Question

Name the causative agent and main symptoms of the following diseases.
A. Filariasis
B. Rabies
C. Chickenpox

Answer 1

Hint: All of the given diseases are caused by the agents which cannot reach their host on their own so they require an intermediate host for the delivery of causative organisms which are mostly microbes.

Complete answer:
First of all the case given to us is of filariasis which is caused by a nematode known as the Wuchereria bancrofti. This nematode cannot directly affect humans and for infection, it requires an intermediate host which in this case is the Anopheles mosquito. The nematode is living in the blood capillaries of the mosquito and it gets transferred to the humans and thus causing problems. Though there are no symptoms of filariasis after the person is affected the inflammation starts to occur in the skin and various other body parts. Sometimes the limbs also get swollen up and the condition is called elephantiasis.
The other case is of rabies and we all clearly know that rabies generally and mostly spread by the bite of dogs. But not all dogs cause rabies so we can say that a dog is not the causative agent rather it is just a host for the main pathogen. The known pathogen for rabies is a virus. This virus has a variety of hosts like dogs, skunks, bats, and the transfer mechanism is by the saliva of infected animals. When they bite the saliva gets transferred through the wound. The main symptoms include fever, sometimes headache, muscle spasms, excess salivation, and also in some cases it has been observed that the infected person has attained mental confusion.
The last case we have is of chickenpox which we all have encountered at least once in our lifetime and after the first time our body develops immunity against the virus which is the causative agent and the mechanism of transfer of the virus is by coming in contact with the infected person. The fevers are not so lethal as the body develops rashes and spots throughout the entire body.

First of all the case given to us is of filariasis which is caused by a nematode known as the Wuchereria bancrofti. This nematode cannot directly affect humans and for infection, it requires an intermediate host which in this case is the Anopheles mosquito. The nematode is living in the blood capillaries of the mosquito and it gets transferred to the humans and thus causing problems. Though there are no symptoms of filariasis after the person is affected the inflammation starts to occur in the skin and various other body parts. Sometimes the limbs also get swollen up and the condition is called elephantiasis.
The other case is of rabies and we all clearly know that rabies generally and mostly spread by the bite of dogs. But not all dogs cause rabies so we can say that a dog is not the causative agent rather it is just a host for the main pathogen. The known pathogen for rabies is a virus. This virus has a variety of hosts like dogs, skunks, bats, and the transfer mechanism is by the saliva of infected animals. When they bite the saliva gets transferred through the wound. The main symptoms include fever, sometimes headache, muscle spasms, excess salivation, and also in some cases it has been observed that the infected person has attained mental confusion.
The last case we have is of chickenpox which we all have encountered at least once in our lifetime and after the first time our body develops immunity against the virus which is the causative agent and the mechanism of transfer of the virus is by coming in contact with the infected person. The fevers are not so lethal as the body develops rashes and spots throughout the entire body.

Note:
The most common way of getting cured of a disease is by administering the pre-formed antibodies specific to the disease. Also, the viral diseases get over on their own after a certain time period.