The different types of pathogens are bacteria, viruses, fungi and parasites. A pathogen is a microbe or microorganism that causes an infectious disease. There are many different diseases caused by these pathogens.Know More
Although there are pathogenic microbes, not all bacteria viruses, parasites and fungi cause disease. Some are beneficial like the decomposers in nature that recycle dead matter.
Certain bacteria, which are small and uni-cellular organisms, can cause different diseases like tuberculosis, salmonella and typhoid fever. Viruses can also cause viral infections, such as hepatitis and yellow fever. Similarly, parasitic organisms cause scabies and malaria, while fungal diseases are ringworm and candida.
The way in which these infectious disease are transmitted can be through water, food, insect bites and direct and indirect contact. Some examples of diseases transmitted through an insect bite are malaria and bubonic plague. Diseases transmitted through contaminated food or water are salmonella and cholera.Learn more about Biology
The most common portal of entry for pathogens is the respiratory tract. The pathogens enter through dust particles or droplets that enter the respiratory tract. Some pathogens that enter this way are the viruses known as influenza, measles and varicella-zoster, which causes chickenpox.Full Answer >
White blood cells help fight infections in the body by attacking pathogens, such as bacteria and viruses, after they invade the bloodstream. Healthline states that these cells are formed in the bone marrow and circulate throughout the bloodstream to fight and attack pathogens.Full Answer >
The bacillus Subtilis gram stain is a way to test if a patient is infected by the bacteria. Bacillus Subtilis is an endospore.Full Answer >
Items covered in a dichotomous key include whether bacteria are Gram positive or negative, catalase positive or negative, have nitrate enzymes, and contain the enzyme coagulase. The key is a set of questions that when complete help identify the bacteria. Each question requires completion of a certain test.Full Answer >