- What virus has the shortest incubation period?
- Does the duration of the latent period change?
- Which period is called the latency period?
- Do all viruses have an incubation period?
- How long are viruses contagious for?
- What is the incubation period for most viruses?
- What are the stages of disease progression?
- Why relaxation period is longer than contraction period?
- What is the difference between latency period and incubation period?
- What is latent period in action potential?
- What happens if the latent period for an infection is longer than the incubation period?
- What is a long latency period?
- What happens during the latency stage?
- What is latent period?
- What happens during the latency period?
- Why is latent period important?
- What is happening during the latent or lag phase?
- What is the most common way for a virus to kill a cell?
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….
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.
Which period is called the latency period?
In epidemiology, particularly in the discussion of infectious disease dynamics (modeling), the latent period (also known as the latency period or the pre-infectious period) is the time interval between when an individual or host is infected by a pathogen and when he or she becomes infectious, i.e. capable of …
Do all viruses have an incubation period?
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.
How long are viruses contagious for?
Most people will be infectious for around 2 weeks. Symptoms are usually worse during the first 2 to 3 days, and this is when you’re most likely to spread the virus.
What is the incubation period for most viruses?
The incubation period of a cold is typically between one and three days. There are several factors that can affect the length of the incubation period, including: the amount of virus you were exposed to, called the infectious dose.
What are the stages of disease progression?
The five periods of disease (sometimes referred to as stages or phases) include the incubation, prodromal, illness, decline, and convalescence periods (Figure 2).
Why relaxation period is longer than contraction period?
Following the latent period is the contraction phase in which the shortening of the sarcomeres and cells occurs. Then comes the relaxation phase, a longer period because it is passive, the result of recoil due to the series elastic elements of the muscle.
What is the difference between latency period and incubation period?
Depending on the disease, the person may or may not be contagious during the incubation period. During latency, an infection is subclinical. With respect to viral infections, in incubation the virus is replicating. This is in contrast to viral latency, a form of dormancy in which the virus does not replicate.
What is latent period in action potential?
The contraction generated by a single action potential is called a muscle twitch. … 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 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 is a long latency period?
Latency period is the time between exposure to something that can cause disease, like asbestos, and presentation of symptoms in patients. For mesothelioma specifically, there is a long latency period, which is directly related to the poor prognosis that is typical of the disease.
What happens during the latency stage?
Latency Stage (6 years to puberty) During this stage the libido is dormant and no further psychosexual development takes place (latent means hidden). Freud thought that most sexual impulses are repressed during the latent stage, and sexual energy can be sublimated towards school work, hobbies, and friendships.
What is latent period?
Latent period (epidemiology), the time interval between when an individual is infected by a pathogen and when he or she becomes capable of infecting other susceptible individuals.
What happens during the latency period?
Definition: Latency Period. LATENCY PERIOD: The period of reduced sexuality that Freud believed occured between approximately age seven and adolescence. Freud claimed that children went through a “latency period” during which “we can observe a halt and retrogression in sexual development” (Introductory Lectures 16.326) …
Why is latent period important?
A latent period allows study of alterations of anatomy and physiology before, during, and after onset of epileptogenesis and the model, therefore, may be ideal for experiments focused on underlying cellular mechanisms and antiepileptogenic strategies.
What is happening during the latent or lag phase?
The time between the activation of a motor neuron until the muscle contraction occurs is called the lag phase (sometimes called the latent phase). During the lag phase a signal called an action potential moves to the end of the motor neuron (axon terminal).
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.