the infectious agent gets out of the reservoir through a route of exit.
it gets transmitted to a susceptible host by a direct or indirect mode of transmission and it gets into the susceptible host through a route of entry.
if it multiplies sufficiently in the susceptible host it will cause a communicable disease.
How do they make you susceptible to noncommunicable diseases?
Physical inactivity, low fruit and vegetable intake, high fast food consumption and high cholesterol are predominant causes of cardiovascular disease and some cancers. Overweight and obesity can lead to metabolic changes and raise the risk of NCDs, including heart disease and type 2 diabetes.
What are the risk factors of communicable diseases?
Key contextual risk factors include crowded conditions, forced displacement, poor quality shelter, poor water, sanitation and hygiene conditions, lack of health care facilities and lack of adequate surveillance.
How do communicable diseases affect the world?
Communicable diseases, alone or in combination with malnutrition, account for most deaths in complex emergencies. Factors promoting disease transmission interact synergistically leading to high incidence rates of diarrhoea, respiratory infection, malaria, and measles.
What are the 4 types of communicable diseases?
Why are chronic diseases increasing?
Chronic diseases and conditions are on the rise worldwide. An ageing population and changes in societal behaviour are contributing to a steady increase in these common and costly long-term health problems. This is pushing obesity rates and cases of diseases such as diabetes upward.
What is the most common non contagious disease in the world?
The most common NCDs include cardiovascular diseases (such as heart attacks and stroke), cancers, chronic respiratory diseases (such as chronic obstructive pulmonary disease and asthma), and diabetes.
What are 3 causes of non communicable diseases?
Referred to as a “lifestyle” disease, because the majority of these diseases are preventable illnesses, the most common causes for non-communicable diseases (NCD) include tobacco use (smoking), alcohol abuse, poor diets (high consumption of sugar, salt, saturated fats, and trans fatty acids) and physical inactivity.
What is a controllable risk factor for a communicable disease?
Controllable risk factors include: Smoking. High LDL, or “bad”cholesterol, and low HDL, or “good”cholesterol. Uncontrolled hypertension (high blood pressure)
What is the meaning of communicable disease?
Medical Definition of communicable disease: an infectious disease transmissible (as from person to person) by direct contact with an affected individual or the individual’s discharges or by indirect means (as by a vector) — compare contagious disease.
What is the most common communicable disease?
So, without further ado, here are the five most common infectious diseases.
- Hepatitis B. According to current statistics, hepatitis B is the most common infectious disease in the world, affecting some 2 billion people — that’s more than one-quarter of the world’s population.
- Hepatitis C.
Why do we report communicable diseases?
Why Report? Ultimately, to protect the public’s health. Certain diseases are reportable by legal mandate (California Code of Regulations, Title 17) health care providers are required to report 83 different diseases, and laboratories are required to report 18 of those 83 diseases.
Is the common cold a communicable disease?
The common cold is an infection of the upper respiratory tract: the nose, nasal passages, and throat. There are more than 200 viruses that can cause colds. Influenza, commonly called “the flu,” is a contagious disease caused by viruses that infect the respiratory tract, including nose, throat, and lungs.
What are 3 communicable diseases?
The diseases below are among them.
- Enterovirus D68.
- Hepatitis A.
- Hepatitis B.
What is the most dangerous communicable disease?
Hepatitis C kills more Americans than any other infectious disease. An estimated 2.7-3.9 million people in the United States have chronic Hepatitis C. Approximately 75%–85% of people who become infected with Hepatitis C virus develop chronic infection.
What are the 10 communicable disease?
Some examples of reportable communicable disease include HIV, hepatitis A, B and C, measles, salmonella, measles, and blood-borne illnesses. Most common forms of spread include fecal-oral, food, sexual intercourse, insect bites, contact with contaminated fomites, droplets, or skin contact.