The infectious form of the Plasmodium is
The sporozoites are the infectious stages of the pathogen. Gametocytes are the sexual stages while trophozoite is the feeding stage of the pathogen.
Tuberculosis causing bacteria are entered into the human body through ____.
TB is an air-borne disease and their microbes enter into the lungs through nose of humans.
In the human host, the sporozoites first reproduce asexually in the
The sporozoites first reach the liver through the blood and reproduce asexually in the liver tissues. From here they are then released into the RBC of man.
Sexually transmitted diseases are spread by casual physical contact.
Sexually transmitted diseases are mostly spread by sexual contact, blood transfusion and drug abuses.
To complete its lifecycle, the malarial parasite requires
For completing its lifecycle the malaria parasite requires two hosts-man and female Anopheles mosquito and the primary host - female Anopheles mosquito is also called vector. The mosquito thus acts as both the host and the vector.
Why did milkmaids who had cowpox do not suffer from smallpox later?
Since small pox virus is closely related to cowpox virus, the milkmaids who had cowpox became resistant to the smallpox virus.
What enters the mosquito when it bites an infected person?
The female mosquito takes up gametocytes when it bites an infected person.
The gametocytes are developed in the
The gametocytes are produced in the RBC of man. Liver of man is associated with the process of asexual reproduction. Salivary glands of the mosquito help in the storage of the sporozoites while the process of fertilization takes place in the intestine of the mosquito.
Filarial disease is mainly spread by ____ mosquitoes.
Filariasis is transmitted by the bites of female Culex species of mosquito.
Which one of the following causes malignant malaria?
Plasmodium falcipuram causes a malignant form of malaria which is often fatal.
Which of the following inhibits protein synthesis in bacteria?
Tetracycline interferes with bacterial ribosomes and inhibits protein synthesis.
The first antibiotic was isolated from ____.
The first antibiotic, penicillin was isolated from the fungus is Penicillium notatum.
____ is an example of air-borne disease.
Pneumonia is an air-borne disease that spreads through the droplets by an infected person who sneezes or coughs.
Which of the following is not a symptom, if a pathogen attacks brain?
Jaundice is caused due to malfunction of liver, but not because of brain.
In the mosquito, the sporozoites are stored in the
The sporozoites are stored in the salivary glands of the mosquito.
Which of the following is false about a person who has suffered from smallpox and recovered?
Even in case of an epidemic, he will not suffer from small pox since he has now become resistant to further attacks of smallpox.
Which of the following is an example of killed vaccine?
In the vaccines for whooping cough, the bacteria Bordotella pertusis is killed by heat or chemicals.
Which type of immunity provides protection to a new born baby?
A new born baby gets antibodies from mother through breast milk. So, it is a type of natural passive immunity.
An antigen is isolated from the micro-organism for a ____.
In case of influenza vaccine, the important antigen is isolated from the micro-organism.
Potential vector for malaria are ____.
Malaria is caused by a parasite called Plasmodium, which is transmitted by the infected mosquito bite.
Shivering in malaria is caused due to
The symptoms of malaria are shown because of release of a toxin haemozoin. This is released when the RBC's rupture.
It is difficult to make anti-viral medicines, because ____.
Viral cells have few bio-chemical mechanisms of their own. They enter into our body cells and use our cellular machinery for their life processes.
____ is a soil born disease.
Tetanus is an infectious disease caused by contamination of wounds from bacteria. The bacteria "Clostridium tetani" is the cause of tetanus which lives in the soil in the form of spores.
Sporogony takes place in
Sporogony takes place in the intestine of the mosquito. The sporozoites thus formed migrate to the salivary glands of the mosquito.
A person bitten by a poisonous snake is given an Anti venom injection, which causes ____.
In artificial passive immunity, the person’s body is receiving the antibodies without any antibody production in his body. Antivenom consists of antibodies developed against snake bite in other animals like horse.
The childhood immunization programmes are important, because ____.
Childhood immunization programmes are important to prevent infection later on in life.
The type of immunity that carries out a person from cold is____.
The person’s body is actively fighting against the infection naturally without any artificial help. Hence it is a type of natural active immunity.
The type of leucocytes is mainly involved in cell and antibody mediated immunity are ____.
T and B-lymphocytes of leucocytes are mainly involved in bringing about cell and antibody mediated immunity.
DDT is no longer used in the chemical control of mosquitoes, because it ____.
DDT persists in the environment for a long time and causes toxicity by accumulation in the body of fishes, birds and humans through food chains.
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