Parasitology and Virology Notes
Subject Overview
Parasitology and Virology covers the general characteristics, life cycle and laboratory diagnosis of medically important protozoa and helminths — Giardia, Entamoeba, roundworms, hookworms, tapeworms and the malarial parasite — along with concentration techniques for ova, then introduces medical virology: viral classification, sample collection and processing (egg inoculation, tissue culture) and viral staining technique. A 4-credit elective theory paper.
Subject at a glance
2
Units
14
Topics
4
Credits
2
Infographics
Unit-wise Syllabus
2 units — open any unit for detailed topic-wise notes, diagrams and important exam questions
- Introduction and general characteristics of protozoa and helminths
- collection/transport/processing/preservation of samples
- morphology/life cycle/diagnosis of Giardia and Entamoeba
- roundworms and hookworms
- Taenia solium and T. saginata
- malarial parasite (P. vivax and P. falciparum)
- laboratory diagnosis of hydatid cyst and cysticercosis
- concentration techniques for ova
- 1. Mosquito bite: Sporozoites enter blood
- 2. Liver stage: Multiply in liver cells
- 3. Blood stage: Merozoites infect red cells
- 4. Gametocytes form: Taken up by a mosquito
- 5. Mosquito stage: Sexual cycle, new sporozoites
Study guide
This unit covers protozoa and helminths: general characteristics, sample collection and processing, morphology, life cycle and diagnosis of Giardia, Entamoeba, roundworms, hookworms, Taenia species, malaria parasites and laboratory diagnosis of hydatid cyst and cysticercosis, with concentration techniques for ova. Learn each parasite's life cycle with a diagram.
- Introduction to medical virology
- classification of viruses
- medically important viruses
- collection/transportation/storage of samples for viral diagnosis
- staining techniques used in virology
- sample processing for viral diagnosis (egg inoculation and tissue culture)
- 1Collect early in illness
Swab, blood, CSF
- 2Viral transport medium
Keep cold
- 3Process quickly
- 4Detect
Culture (eggs, cell lines), antigen, PCR, serology
- 5Report
Study guide
You study medical virology: classification, medically important viruses, sample collection, transport and storage, staining techniques and sample processing, including egg inoculation and tissue culture. Understand why viruses need living cells to grow.
Why Parasitology and Virology Matters
Parasitic and viral diseases such as malaria, dengue and hepatitis are a major part of the disease burden in India and across Africa, so diagnostic skills here are highly relevant.
How to Prepare for Parasitology and Virology
- Draw the life cycles of malaria, Entamoeba and the major worms.
- Learn to identify ova and parasites from pictures.
- Practise blood smear preparation for malaria.
Parasitology and Virology: Frequently Asked Questions
How is malaria diagnosed in the laboratory?
By examining thick and thin stained blood smears under the microscope for malaria parasites, often alongside rapid antigen tests.
Why do we use concentration techniques for stool?
They increase the number of ova or cysts in a sample so that light infections are not missed.