diseases are caused by agents such as bacteria‚ parasites‚ protozoa‚ fungus and virus. Bacteria exist on every surface including in the air and below sea level. Most bacteria are harmless but others are harmful to our body and can do bad to your health and internal organs‚ kidneys and the heart. Bacteria can invade into the body via the mouth‚ sexual organs‚ nose‚ eyes or any cuts which need to be cleaned and dressed. Bacteria can enter the body if food is full of bacteria or it isn’t cooked properly‚ this
Premium Infectious disease Infection Malaria
bacilli‚ in red)‚ the most common Gram stain reference bacteria Gram staining (or Gram’s method) is a method of differentiating bacterial species into two large groups (Gram-positive and Gram-negative). The name comes from its inventor‚ Hans Christian Gram. Gram staining differentiates bacteria by the chemical and physical properties of their cell walls by detecting peptidoglycan‚ which is present in a thick layer in Gram-positive bacteria.[1] A Gram-positive results in a purple-blue color while
Free Bacteria Staining Microbiology
Please answer the following questions. Your answer for each question should be a minimum of 150 words (half page). Please number your answers with the number of the question you are answering. 1. Koch was the first scientist to prove that bacteria actually cause disease. He scientifically demonstrated that a disease is caused by a particular organism. He created four general guidelines to aid in identification of disease causing pathogens. These guidelines developed from his work with purified
Free Bacteria Cell wall Staining
constructed a number of simple microscopes and observed details of numerous forms of protozoa‚ fungi‚ and bacteria” (Introduction to Microscopes‚ n.d.). During the 1700s‚ microscopes were used to further explore on the microbial world‚ and by the late 1800s‚ the light microscope had been developed. “The electron microscope was developed in the 1940s‚ thus making the viruses and the smallest bacteria (for example‚ Rickettsiae and Chlamydia) visible” (Introduction to Microscopes‚ n.d.). The studies of
Premium Microscope Bacteria Electron
Staphylococcus aureus? Vancomycin 5. Why has antibiotic resistance happened? Certain bacteria resist the effects of the antibiotics (are not killed) and multiply and spread. 6. Explain why the increase of antibiotic resistance is an outcome of evolution. Because some bacteria are naturally resistant to specific antibiotics they are not killed off by these drugs‚ and reproduce‚ creating new populations of bacteria that are resistant. Over
Premium Antibiotic resistance Bacteria
another class of organisms called eukaryotes. Prokaryotes and Eukaryotes are similar in their chemical composition and chemical reactions. Prokaryotes have peptidoglycan in the cell wall. Prokaryotes are Bacteria that are unicellular. Most Bacteria multiply by binary fission. There are three kinds of bacteria shapes: coccus‚ bacillus and spiral.
Premium Eukaryote Bacteria DNA
eyeball" (Medlineplus). Corneal Ulcer has many different names‚ depending on the microorganism that causes the ulcer. Some of the major diseases include Bacterial Keratitis‚ Fungal Keratitis‚ Acanthamoeba Keratitis‚ and Herpes Simplex Keratitis. Bacteria‚ fungi‚ amoebae‚ and viruses are the prime cause for these diseases. These microorganisms settle in the cornea‚ grow‚ and feed on the cornea. This process causes a corneal ulceration. Contact lenses are the leading way these microorganisms enter
Premium Contact lens Bacteria Eye
Antibiotic resistance results from bacteria changing in ways that make those antibiotics no longer useful. Resistance is a common yet problematic issue in treating pulmonary exacerbations or infections in people with Cystic Fibrosis (CF). Not all bacteria are bad. However‚ there are some that can cause infections. As bacteria are exposed to antibiotics over time‚ resistance may develop‚ and the number of antibiotics we have to kill the bacteria decreases as well. Thus‚ it is important to learn
Premium Antibiotic resistance Bacteria Staphylococcus aureus
Bacteriophage is a term that means bacteria eater‚ it describes the agent’s ability to kill bacteria. Bacteriophages can infect and create more copies of itself inside of a bacterial host which is why they are considered pathogenic phages (Jassim et al‚ 2014). Overall‚ Bacteriophages are one of the most ordinary and unique organisms in the global sum of all ecosystems that can be used to make the world a healthier place to sustain human life. In today’s society the overuse of antibiotics
Premium Bacteria Antibiotic resistance
Class Total Marks / 45 Assignment 1 1. Explain the principle of positive staining. (3 marks) Positive staining is done by staining the cell walls of Gram-positive bacteria with crystal violet. The cell wall of Gram-positive bacteria is made up of a thick layer of peptidoglycan which undergoes dehydration during decolourisation causing the pores to shrink. This shrinkage of pores traps CV-I complex and stain the cell purple. 2. Using a flow chart
Free Bacteria Staining Gram staining