Gv

1. Parasitology & Virology
Dr. Bakhtyiar Sh. Azeez
B.V.M&S, MSc
Veterinary Department
11.2.2024

2. Parasitology
Parasitology is the science dealing with parasites that
infect animal and human, causing disease and misery in
most countries of the tropics.
Parasites are multicellular organisms that live on the
host, they depend on host for feeding.
There are two types of parasite Internal, External and
Protozoa parasite.

3. Types of parasites
• Obligatory parasite that is completely dependent on its host and
can’t survive without it e.g. hookworms.
• Facultative parasite that can change its life style between free-
living in the environment and parasitic according to the
surrounding conditions. e.g. Strongyloides stercoralis.
• Accidental parasite that affects an unusual host e.g. Toxocara
canis (a dog parasite) in man.
• Permanent parasite that lives in or on its host without
leaving it e.g. Lice, tick, fleas.

4. Types of Hosts
• Definitive host (DH) that harbours the adult or sexually mature
stages of the parasite (or in whom sexual reproduction occurs) .
• Intermediate host (IH) that harbours larval or sexually
immature stages of the parasite (or in whom asexual
reproduction occurs)
• Vector is an arthropod that transmits parasites from one host to
another, e.g. female sand fly transmits Leishmania parasites.

5. Types of (Helminthes) Worms
• Nematoda (Round worm) e.g. Ascraris
• Tramatoda (Flat worm) e.g. Fasciola
• Cestode (Tape worm) e.g. Echinococcus

6. Types of External Parasites
• Lice
• Tick
• Fleas
• Mite
• Mange

7. Protozoa
Are single celled organisms which either live free or parasitic.

8. Virology is the study of viruses and virus-like agents. Virology
is often considered a part of microbiology.
Virology

13. Bacterial growth & Antibiotics
Dr. Bakhtyiar Sh. Azeez
B.V.M&S, MSc
Veterinary Department
11.2.2024

14. Bacterial growth

15. Antibiotic Classification

20. A. Branches of Microbiology ?
B. Shapes of Bacteria ?
C. Write 2 Function of cell wall ?