Coliform bacteria are present in the environment and feces of all warmblooded animals and humans. Ncert science textbooks class 612, wikipedia microbes or microorganisms microorganisms include bacteria, fungi, protozoa, some algae, viruses, viroids and also prions that are proteinacious infectious agents. Bacteria that cause diseases are known as pathogenic bacteria. Proteobacteria are further classified into the classes alpha, beta, gamma, delta and epsilonproteobacteria, each class having separate orders, families, genera, and species. Gk, general studies, optional notes for upsc, ias, banking, civil services. However, disease causing species cause a range of human bacterial illnesses that range from mild to potentially lifethreatening. The mouth is colonized by 200 to 300 bacterial species, but only a limited number of these species participate in dental decay caries or periodontal disease. Bacterial diseases 12 common diseases that are caused by. Diseases caused by bacteria are responsible for many deaths in the world since many centuries. Foods most likely to cause food poisoning cdc food safety. Unsanitary food preparation and handling can also encourage bacterial growth.
Your body can be more prone to bacterial infections when your immune system is compromised by. Bacteria and viruses are the most common cause of food poisoning. Disease causing bacteria produce toxins powerful chemicals that damage cells and make you ill. Microbiology of dental decay and periodontal disease. Bacteria are found in my water coliform bacteria are not considered a normal inhabitant of groundwater or disinfected surface water. Know who, when, and how to seek evaluation by occupational health following an unprotected. Dental decay is due to the irreversible solubilization of tooth mineral by acid produced by certain bacteria that adhere to the tooth. Infection of the stomach with the bacterium heliobacter pylori is a wellknown cause of peptic ulcer disease and may increase the risk for stomach cancer.
Microbiological classification of infectious diseases. Chronic airway infection is the hallmark of cf lung disease. Common diseases of tomatoes part ii diseases caused by. Nonhazardous bacteria also help prevent diseases by occupying places that the pathogenic, or disease causing, bacteria want to attach to. Bacterial diseases occur when pathogenic bacteria get into an area of the body that is normally sterile, such as the bladder, or when they crowd out the helpful bacteria in places such as the intestines, vagina or mouth. Nov 10, 2014 role of microbes, effect on infectious disease dynamics date.
Bacteria that cause disease are called pathogenic bacteria, and they do so by producing poisonous substances called endotoxins and exotoxins. Their presence suggests that there has been a breach, failure, or other change in the integrity of the water system. They can carry harmful germs that can make you very sick if the food is contaminated. The symptoms may range from mild to serious, and some can be deadly. Pinkbook principles of vaccination epidemiology of vpds cdc. The gram stain attaches to peptidoglycan in the bacterial cell wall. Most types of coliform bacteria are harmless to humans, but some can cause mild illnesses and a few can lead to serious waterborne diseases. Apr 22, 2020 among thousands species of bacteria, there is only a small amount of disease causing bacteria using antibiotics is an effective way to treat bacterial infections, however overusing antibiotics may lead to bacteria that are resistant to antibiotics. Important diseases and causative agents for exam study. Although many types of harmless bacteria live on the skin, disease causing bacteria can cause a variety of skin infections. Bacteria that retain the color of the dye are called gram positive. List of human diseases caused by bacteria,virus,fungi,protozoa.
Most bacteria wont hurt you less than 1 percent of the different types make people sick. Bacteria are microscopic prokaryotic a cell in which the nuclear material is not enclosed by a. Chapter 2 disease and disease transmission an enormous variety of organisms exist, including some which can survive and even develop in the body of people or animals. Not all bacteria are harmful, and some bacteria that live in your body are helpful. Bacterial diseases were once leading causes of death. The symptoms and severity of food poisoning vary, depending on which bacteria or virus has contaminated the food.
However, their presence in drinking water indicates that disease causing organisms pathogens could be in. Your body can be more prone to bacterial infections when your immune system is compromised by a virus. Review your infection prevention and control policies and. Review your infection prevention and control policies and cdc infection control recommendations for covid19 for. List of diseases caused by bacteria and viruses in humans. Bacteria can also cause disease by releasing that harm the body. Bacteria are also used in making healthy foods like yogurt and cheese. Proteobacteria is a phylum of gramnegative bacteria discovered by carl woese in the 1980s based on nucleotide sequence homology. Live vaccines are derived from wild, or diseasecausing, viruses or bacteria. Here presented the list of diseases caused by bacteria and viruses in humans. Bacterial pathogens are introduced to new sites on contaminated seed or transplants. Once established, bacteria are spread by splashing rain, water runoff, wind. Mar 17, 2014 infection is a successful invasion of pathogenic microorganisms including bacteria, viruses, fungi and algae.
Studies show symbiotic microbes can help prevent infection by disease. Pdf the first malayali appeared in indian postal stamp. Chemical control strategies that may be required are updated annually in the osu extension agents handbook of insect, plant disease and weed control circular e832. Bacterial classification, structure and function introduction the purpose of this lecture is to introduce you to terminology used in microbiology. Bacteria are classified by their gram stain characteristics. Stay up to date on the latest information about signs and symptoms, diagnostic testing, and case definitions for. Microbes cause disease in the course of stealing space.
