Many microbial agents can commonly move from an affected person to someone else in a variety of ways. In other words, they can be ‘communicated’, and so are also called communicable diseases. Such disease-causing microbes can spread through the air. This occurs through the little droplets thrown out by an infected person who sneezes or …
We have seen that the entire diversity seen in the living world can be classified into a few groups. This classification is based on common characteristics between different organisms. Organisms that can cause disease are found in a wide range of such categories of classification. Some of them are viruses, some are bacteria, some are …
For many years, everybody used to think that peptic ulcers, which cause acidity– related pain and bleeding in the stomach and duodenum, were because of lifestyle reasons. Everybody thought that a stressful life led to a lot of acid secretion in the stomach, and eventually caused peptic ulcers. Then two Australians made a discovery that …
As we have seen, it is important to keep public health and community health factors in mind when we think about causes of diseases. Wecan take that approach a little further. It is useful to think of the immediate causes of disease as belonging to two distinct types. Onegroup of causes is the infectious agents, …
If there is a baby suffering from loose motions, we can say that the cause of the loose motions is probably an infection. we find that the infection came through unclean drinking water. But many babies must have had this unclean drinking water. So, why is it that onebaby developed loose motions when the other …
Acute and chronic diseases have different effects on our health. Any disease that causes poor functioning of some part of the body will affect our health. This is because all functions of the body are necessary for being healthy. But an acute disease, which is over very soon, will not have time to cause major …
The manifestations of disease will be different depending on a number of factors. Some diseases last for only very short periods of time,and these are called acute diseases. We all know from experience that the common cold lasts only a few days. Other ailments can last for a long time, even as much as a …
Let us now think a little more about diseases. There are many tissues in the body. These tissues make up physiological systems or organ systems that carry out body functions. Each of the organ systems has specific organs as its parts, and it has particular functions. So, the digestive system has the stomach and intestines, …
