Question: What Are The Four Stages Of Infection?

What is the world’s leading infectious killer?

Even though tuberculosis (TB) is preventable and curable, it is the top infectious killer worldwide, claiming around 4400 lives a day.

TB also remains the leading cause of death among people living with HIV, causing one in three AIDS-related deaths..

What is the most common viral infection in the world?

Hepatitis B: Approximately 2 billion people are infected with the hepatitis B virus (HBV), making it the most common infectious disease in the world today.

Where do most deaths from infectious disease occur?

Most U.S. deaths from infectious disease occur in the poorest counties. These include areas in Louisiana, Mississippi, Alabama, Georgia, West Virginia and clusters in Alaska and the Southwest, Mokdad said.

What are the 5 stages of illness behavior?

Another sociologist, Edward A. Suchman, formulated illness behavior as con- sisting of five stages: symptom experience, assumption of the sick role, medical care contact, dependent patient, and recovery or rehabilitation (Table 1-1).

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 are the four stages of natural history of disease?

Events that occur in the natural history of a communicable disease are grouped into four stages: exposure, infection, infectious disease, and outcome (see Figure 1.6). We will briefly discuss each of them in turn.

What are 5 common types of infectious diseases?

Common Infectious DiseasesChickenpox.Common cold.Diphtheria.E. coli.Giardiasis.HIV/AIDS.Infectious mononucleosis.Influenza (flu)More items…

What is the leading infectious disease?

Tuberculosis is now the leading infectious disease threat in the world, killing more people than HIV/AIDS, as reported today by the World Health Organization.

Which stage of infection is most severe?

Following the prodromal period is the period of illness, during which the signs and symptoms of disease are most obvious and severe. The period of illness is followed by the period of decline, during which the number of pathogen particles begins to decrease, and the signs and symptoms of illness begin to decline.

How do infections work?

Infection occurs when viruses, bacteria, or other microbes enter your body and begin to multiply. Disease, which typically happens in a small proportion of infected people, occurs when the cells in your body are damaged as a result of infection, and signs and symptoms of an illness appear.

What are the four stages of disease development?

10.3B: Disease DevelopmentStages of Disease.STAGE 1: INCUBATION PERIOD.STAGE 2: PRODROMAL PERIOD.STAGE 3: ACUTE PERIOD.STAGE 4: CONVALESCENCE PERIOD.