What comes into your mind when you heard the the word "bacteria"?
When we heard bacteria, the frirst thing that we think is all about dirts and diseases. But what is the true meaning of BACTERIA?
The word bacteria is a plural form of bacterium comes from Greek word "bakteria" which means "little stick". Bacteria are microscopic living organisms, usually one-celled that can be found everywhere. They can be dangerous, such as when they cause infections. They can also beneficial to our life, because of their usefulness that can help our daily life. They can be Independent (free living organisms) or Parasites (depend on other organisms for life). They can reproduce by fission.
Bacteria can be classified using GRAM STAIN TEST, who developed by Hans Christian Gram in the 1800s. It is a method for classifying different types of bacteria using a chemical stain and viewing through a microscope. Most bacteria are classified into 2 groups. The Gram-positive and Gram-negative. We classified the bacteria as Gram-positive if it has thick layer of peptidoglycans that can stained purple by the crystal violet dye. so that the bacteria apper purple or blue. While the Gram-negative has thin layer of peptidoglycans, so they cannot retain the crystal viole dye and thus they appear red or pink due to the retention of the counter stain.
Gram-positive bacteria can also cause different diseases. Some of these diseases are Anthrax, Rheumatic fever, Diphtheria, Botulism, Septic sone throat, Boils, Tetanus, Gas gangrene, and Toxic shock syndrome.
Gram-negative can cause many types of infections and are spread to humans in a variety of ways. Several species, including Escherichia coli, are commoncausesof food–borne disease. Vibrio cholerae—thebacteria responsible for cholera—is a waterborne pathogen.Gram-negativebacteria can also cause respiratory infections, such as certain typesof pneumonia,and sexually transmitted diseases, including gonorrhea. Yersinia pestis, theGram-negative bacterium responsible for plague, is transmitted to people through the biteof an infected insect or handling an infected animal.
Bacteria can be classified using GRAM STAIN TEST, who developed by Hans Christian Gram in the 1800s. It is a method for classifying different types of bacteria using a chemical stain and viewing through a microscope. Most bacteria are classified into 2 groups. The Gram-positive and Gram-negative. We classified the bacteria as Gram-positive if it has thick layer of peptidoglycans that can stained purple by the crystal violet dye. so that the bacteria apper purple or blue. While the Gram-negative has thin layer of peptidoglycans, so they cannot retain the crystal viole dye and thus they appear red or pink due to the retention of the counter stain.
Gram-positive bacteria can also cause different diseases. Some of these diseases are Anthrax, Rheumatic fever, Diphtheria, Botulism, Septic sone throat, Boils, Tetanus, Gas gangrene, and Toxic shock syndrome.
Gram-negative can cause many types of infections and are spread to humans in a variety of ways. Several species, including Escherichia coli, are commoncausesof food–borne disease. Vibrio cholerae—thebacteria responsible for cholera—is a waterborne pathogen.Gram-negativebacteria can also cause respiratory infections, such as certain typesof pneumonia,and sexually transmitted diseases, including gonorrhea. Yersinia pestis, theGram-negative bacterium responsible for plague, is transmitted to people through the biteof an infected insect or handling an infected animal.
