The Impact of Microorganisms on Human Affairs

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The Impact of Microorganisms on Human Affairs What is microbiology? Microbiology is the study of microorganisms or microbes. The word micro means small in Greek, implying that microbes are very minute or small life forms that cannot be seen with just the naked eye. One would need a microscope to see these small life forms. Microbes are everywhere and have a large impact on the world. It all started when one of the most important discoveries in history was made in 1665. Englishman, Robert Hooke discovered “little boxes” or “cells” in a slice of cork through the microscope and explained that these were life’s smallest structural unit (Tortora et al, 2010). This event marked the beginning of the cell theory, that all living things are…show more content…
This bacterium is normally found in the colon. The bacterium may come in contact with the stomach by ingestion and certain strains can cause food poisoning which leads to diarrhea, dehydration, and discomfort. Some diseases thought to be noninfectious may involve microbial infections such as Helicobacter pylori. This common bacterium is pathogenic and affect about half the world’s population. This bacterium has been known to be the cause of gastric ulcers in the upper GI tract (The Normal Bacterial Flora of Humans). Immunocompromised people are at a greater risk for infections especially respiratory infections such as pneumonia. Since their immune systems are very weak, they are susceptible to many diseases. There are several ways that these bacterium can be transmitted into the host and cause infection. The causative agents of disease can be transmitted into the host by three routes: contact, vehicles, and vectors. The most popular method of transmitting disease is by contact. Contact can be divided into three types which are direct contact, indirect contact, and droplet transmission. Direct contact is also known as person-to-person transmission where there is physical contact involved such as touching or kissing. The common cold, staphylococcal infections, hepatitis A and other infections can be transmitted during direct contact. Indirect contact involves transmission of the pathogen through a fomite, or inanimate object that is a reservoir for pathogens. The
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