What is the epidemiology of poliovirus?
Poliovirus is highly infectious, with seroconversion rates among susceptible household contacts of children nearly 100%, and greater than 90% among susceptible household contacts of adults.
What is the epidemiologic triangle?
Among the simplest of these is the epidemiologic triad or triangle, the traditional model for infectious disease. The triad consists of an external agent, a susceptible host, and an environment that brings the host and agent together.
What are the risk factors of polio?
Factors that increase the risk of developing poliomyelitis, after infection with poliovirus include:
- Muscle trauma (provocation poliomyelitis)
- Excessive exercise (provocation poliomyelitis)
- Injections (provocation poliomyelitis)
- Pregnancy.
- B-cell immunodeficiency.
- Tonsilectomy.
Which pathogen is responsible for causing polio in children?
Polio, or poliomyelitis, is a disabling and life-threatening disease caused by the poliovirus. The virus spreads from person to person and can infect a person’s spinal cord, causing paralysis (can’t move parts of the body).
What is the epidemiological triangle for Covid?
The epidemiological triad (Figure) helps us understand the spread of diseases through 3components: agent, environment, and host. In the context of COVID-19, the agentis the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), including the pathogenicity and virulence of various strains.
What is bulbar polio?
Definition. A form of paralytic poliomyelitis affecting neurons of the medulla oblongata of the brain stem. Clinical features include impaired respiration, hypertension, alterations of vasomotor control, and dysphagia. Weakness and atrophy of the limbs and trunk due to spinal cord involvement is usually associated. (
The Epidemiologic Triangle The Epidemiologic Triangle is a model that scientists have developed for studying health problems. It can help your students understand infectious diseases and how they spread. and facts. The Triangle has three corners (called vertices): Agent, or microbe that causes the disease (the “what” of the Triangle)
What is the epidemiology of polio?
EPIDEMIOLOGY OF POLIO 1. EPIDEMIOLOGY OF POLIO DR. MAHESWARI JAIKUMAR. [email protected] 2. POLIO is a vaccine preventable communicable disease 3. PATHOLOGY • The main pathology is in the anterior horn cells. 4. POLIO • Poliomyelitis is an acute viral infection caused by an RNA virus.
What is the epidemiologic triangle vertex of chickenpox?
The Epidemiologic Triangle Vertex 1. The Agent—“What” The agent is the cause of the disease. The agent is usually a microbe, an organism too small to be seen with the naked eye. Most people call an agent a “germ.” My research on the “agent” for chickenpox shows that it is:
What is the pathophysiology of polio paralysis?
Poliovirus-induced destruction of motor neurons of the anterior horn of the spinal cord and brain stem cells results in distinctive paralysis. Paralytic disease may be caused by wild-type polioviruses, attenuated polioviruses in oral vaccine, or by vaccine-derived polioviruses