Microorganism Bacteria Transfer Science Project
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Written by Dee
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Saturday, 07 July 2007 |
Microorganism Bacteria Transfer Science Project. Learn how diseases causes by bacteria are spread.
Science Project Idea - Microorganism Transfer
How disease germs may pass from one person to another.Naturally in considering this problem for any disease, we must consider how the germs le ve the body of the person having the disease and how they may get into the body of the well person.Germs usually leave the body in the fine particles of moisture given out in sneezing or coughing or in the sputum or other excretions of the body, and occasionally by blood sucked up by insects.Suggest ways by which disease germs may gain entrance to the body.
The problem will be considered from the standpoint of a few of the most common diseases. Tuberculosis or consumption.The most usual form of this disease is tuberculosis of the lungs.How do you think the germs may reach the outside of the body?A well person may contract the disease by breathing in the germs or in some way getting them into his mouth.Make a list of the ways in which the germs of this disease might pass from a sick person to a well person.
It has been found that the principal ways in which the germs of this disease are carried from one person to another are : (1) by personal contact of sick with well person, especially by kissing; (2) by objects handled or put into the mouth, as by food, forks, drinking cups, pencils, or towels;* (3) by fine droplets given off in coughing or while talking, (this is probably one of the most common methods) ; (4) by dust containing dried sputum ; (5) by milk or meat of tuberculous animals.
Typhoid fever.In a person sick with this disease the germs are developing in the walls of the intestine.How do you think the germs escape from the body?How do you think that they may ever reach the intestine of a well person to begin growing there to produce the poisons of the disease ?
Typhoid fever germs are taken into the body with food and drink.It hardly seems possible that anyone should ever contract typhoid fever when we realize that the germs leave the diseased person in the excretions of the body.However, food and drink may become polluted in a number of ways.Water may become contaminated by sewage; milk, by the unclean hands of milkers ; oysters or clams, by growing near the outlet of sewers ; vegetables, by manure ; fruits and ber- ries, by filthy hands ; foods of all kinds, by flies which have been crawling over the excretions of a typhoid patient.
Suggest means to be taken to prevent the spread of typhoid germs.
Unfortunately, persons who are immune to the disease may yet have the germs produced in their bodies, and be unconscious sources of infection.Thus we sometimes read of such carriers of germs as " Typhoid Mary " of New York City who, though perfectly well themselves, are a greater men- ace to the public than persons who are ill with the disease.
Other diseases may be transmitted in some of the ways in which tuberculosis and typhoid fever are transmitted, while some are carried by somewhat different methods.Diphtheria is a disease of the throat.Suggest how it might be transmitted, and how its spread may be prevented.The germ that is supposed to cause influenza is found in the secretions of the mouth and nose of patients.Suggest means by which it may be spread.
Tetanus or lockjaw is produced by germs which are common in soil.They will not develop in man unless injected into- the body along with considerable dirt in a wound that closes up and prevents the access of 'air.Wounds caused by rusty nails and toy pistol explosions are especially favorable for the development of tetanus.How should a wound of this kind be treated to prevent the development of tetanus ?
The germs of pneumonia are present in the lungs and air passages.Suggest possible means of infection.Malaria germs are carried from one person to another by a certain kind of mosquito which lives near swamps and flies only at night.How can one protect himself from this disease?
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Last Updated ( Sunday, 22 July 2007 )
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