Tag: pathogen and their mode of transmission

Explanation: In humans it may take from as early as two weeks to as late as one year after exposure for symptoms to appear.

Explanation: Since The rabies virus is transmitted to others through the saliva of the infected animal, dont touch a dead animal; make sure your home is sealed to prevent wild animals from slipping into a basement, porch or attic; report any animals that are acting strangely to your local animal control department to prevent getting rabies.

Rabies is a viral disease that causes inflammation of the brain in humans and other mammals. Early symptoms can include fever and tingling at the site of exposure. These symptoms are followed by one or more of the following symptoms: violent movements, uncontrolled excitement, fear of water, an inability to move parts of the body, confusion, and loss of consciousness. Once symptoms appear, the result is nearly always death. The time period between contracting the disease and the start of symptoms is usually one to three months, but can vary from less than one week to more than one year. The time depends on the distance the virus must travel along peripheral nerves to reach the central nervous system.

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.