Post on 04-Apr-2018
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INTRODUCTION TO
PARASITOLOGY
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PARASITOLOGY
Is the area of biology concerned with thephenomenon of dependence of one living organism
on another.
The study of parasites, their hosts, and therelationship between them.
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PARASITE
An organism that lives on or in its host, which isusually a larger organism, that provides physicalprotection and nourishment.
An organism that has sustained contact withanother organism to the detriment to the hostorganism.
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FIELDS /BRANCHES OF
PARASITOLOGY
Medical parasitology
Veterinary parasitology
Structural parasitology Quantitative parasitology
Parasite ecology
Conservation biology of parasiteTaxonomy and phylogenetics
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PREDATOR those that attack another living animal, not
necessarily killing them. ( attacker)
PREY
They are the victim.
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HOST
The organism from which a parasite obtains itsnutrition and/or shelter.
Intermediate host- is used normally by a parasitein the course of its life cycleand it which it may multiplyasexually and but not sexually
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Definitive host- is the host in which the sexual
reproduction of parasite takes
place.
Reservoir host- is an organism in which aparasite that is pathogenic for
some other species, lives and
multiplies usually withoutdamaging its host.
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SCAVENGERS
Devouring those dead of natural causes or taking
the leavings of the predator.
SYMBIOSIS
Living together in more or less intimateassociation or close union of two dissimilarorganisms
From the Greek symbiosis which means the stateof living together.
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DIFFERENT FORM OF SYMBIOSIS
Commensalism
- means eating at the same table
- association that is beneficial to one partner
and at least not disadvantageous to theother.
- a relation between two kinds of organisms
in which one obtains food or other benefitsfrom the other without damaging it.
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SPECIALIZED TYPE OFCOMMENSALISM
Mutualism- association is beneficial to booth.
Parasitism- symbiotic relationship in which one
organism , the host is to somedegree injured thru the activities of
the other.
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VECTORS
Hosts that transmit parasites to man.
BIOLOGIC VECTORS
those that are essential in the life cycle.
PHORETIC OR MECHNICAL VECTORS
Those that are not essential in the life cycle.
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ZOONOSIS
Disease of animals (literally)
Disease of animals that are transmissible to manCLASSIFICATION OF ZOONOSIS
Euzoonosis- Common to man and reservoir
host. Parazoonosis- man is infrequent host and
incidental
Anthropozoonosis- infection acquired by manfrom other vertebrates.
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Zooanthroponosis- human infection that maybe
acquired by other vertebrates
Obligate parasite- cannot exist without the host
Facultative parasite- can be free living or parasitic
Amphizoic- free living amoeba that may invade
and colonize the brain and othersites( Naegleria and Acanthomoeba)
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Spurious- Free living parasites or organisms that
parasitize other hosts,
- they merely passed the intestine ,
- recovered in living or dead state from
he human feces.