Question: During Which Periods Can A Disease Be Transmitted?

What is the contagious period called?

Communicability: Period of communicability is the time during which an infectious agent may be transferred directly or indirectly from an infected person to another person, from an infected animal to humans, or from an infected person to animals.

Also known as the ‘infectious period’..

What is incubation period of a disease?

What is an incubation period? The incubation period is the time between being exposed to a disease and when the symptoms start.

What are the 5 stages of disease?

The five periods of disease (sometimes referred to as stages or phases) include the incubation, prodromal, illness, decline, and convalescence periods (Figure 2). The incubation period occurs in an acute disease after the initial entry of the pathogen into the host (patient).

What happens if the latent period for an infection is longer than the incubation period?

If the latent period is longer than the incubation period, then people are infectious only after symptoms start. This means they can be recognised as being ill before they are infectious.

What are the five signs of an infection?

Know the Signs and Symptoms of InfectionFever (this is sometimes the only sign of an infection).Chills and sweats.Change in cough or a new cough.Sore throat or new mouth sore.Shortness of breath.Nasal congestion.Stiff neck.Burning or pain with urination.More items…

What are the top 3 communicable diseases?


What happens during the incubation period ‘?

Incubation period: In medicine, the time from the moment of exposure to an infectious agent until signs and symptoms of the disease appear. For example, the incubation period of chickenpox is 14-16 days. In biology, the incubation period is the time needed for any particular process of development to take place.

Are viruses contagious before symptoms?

You’re contagious before you have symptoms — during the incubation period, when the virus enters your system. And just because you feel better doesn’t mean those around you are safe. In fact, you’re still contagious after symptoms subside, carrying a bacterial or viral infection that can spread to others.

What happens during an infection?

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 disease has the shortest incubation period?

Examples for diseases in humansDiseasebetweenperiodEbola1daysErythema infectiosum (Fifth disease)13daysGiardia3daysHIV2weeks to months, or longer28 more rows

What is the illness stage?

During the illness stage, symptoms characteristic of a particular disease are recognized. It is also at this stage that the infectious disease is highly communicable. When the patient overcomes the disease, the ensuing stage is the convalescent period. Also called: illness stage.

What are the 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.

How do viruses make you feel ill?

Viruses make us sick by killing cells or disrupting cell function. Our bodies often respond with fever (heat inactivates many viruses), with the secretion of a chemical called interferon (which blocks viruses from reproducing), or by marshaling the immune system’s antibodies and other cells to target the invader.

What is the difference between latency period and incubation period?

This stage of subclinical disease, extending from the time of exposure to onset of disease symptoms, is usually called the incubation period for infectious diseases, and the latency period for chronic diseases. During this stage, disease is said to be asymptomatic (no symptoms) or inapparent.

Which type of disease Cannot be spread from one person to another?

A noncommunicable disease is a noninfectious health condition that cannot be spread from person to person. It also lasts for a long period of time. This is also known as a chronic disease.

How are viruses transmitted from person to person?

Viruses spread from person to person mainly in droplets that fly out when you cough or sneeze. These tiny drops from a sick person move through the air and land on the mouths or noses of others nearby.

What happens during the latent phase of a disease?

The period between exposure and infection is called ‘latent period’, since the pathogen is present in a ‘latent’ stage, without clinical symptoms or signes of infection in the host. The period between exposure and onset of clinical symptoms is called ‘incubation period’.

What is the most common way for a virus to kill a cell?

Most viral infections eventually result in the death of the host cell. The causes of death include cell lysis, alterations to the cell’s surface membrane and various modes of programmed cell death.

What’s the difference between a disease and a virus?

As you might think, bacterial infections are caused by bacteria, and viral infections are caused by viruses. Perhaps the most important distinction between bacteria and viruses is that antibiotic drugs usually kill bacteria, but they aren’t effective against viruses.

How can the chain of infection be broken?

Break the chain by cleaning your hands frequently, staying up to date on your vaccines (including the flu shot), covering coughs and sneezes and staying home when sick, following the rules for standard and contact isolation, using personal protective equipment the right way, cleaning and disinfecting the environment, …

What are the 4 stages of communicable illness?

The natural history of an untreated communicable disease has four stages: stage of exposure, stage of infection, stage of infectious disease, and stage of outcome.

What is infectious period?

In epidemiology, particularly in the discussion of infectious disease dynamics (mathematical modeling of disease spread), the infectious period is the time interval during which a host (individual or patient) is infectious, i.e. capable of directly or indirectly transmitting pathogenic infectious agents or pathogens to …

What is difference between infectious and contagious?

Some — but not all — infectious diseases spread directly from one person to another. Infectious diseases that spread from person to person are said to be contagious. Some infections spread to people from an animal or insect, but are not contagious from another human.

How long is a bacterial infection contagious?

When a person is “infectious”, it means they’re able to pass their infection on to others. You’re usually no longer infectious 24 hours after starting a course of antibiotics, but this time period can sometimes vary.

Why do viruses have incubation periods?

The infection of multiple cells in the body and subsequent replication of the virus takes time. While the virus remains at low levels, it can neither be detected nor transmitted. This is why this time is known as the virus’ incubation period.

Why is there a latent period for muscle contraction?

The latent period, or lag phase, the contraction phase, and the relaxation phase. The latent period is a short delay (1-2 msec) from the time when the action potential reaches the muscle until tension can be observed in the muscle.

What is disease process?

Diseases are generally understood to be medical conditions that involve a pathological process associated with a specific set of symptoms. Localized diseases affect specific parts of the body; disseminated diseases spread to other parts of the body; and systemic diseases affect the entire body.