They produce poisonous substances called exotoxins and endotoxins that present various mild to serious symptoms. Raw foods of animal origin are the most likely to be contaminated, specifically raw or undercooked meat and poultry, raw or lightly cooked eggs, unpasteurized raw milk. Pathogenic bacteria are bacteria that can cause disease. May 02, 2018 most human infections in world today are either caused by viruses or bacteria. Bacterial diseases bacteria are microscopic, singlecelled organisms bacte. Here you find the list of diseases in a tabular form and also details of some important ones.
One way bacteria can cause disease is by breaking down and damaging of the infected organism. List of human diseases caused by bacteria and viruses. They can also contribute to chronic diseases and conditions, and are now being linked with coronary artery disease, diabetes, and certain types of cancer, multiple sclerosis and chronic lung disease. Bacteria diseases, viral diseases, fungus diseases, protozoa diseases list of human diseases caused by bacteria,virus,fungi,protozoa psc online book. As a result, bacteria thrive and produce acidic waste that lowers the salivary ph. Bacteria cause diseases both in the plants and animals and are spread all over the world. The simplest of organisms, bacteria are thought to be the most ancient. Oct 11, 2019 some foods are more associated with foodborne illnesses and food poisoning than others. Infections and infectious diseases whoeurope world health. To prevent illness, always follow the food safety steps. Jan 05, 2019 the vast majority of bacteria do not cause disease, and many bacteria are actually helpful and even necessary for good health. The overwhelming majority of bacteria do not cause disease. Bacterial diseases bacterial infection symptoms, causes.
Disease causing microorganisms may also have gained entry into the water system. For instance, lactobacillus acidophilus a harmless bacterium that resides in your intestines helps you digest food, destroys some diseasecausing organisms and provides nutrients. Cover different classification schemes for grouping bacteria, especially the use of the gram stain 2. A virus is micro organism, it is usually very difficult to kill. The gram stain attaches to peptidoglycan in the bacterial cell. Both types of bacteria are capable of causing different infections to humans. Apr 21, 2020 bacterial infections are one cause of foodborne illness.
Disease causing microorganisms safe drinking water foundation. Role of microbes, effect on infectious disease dynamics date. Partial list of diseases caused by untreated sewage. Gram staining is the application of a crystal violet dye to a culture of bacteria. Coliform bacteria are often referred to as indicator organisms because they indicate the potential presence of disease causing bacteria in water. List of diseases caused by bacteria in plants include. In the past ten years, variant toxinproducing strains of c. Unlike the diseases caused by other microorganisms like fungi and protozoa these bacterial infections are deadly. One way to control bacterial growth is by subjecting the bacteria to high temperatures during a process known as. Some bacteria help to digest food, destroy disease causing cells, and give the body needed vitamins. Partial list of diseases caused by untreated sewage parasitic infections kingdom animalia a parasite is a disease causing organism that lives on or in a human or another animal and derives its nourishment from its host.
Microbes or microorganisms diseases caused by microorganisms diseases caused by bacteria, viruses, protozoans and fungi. In the 1980s, researchers studying the diseasecausing. Common infection sites include the lungs, urinary tract, bloodstream, nervous system, and soft tissues. Like most bacteria, they can cause infections throughout the body. Some bacteria protect us from disease by attacking the. Nausea, vomiting, diarrhea, fever, chills, and abdominal pain are common symptoms of food poisoning. Bacteria live on your skin, in your intestine and in many other body locations. In this manual infectious agents which cause infection and illness are called pathogens. The blight of paddy, citrus canker, angular leaf spot in cotton, tumors in plants, rot in vegetables etc.
Start studying chapter 21 disease causing bacteria. List of some common bacterial infections with their treatment. Although most bacteria are harmless or often beneficial, some are pathogenic, with the number of species estimated as fewer than a hundred that are seen to cause infectious diseases in humans. Pdf pathogenesis of bacterial infection researchgate. If the organism can cause infection, it is an infectious agent. Clostridium difficile infection cdi is the primary cause of antibioticassociated diarrhea and is a significant nosocomial disease. Poor oral hygiene will cause food debris and dental plaque to form a dense bacterial biofilm. Jan 05, 2017 disease causing microbes can also be called pathogens, germs or bugs and are responsible for causing infectious diseases. List of human diseases caused by bacteria,virus,fungi. The pathogens causing the diseases covered in this manual include viruses, bacteria, rickettsiae, fungi, proto zoa, and helminths worms. Improved sanitation, vaccines, and antibiotics significantly decreased mortality rates.
These wild viruses or bacteria are attenuated, or weakened, in a laboratory, usually by repeated culturing. Bacteria diseases, viral diseases, fungus diseases, protozoa diseases. Pneumonia is caused by bacteria called streptococcus pneumonia. Role of microbes, effect on infectious disease dynamics. Bacterial colonization of the respiratory tract occurs within the first few days of life in cf infants. Learn more about types of bacterial disease and the mechanism by which bacteria cause illness. Gramnegative bacteria are a specific type of bacteria with unique characteristics. These substances are responsible for the symptoms that occur with bacteria related diseases.1156 748 637 793 252 540 1128 139 687 911 459 287 1334 188 300 321 1460 256 788 1476 145 998 837 366 913 1002 1152 1066 243 834 1201 1430 297 1010 101 537