Disease Causative Agents

Hepatitis is an inflammatory condition of the liver, typically caused by viral infections. Kalaazar affects the spleen and bone marrow, while SARS and amoebiasis target the lungs and intestines respectively.

Common cold viruses are highly contagious and can be transmitted through respiratory droplets in the air, contaminated surfaces, or direct contact with infected individuals.

Rabies is a zoonotic disease transmitted primarily through the saliva of infected animals, most commonly via a bite. It is not spread through casual physical contact or sexual activity.

SARS (Severe Acute Respiratory Syndrome) is caused by a coronavirus, which is a type of virus. It is not caused by bacteria, fungi, or protozoa.

Tuberculosis is primarily a respiratory disease caused by Mycobacterium tuberculosis, which typically infects the lungs after being inhaled.

Hepatitis A is primarily transmitted through the fecal-oral route, often via contaminated water or food. It is not typically spread by air or physical contact.

Diarrhoea is a condition defined by frequent loose or liquid bowel movements, which often leads to significant fluid loss and dehydration. It is a common symptom of various gastrointestinal infections.

Hepatitis is an inflammatory condition of the liver, and it is commonly caused by viral infections (Hepatitis A, B, C, etc.). Jaundice is a clinical sign of hepatitis, as the liver fails to process bilirubin properly.

Brain fever, or encephalitis, is most commonly caused by viral infections, such as Japanese encephalitis or herpes simplex virus. While bacteria can cause meningitis, the term brain fever is frequently associated with viral causes in general contexts.

AIDS (Acquired Immunodeficiency Syndrome) is a well-known sexually transmitted disease caused by the HIV virus.

Malaria is caused by a protozoan parasite (Plasmodium), not by bacteria.

Infectious diseases are those caused by pathogens such as bacteria, viruses, fungi, or parasites that can spread from one host to another.

Compared to bacteria and viruses, which multiply very rapidly, worms (multicellular parasites) have a much slower reproductive and growth cycle.

Vectors are organisms, such as mosquitoes or ticks, that transmit pathogens from an infected host to a new host.

Tuberculosis is caused by the bacterium Mycobacterium tuberculosis, not by a virus.