Monday, June 22, 2020

Infection and epidemic of hand, foot and mouth disease

1. Source of infection

Humans are the only host of enteroviruses. Both patients and patients with recessive infections are the source of infection of the disease. During the epidemic, patients are the main source of infection. In the acute phase, the patient's stool detoxifies for 3-5 weeks and the throat detoxifies for 1-2 weeks. Healthy carriers and mild sporadic cases are the main sources of infection during epidemics and epidemics.

2. Route of transmission

(1) Mainly spread through feces-mouth;

(2) Spread of respiratory droplets;

(3) Infection by contacting the patient's skin and mucous membrane eczema fluid;

Viruses can be found in the throat and feces just a few days before the onset of the disease. At this time, the virus is infectious, usually within one week after the onset of infection. The patient expels the virus from the pharynx in 1-2 weeks of onset, and excretes the virus in feces in about 3-5 weeks. The herpes fluid contains a lot of virus, and the virus overflows when it breaks. Patient's feces, herpes fluid and respiratory secretions and their contaminated hands, towels, handkerchiefs, tooth cups, toys, tableware, milk utensils, bedding, underwear and medical appliances can cause the spread of the disease. Therefore, the disease is easy to spread, prone to epidemic, and difficult to prevent and control.

3. Susceptibility

The general population is generally susceptible to enteroviruses and can acquire immunity after infection. Due to the lack of cross-protection of antibodies after infection of different disease prototypes, the population can be infected with different types of enteroviruses and have repeated attacks. Most adults have acquired corresponding antibodies through recessive infection. Therefore, patients with enterovirus infection and hand-foot-mouth disease are mainly preschool children, especially children under 3 years old with the highest incidence. According to foreign literature reports, it can be popular among people every 2-3 years.

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