injury by a pathogen is termed:________________________
Virulence
Projections from the surface of a microorganism that bind to a specific site on the host cell are called:____________________________
Ligands
Normal flora that can cause disease under certain circumstances are_____________________
Opportunists
____________________ infections are acquired in a clinical setting.
Nosocomial
A world-wide epidemic:__________________
Pandemic
A ______________ infection is contained to the wound site without spreading.
Local
Symptoms for a ___________________ disease may last for weeks, months, years, or for the life of the individual after the disease is contracted.
Chronic
The minimum number of bacteria that causes a disease is the ______________________
Infectious dose
Periodic cases of disease that occur in low levels in a population over time:______________________
Endemic level
Hollow protein tubes that allow for transfer of DNA between bacteria cells and can serve as an adhesion or ligand for the bacteria cell:__________________
Pili
__________________is an inanimate object that can serve as a vehicle of transmission of disease.
Formite
A gel-like structure on the external surface of the bacteria that protects against phagocytosis: _____________
Capsule
Protective enzyme common to skin, mucosal membrane surface, saliva, and tears:_____________________
Lysozyme
Place an X in the following chart if the property applies to endotoxins and/or exotoxins.
Property Endotoxins Exotoxins
A virulence factor
Can be denatured
Located in the cell wall
Heat sensitive
Can injure the host
Property Endotoxins Exotoxins
A virulence factor X X
Can be denatured X
Located in the cell wall X
Heat sensitive X
Can injure the host X X
Complete the following chart over the 3 types of symbiotic relationships between microorganisms and the human body. Place a + sign if the effect of the interaction is positive for the microorganism or human, place a - sign if the interaction is negative, place a 0 if interaction is neutral and give one example of each type of interaction.
Interaction Microorganism Human Example
Commensalism
Mutualism
Parasitism
Interaction Microorganism Human Example
Commensalism + O Staph on skin
Mutualism + + E.coli in colon
Parasitism + - All human Pathogens
