PAR: The concept of Parasitism

This unit is rallied on the concept of parasites and their different genetic formation

Parasitism


This is a physiological association in which one organism (the parasite) benefits while the host looses. It is one-sided and it is a social and ecological relationship between two different organisms, one being injured in the association.

Parasitology therefore is defined as an aspect of symbiology which deals with the study of parasites. It is a medical and ecological science that encompasses the study of parasite and parasitic diseases.

A parasite is defined as an organism which has a detrimental effect on the intrinsic growth rate of its host population

Parasitism is also defined as an association, generally continuous, between two different organisms, one of which lives at the expense of the other.

Types of parasites

Parasites may be plants, animals, bacteria or viruses and they occur in every phylyum in the Kingdom animalia, ranging from protozoans to chordates. They are categorized based on different criteria.

Site of residence or habitat:

Ectoparasites

tick

Endoparasites

worm

Duration or degree of dependence

Temporary parasites

temporary parasite

Permanent parasites

Goby and parasite(s?) on sea pen

Nature of host

Hyper-parasites (parasites of parasites)

hyperparasite

Cleptoparasites ( organisms that steal food reserves of its host to feed its young)

Other types of parasites includes

Wandering /Errant/Aberrant parasites

Occasional/Accidental parasites

accidental parasites

Obligatory/Obligate parasites

Facultative parasites

Microparasites

microparasites

Macroparasites

macroparasite

Pseudoparasites

Coprozoic or spurious parasite

 

 

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