BMD 402 Lecture 10: TEST 2 P1

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Published on 2 Mar 2017
School
USA
Department
Biomedical Sciences
Course
BMD 402
Professor
CONCEPTS IN HOST-PARASITE RELATIONSHIPS
Host - organisms on or in which a microbe establishes a relationship
Symbiosis - long term relationship where both the microbe and host live together
Types of Symbiosis
Mutualism - Host and microbe both benefit and neither are harmed
Commensalism - Microbe benefits but neither are harmed
Parasitism - microbe benefits and the host IS harmed
Parasite - benefiting microbe is a pathogen
Colonization - adherence of commensal/pathogens to a host surface
Infection - a microbe invades and multiplies in host tissue
Asymptomatic Host - carrier/infected host
Symptomatic Host - diseased host
Disease - host responds to the infecting pathogen/ toxic products
CONCEPTS IN EPIDEMIOLOGY
Communicable - capable of being transmitted from an infected individual to another uninfected
individual
It is now contagious
Non-Communicable - disease that is not typically transmitted from an infected individual to another
uninfected individual
Opportunistic pathogens
Person appears infected, but pathogen is gone and the toxins that produce the symptoms is what
actually remains
Both communicable and non-communicable disease may involve:
Vector: Living transmitter of a pathogen
Reservoir: long-term natural source of a pathogen
Carrier : a host that carries the pathogen as asymptomatic or chronic infection
Endemic - presence of infectious agent or disease at a low but constant morbidity in a region or group
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Document Summary

Host - organisms on or in which a microbe establishes a relationship. Symbiosis - long term relationship where both the microbe and host live together. Mutualism - host and microbe both benefit and neither are harmed. Commensalism - microbe benefits but neither are harmed. Parasitism - microbe benefits and the host is harmed. Colonization - adherence of commensal/pathogens to a host surface. Infection - a microbe invades and multiplies in host tissue. Disease - host responds to the infecting pathogen/ toxic products. Communicable - capable of being transmitted from an infected individual to another uninfected individual. Non-communicable - disease that is not typically transmitted from an infected individual to another uninfected individual. Person appears infected, but pathogen is gone and the toxins that produce the symptoms is what actually remains. Carrier : a host that carries the pathogen as asymptomatic or chronic infection.