Tag: infectious diseases - transmission and prevention

Among many epidemiologic triad or triangle, the traditional model for an infectious disease (The triad ) consists of an external agent, a susceptible host, and an environment. So, the correct option B ( Host, agent, and environment )

Neutrophils. The first immune cells that arrive at an injured site are mostly neutrophils, which are quick-response immune cells that recognize and destroy bacteria. 

Infectious diseases are those diseases which are caused by microorganisms like fungi, bacteria, virus, parasites. HIV (Human immunodeficiency virus) causes AIDS (Acquired immunodeficiency syndrome). It is a sexually transmitted disease. Diphtheria is caused by bacterium Corynebacterium diphtheria. It affects the mucous membrane of throat and upper respiratory tract. Coronary thrombosis is a disease that results due to accumulation of blood clot on the walls of arteries. Diabetes mellitus is a disease that results due to insufficient production of insulin in the body.

The limitations that are confronted while treating an infectious disease are that the impaired body functions happened due to the infection cannot recover completely, the patient is asked to have complete bed rest and infectious disease can spread from one person to another as it a contentious disease.

Pellagra or red sickness is a vitamin deficiency disease caused by chronic lack of Vitamin B3 in the diet. It can also be caused by the decreased intake of niacin or tryptophan. Described as three D's diarrhea, dermatitis, and dementia, this is indicated by symptoms such as dermatitis, alopecia or hair loss, edema or swelling, red skin lesions, weakness and mental confusion.

Mosquito-borne diseases or mosquito-borne illness are disease caused by bacterial, viruses or parasites transmitted by mosquitoes. They can transmit disease without being affected themselves. Mosquito vectored diseases include protozoan diseases, i.e., malaria, filarial diseases, and viruses such as dengue, encephalitis and yellow fever. 

• Measles, mumps, rubella, and varicella (commonly known as chickenpox), influenza are the chronic diseases of a virus. 
• These can be prevented from spreading by using vaccines. This vaccine works by prior exposure of a small dose of the virus or a protein from the virus, which activates the immune response.