A disease agent

A disease agent is something which causes an infectious disease. Here are five kinds of disease agents.

Viruses are the smallest disease agents. There are viruses all around you. You cannot see them without using a special microscope. Most viruses are harmful. Have you ever had a cold or the fllu Have you ever had measles or mumps? These diseases are caused by viruses.

Bacteria are the most common form of life on the Earth. There are bacteria in the water and in the soil. There are bacteria in your body and on your body. Many kinds of bacteria do not harm you. Others cause diseases. Have you ever had strep throat? Strep throat is caused by bacteria.

Protozoa are one-celled animal-like disease agents. Protozoa are small, but they are larger than bacteria. Sometimes they get into уоur digestive system. You may drink or eat food that contains them. How will protozoa affect you? They may cause problems in the digestive system.

Fungi are plant-like agents which have no roots, stems, or leaves They may be helpful or harmful. Have you ever seen mushrooms growing in a field? Mushrooms are a kind of fungi. Fungi can live under a fingernail. They can be found on the cells that form a nail Other kind of fungus grows between your toes. It may also grow on the soles of your feet. This infectious disease is called athlete's foot

Parasitic worms are worms that live in or on another living or ganism. A host is a living organism on which an agent lives and gets its food. Here is an example of what a parasitic worm can do. A tape worm is a parasitic worm that may be found in some kinds of meat The tapeworm can be killed if the meat is fully cooked. Suppose you eat meat that is not fully cooked. You may get a tapeworm inside you You become a host because the tapeworm is living inside you. It gets its food from your blood. Then your body cells do not get the food they need. You become tired and ill.

Infectious Diseases: Measles and Scarlet Fever

Infectious diseases can pass from an infectious person to a healthy person in different ways.

Measles

Measles is a very infectious disease. The disease passes from one child to another. The first symptoms are sneezing and coughing. The disease begins with signs of a heavy cold, a running nose and a dry cough. The temperature is high and the child has a dislike of light.

Rash appears on the third or fourth day behind the ears and kround the mouth, and then covers the body.

The nurse must be very careful to prevent the spread of infection, the nurse must take care of the mouth hygiene. The patient's mouth and lips must be clean and moist.

Scarlet Fever

Scarlet fever is an infectious disease. We can often see children ill with this disease, and only sometimes grown-ups.

The disease passes from one person to another through the nose and mouth. The beginning of the disease is quick. The patient has.i sore throat, fever, headache, and vomits often. The face is flushed and the skin feels hot and dry. The temperature rises quickly on the first day and remains high for a few days. The rash appears on the second day. After the temperature falls the skin begins to peel. We must isolate the child with scarlet fever and put him/her in bed. When the temperature is high the nurse gives him/her a fluid diet and when the temperature falls she gives him/her nourishing food.

Дата добавления: 2015-08-13