Protozoa by Vijay sir

                          

              Protozoa are the lowest from of animal life. These are non-photosynthetic , unicellular organisms with protoplasm clearly differentiated into nucleus and cytoplasm.

GENERAL PROPERTIES OF PROTOZOA

1.        They are much larger than bacteria.
2.        Their surface membrane vary in complexity and rigid.
3.      Many protozoa are parasitic.
4.      They do not pass through filters.

Parasite

               A parasite is an organism which lives in and derives its nourishment from the body of animal host. The parasites include protozoa and helminthes.

Endoparasite : -

                          When a parasite lives in its host and causes an infection, it is known as endoparasites, e.g, tapeworm, malaria parasite .

Ectoparasite :-

                       When a parasite lives on its host & causes an infestation, it is known as ectoparasite,e.g. Body  Louse.

MEDICAL PARASITOLOGY  

Medical parasitology is the study of parasites which cause disease in man.

Mechanisms of Disease Production by parasites 

The effect of parasites on their host

1.    .   Mechanical injury 
2.       .   Deleterious action of toxic substances.
3.     . Introduction of pathogenic micro – organisms.

Reaction of the host to parasite

1.     .  Tissue reactions.
2.     .  Immunological esponse.

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V                                             Vijay Singh