PAR: Types of Parasite Host

This unit bases on type of parasite hosts

Types of hosts

A host is the non-parasitic member in a parasitic association. It habours the parasites and thus provides itself as the environment of the parasite, albeit involuntarily. Biotic and abiotic factors of the host influence the survival, distribution, prevalence, intensity, etc. of the parasite. Abiotic factors in the host include:

There are different types of hosts, depending on a number of criteria. They include:

Definitive or Primary host

primary host

Intermediate or secondary host

secondary host

Reservoir host

Paratenic/transport/carrier host

Ecological host

ecological host


Dead end host

 Host-parasite Interactions/Relationships

Generally, parasites may locate their host directly or indirectly and then establish a relationship that is determined by ecological, physiological, geographical and evolutionary factors. The selective and dynamic phenomenon of parasite adaptation to certain hosts is known as host specificity.

Specificity results from a number of convergent phenomena, starting with habitats, microhabitat and feeding styles of the free-living progenators. This influences the types of interaction parasites have with the host and through this specificity results.


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