- What stage of infection is most communicable?
- When stimulus frequency is increased but some relaxation still occurs this is called?
- Does the duration of the latent period change?
- What virus has the shortest incubation period?
- What are the 5 stages of infectious disease?
- What is period of incubation is it same for all diseases?
- Why does the latent period occur?
- What is happening during the latent period of muscle twitch?
- What disease has the longest incubation period?
- What is latent period of disease?
- What does it mean for an infection to be latent?
- How do incubation periods differ from latent periods?
- What causes a latent virus to become active?
- What is latent stage of virus?
- What happens during the incubation period ‘?
What stage of infection is most communicable?
In some cases, a person is contagious during the incubation period, while in others the person is not contagious until the illness begins.
The amount of time a child remains contagious depends on the infection and the child.
Young children are often contagious for longer than older children..
When stimulus frequency is increased but some relaxation still occurs this is called?
Complete tetanus, also called fused tetanus, occurs when the frequency of stimuli increases still further (refer to Figure 1d). In this case, individual muscle contractions completely fuse to produce one large muscle contraction.
Does the duration of the latent period change?
Predict Question 1: No, changes to the stimulus intensity will not change the duration of the latent period. The latent period is a chemical event initiated by the stimulus regardless of its intensity.
What virus has the shortest incubation period?
Incubation Period of Common DiseasesAdenovirus – 2 to 14 days, leading to a sore throat, fever, and pink eye.Vomiting after exposure to Bacillus cereus, a type of food poisoning – 30 minutes to 6 hours (very short incubation period)Clostridium tetani (Tetanus) – 3 to 21 days.Chickenpox – 10 to 21 days.More items…
What are the 5 stages of infectious disease?
The five periods of disease (sometimes referred to as stages or phases) include the incubation, prodromal, illness, decline, and convalescence periods (Figure 2).
What is period of incubation is it same for all diseases?
Remarkably, viral incubation periods can vary from 1 or 2 days to years (Table; click to magnify). Short incubation times usually indicate that actions at the primary site of infection produce the characteristic symptoms of the disease.
Why does the latent period occur?
When an action potential travels down the motor neuron, it will result in a contraction of all of the muscle fibers associated with that motor neuron. … 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 happening during the latent period of muscle twitch?
A twitch occurs when one muscle fiber contracts in response to a command (stimulus) by the nervous system. The time between the activation of a motor neuron until the muscle contraction occurs is called the lag phase (sometimes called the latent phase).
What disease has the longest incubation period?
Examples for diseases in humansDiseasebetweenperiodEbola1daysErythema infectiosum (Fifth disease)13daysGiardia3daysHIV2weeks to months, or longer28 more rows
What is latent period of disease?
The latent period is defined as the period of time between the occurrence of infection and the onset of infectiousness (when the infected individual becomes infectious). Individuals in this stage of the disease are said to be infected but not infectious.
What does it mean for an infection to be latent?
Latent infection, generally speaking, means the residence in the body of a specific infectious agent without any manifest symptoms. The symptomless incubation period, which in certain diseases, notably measles and smallpox, is fairly definite in length, is a period of latency in infection.
How do incubation periods differ from latent periods?
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 causes a latent virus to become active?
The genome of a virus that causes latent infection of cells must be transcribed and translated into viral proteins. This occurs when the virus is reactivated from a latent stage to a lytic stage. Certain viral genes that are specific to each virus initiate this reactivation process.
What is latent stage of virus?
A latent viral infection is a type of persistent viral infection which is distinguished from a chronic viral infection. Latency is the phase in certain viruses’ life cycles in which, after initial infection, proliferation of virus particles ceases. However, the viral genome is not eradicated.
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.