Quick Answer: How Are Infectious Diseases Classified?

What is a Class B infectious disease?

• Yersiniosis.

Class B: Disease of public health concern needing timely response because of potential for epidemic spread – report by the end of the next business day after the existence of a case, a suspected case, or a positive laboratory result is known..

Which infectious disease agent is the smallest?

The smallest known infectious agents, prions are composed of a single protein and viroids are a simple circle of ribonucleic acid (RNA). Prions infect brain tissue and cause normal proteins to change shape leading to cell death.

What are the 2 Classification of Disease?

The most widely used classifications of disease are (1) topographic, by bodily region or system, (2) anatomic, by organ or tissue, (3) physiological, by function or effect, (4) pathological, by the nature of the disease process, (5) etiologic (causal), (6) juristic, by speed of advent of death, (7) epidemiological, and …

What are the 7 pathogens?

Infectious diseases are caused by pathogens, which include bacteria, fungi, protozoa, worms, viruses, and even infectious proteins called prions.

What are the 10 most common diseases?

Heart disease. Share on Pinterest Many of the top 10 causes of death are preventable through lifestyle changes and regular checkups. … Cancer. Deaths in 2017: 599,108. … Unintentional injuries. … Chronic lower respiratory disease. … Stroke and cerebrovascular diseases. … Alzheimer’s disease. … Diabetes. … Influenza and pneumonia.More items…•

What is an infectious disease doctor called?

What is an infectious disease (ID) specialist? An infectious disease (ID) specialist is (see below, “Subspecialty/Fellowship Training”*) an expert in the diagnosis and treatment of diseases caused by microorganisms, including bacteria, viruses (such as HIV and hepatitis), fungi and parasites.

What is infectious disease?

Infectious diseases are disorders caused by organisms — such as bacteria, viruses, fungi or parasites. Many organisms live in and on our bodies. They’re normally harmless or even helpful. But under certain conditions, some organisms may cause disease. Some infectious diseases can be passed from person to person.

What are the classification of infection?

Treatment will depend on the cause of the infection. This article will focus on the most common and deadly types of infection: bacterial, viral, fungal, and prion.

What are the 5 major types of infectious agents?

There are five major types of infectious agents: bacteria, viruses, fungi, protozoa, and helminths. In addition, a new class of infectious agents, the prions, has recently been recognized.

What are the 5 most common infectious diseases?

The 5 Most Common Infectious DiseasesHepatitis B. According to current statistics, hepatitis B is the most common infectious disease in the world, affecting some 2 billion people — that’s more than one-quarter of the world’s population. … Malaria. … Hepatitis C. … Dengue. … Tuberculosis.

What are the categories of disease?

There are four main types of disease: infectious diseases, deficiency diseases, hereditary diseases (including both genetic diseases and non-genetic hereditary diseases), and physiological diseases. Diseases can also be classified in other ways, such as communicable versus non-communicable diseases.

What are infectious agents classified by?

The agents that cause disease fall into five groups: viruses, bacteria, fungi, protozoa, and helminths (worms). Protozoa and worms are usually grouped together as parasites, and are the subject of the discipline of parasitology, whereas viruses, bacteria, and fungi are the subject of microbiology.

What are the 4 types of infectious diseases?

There are different types of pathogens, but we’re going to focus on the four most common types: viruses, bacteria, fungi, and parasites.

What is the largest infectious agent?

bacteriaThe most numerous pathogens are bacteria, as you will discover. In fact, there are more than twice as many different types of bacteria that cause human disease compared to the number of infection causing viruses.

What are the 3 ways infectious diseases are spread?

Infectious diseases can spread in a variety of ways: through the air, from direct or indirect contact with another person, soiled objects, skin or mucous membrane, saliva, urine, blood and body secretions, through sexual contact, and through contaminated food and water.