The main route of transmission of polio

Polio is mainly transmitted through fecal-oral transmission, with the virus being excreted through the patient's nasopharynx at the beginning of infection, and then excreted in the feces as the disease progresses. In general, the virus can be carried in the feces for several months and can be transmitted by contaminating water, food and other daily necessities. In addition, oral live attenuated vaccines, after being excreted in the stool, have the potential to regain virulence in the external environment and infect other susceptible people.

Poliomyelitis, also known as poliomyelitis, is an acute infectious disease caused by the poliovirus, which is very contagious. Polio is currently the only known natural reservoir of poliovirus. In our country, it is currently caused by the polio wild-type virus, mainly affecting children under 15 years of age.

The main route of transmission of polio is mainly fecal-oral transmission, that is, the virus enters the intestine through the mouth, and then multiplies in the intestine, which is often referred to as the disease enters through the mouth.

Polio actually has a greater impact on children, 90%-95% of polio is a hidden infection, there may be no symptoms, and some children may have fever, headache, sore throat, fatigue, etc. If the poliovirus invades the nervous system, the child may develop flaccid paralysis and, in severe cases, death from paralysis of the respiratory muscles. There is currently no effective way to prevent polio, and vaccination is the most critical step in preventing infection.

Therefore, for polio, the main way of transmission is fecal-oral transmission, and it is necessary to vaccinate the child on time to ensure that the child does not get sick.

The main route of transmission of polio is through direct contact with fecal-oral infection. Transmission is easy if exposed to items containing poliovirus, and faecally contaminated hands and food are the main vectors of polio.

1 The causative agent of polio is poliovirus, which is easy to grow in the tissue cells of primates. Because there is a receptor on the surface of human cells that has a specific affinity for viral VPI, humans are the only natural reservoir of poliovirus. Poliovirus is a neurotropic virus, which mainly invades the motor nerve cells of the central nervous system of Peihu, and mainly damages the motor neuron in the anterior horn of the spinal cord, which seriously endangers the health of children.

2 Patients and carriers of the virus are the source of polio infection, and asymptomatic patients with hidden infection and paralysis are not easy to detect, and the transmission of pure disease in Benga still plays a major role. The incubation period of the disease ranges from 3 to 35 days, and patients are contagious from the end of the incubation period to the entire course of the disease.

3 Polio conforms to the law of spreading from a central source of infection to surrounding contacts. Oral transmission is the main mode of transmission of the disease, the virus is excreted with feces and pharyngeal secretions, and is transmitted through sewage, food, utensils, fruits and vegetables, hands, clothes, toys, etc. Intestinal transmission is the main route of transmission of polio, but in the early stages of the disease, pharyngeal detoxification can be transmitted through droplets.

4 people are generally susceptible to spinal epiglottis, and different clinical manifestations can appear after infection, among which the main patients are mild patients who are not easy to be diagnosed and those with hidden infection, and there are fewer paralytic patients. Humans are infected with the ability to develop long-lasting immunity to isotype viruses, and the neonatology department obtains fetal antibodies from the mother, which gradually disappear after birth and are reduced to a minimum level at 3-4 months. Therefore, the incidence of the disease rarely occurs 4 months ago, and the incidence increases later, with the highest incidence in children aged 1-5 years.

The virus of polio is very contagious and is mainly transmitted through fecal-oral transmission, that is, through the feces, contaminated water, food, hands, household utensils and toys of infected people, fecal-oral transmission is the main mode of transmission, and it can also be transmitted through mouth-to-mouth.

At the beginning of the infection, some people can excrete the virus in the pharynx, and it can be transmitted through droplets, that is, through the respiratory tract, but it lasts for a relatively short time. Poliomyelitis is an acute infectious disease of the digestive tract caused by poliovirus, mainly involving the anterior horn cells of the central nervous system, the vast majority of people are infected with hidden infection, some patients present with fever, sore throat, limb pain, a few cases of limb flaccid paralysis, severe will die due to respiratory paralysis.

Polio is transmitted through the digestive tract and respiratory tract.

1.Polio refers to a series of complications caused by poliovirus infection, which causes damage to the nervous system.

2.The transmission routes of the digestive tract are: fecal-oral transmission, oral-oral transmission, and it is necessary to strengthen food hygiene, drinking water hygiene and other issues.

3.The respiratory transmission route is as follows: People with poliovirus can spread the virus through respiratory droplets in the air through sneezing, talking, etc., so as to infect susceptible people.

If a person with poliovirus infection is found to have a history of close contact with the period and has a series of clinical symptoms, he should seek medical attention immediately to achieve early detection, early diagnosis and treatment, and early isolation to reduce the spread of the virus.

Answer]: File call D

The poliovirus infects the human body through the fecal-oral route and invades the motor nerve cells of the anterior horn of the spinal cord, resulting in flaccid paralysis, which is more common in children and is also known as polio.

The pathogenesis of polio is as follows: The virus enters the human body through the mouth, proliferates in the tonsils, nasopharynx, and lymphoid tissues of the small intestine, and the viral outer membrane protein VP1 induces the body to produce specific neutralizing antibodies, which clears the virus and forms a hidden infection. The virus enters the blood circulation and forms viremia, which invades non-nervous tissues such as the respiratory tract, digestive tract, heart, and kidneys, causing prodromal symptoms.

If there is a sufficient amount of neutralizing antibodies in the body, the virus is cleared, and the disease can stop developing, manifesting as a stupponic infection. Large viral load, strong virulence or poor immune delayed tolerance function, spread to the central nervous system along the axons of peripheral nerves, and further extend to the spinal cord or early spring brain through lower motor neuron fibers, and the corresponding clinical manifestations appear, and the mild ones do not appear paralyzed, which is non-paralyzed; Severe lesions can cause paralysis, which is the paralytic type.

In polio patients, infectious excreta are predominantly ()a blood. b Nasopharyngeal traces, plum secretions.

c Ocular discharge.

d.Urine. e Feaster's feces (correct answer).

Answer] :d spine hollow polio virus infects the human body through a fecal fissure and blindness, invading the motor nerve cells of the anterior horn of the spinal cord, resulting in flaccid paralysis, which is more common in children, so it is also called polio, and other options do not meet the topic.