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प्रश्न
Why do you think it is not possible to produce vaccine against 'common cold'?
उत्तर
Vaccines target specific pathogens and elicit immunity. In case of common cold, more than 200 strains of viruses are responsible for causing the disease. Hence it is practically difficult to develop vaccine against it.
संबंधित प्रश्न
Study a part of the life cycle of malarial parasite given below. Answer the questions that follow:
(a) Mention the roles of ‘A’ in the life cycle of the malarial parasite.
(b) Name the event ‘C’ and the organ where this event occurs.
(c) Identify the organ ‘B’ and name the cells being released from it.
How does the transmission of the following disease take place?
Amoebiasis
Show with the help of a flow chart only, the life cycle of malarial parasite in humans.
Mention any four methods involved in the treatment of cancer.
Answer the following question.
Name a human disease, its causal organism, symptoms (any three) and vector, spread by intake of water and food contaminated by human faecal matter.
The sporozoite of the malarial parasite is present in _______.
Match the pathogens with respective diseases caused by them and select the correct match using the codes given below.
| Column I | Column II |
| I. Leishmania donavani | 1. Malaria |
| II. Wuchereria bancrofti | 2. Amoebiasis |
| III. Trypanosoma gambiense | 3. Kala - azar |
| IV. Entamoeba histolytica | 4. Sleeping sickness |
| 5. Filariasis |
| Diseases | Causative agent | Symptoms |
| Ascariasis | Ascaris | |
| Trichophyton | Appearance of dry, scaly lesions on various parts of the body | |
| Typhoid | High fever, weakness, headache, stomach pain and constipation. | |
| Pneumonia |
What is Kala-azar?
Leishmaniasis is a disease caused by a protozoan parasite transmitted by biting of ______.
Flemming's used ______ bacterium culture during the discovery of penicillin.
Which of the following disease is caused by a protozoan?
Pneumonia is caused by ______.
The clinical test that is used for diagnosis of typhoid is ______.
Why is it that during changing weather, one is advised to avoid closed, crowded and airconditioned places like cinema halls etc.?
The harmful allele of sickle cell anemia has not been eliminated from human population. Such afflicted people derive some other benefit. Discuss.
What is Pulse Polio Programme of Government of India? What is OPV? Why is it that India is yet to eradicate Polio?
Write the scientific name of the causative agent of the following diseases:
Typhoid
Write the mode of transmission for the following diseases:
Typhoid
