Disease Causative Agents

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.

Chronic diseases are long-term conditions that persist for a long time and often result in ongoing poor health.

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

AIDS is transmitted through direct contact with infected bodily fluids, such as blood or sexual contact, not through the air. Common cold, pneumonia, and tuberculosis are all respiratory infections that spread via airborne droplets.

Chronic diseases are long-term conditions that persist for a long time, often for years or a lifetime. Elephantiasis is a chronic condition, whereas fever and cough are typically acute symptoms of short-term illnesses.

Infectious diseases are caused by pathogens, which are biological agents like bacteria, viruses, fungi, or parasites. These are collectively referred to as microbes.

Hemophilia is a genetic disorder, meaning it is inherited and not caused by an infectious pathogen. Cholera, typhoid, and malaria are all infectious diseases caused by bacteria or parasites.

Influenza is an acute viral infection that typically resolves within a week or two. Elephantiasis, ascariasis, and tuberculosis are chronic or long-term infections.

Syphilis is a well-known sexually transmitted infection (STI) caused by the bacterium Treponema pallidum. Tetanus, diphtheria, and constipation are not sexually transmitted.

Tuberculosis is a chronic disease that requires long-term treatment. Headache, diarrhea, and common cold are acute conditions that appear suddenly and last for a short duration.