An introduction of parasitology for undergraduates students

2. * The association between two
organisms may be one of the following:
Mutualism:
Mutual benefits is derived
from the association.
Symbiosis:
Mutual benefit, and the
two organisms cann’t live
independently.

3. * The association between two
organisms may be one of the following:
Commensalism:
One partner benefits
(commensal) while the other
(host) is unaffected. It may be
called a non-pathogenic parasite.
Parasitism:
One organism (parasite) lives
at the expense of the other
(host) which usually suffers
from the association.

4. Parasitology course:-
Lecture 1
Definition.
Types of hosts.
Basic Classification of Parasites of
Medical Importance.

5. Parasitology course:-
 Def.:
The science that deals with organisms that live on or
within other organisms (Hosts).

6. Parasitology course:-
Lecture 1
Definition.
Types of hosts.
Basic Classification of Parasites of
Medical Importance.

7. Types of hosts:
Final host or
Definitive host:
Harbours the adult or
sexually mature
parasite.
Intermediate host:
Harbours the
immature or asexual
stages of the parasite.
Reservoir host:
Animals that harbour the
same species of parasites as
man and constitute a source
of infection to him.
Vector:
An arthropod that carries a
parasite to its host.

8. Parasitology course:-
Lecture 1
Definition.
Types of hosts.
Basic Classification of Parasites of
Medical Importance.

9. Basic Classification of Parasites of
Medical Importance:
HELMINTHES
Flat worms Cylindrical worms
TREMATODES NEMATODESCESTODES
Liver flukes:
Fasciola hepatica
Fasiola gigantica
Intestinal flukes:
Hetrophyes hetrophyes
Blood flukes:
Shistosoma haematobiom
Shistosoma mansoni
Taenia saginata
Taenia solieum
H. nana – H. Diminuta
H. cyst – Ecinococcus
Ascaris
E. Vermicularis
Trichuris trichura
Anchlystoma

10. Basic Classification of Parasites
of Medical Importance:
PROTOZOA ARTHOPODES
Amoeba
Trypansoma
Leshmania
Toxoplasma
Fleas
lice
scapies

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