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Campylobacter Invasive Antigen
''Campylobacter'' is a type of bacteria that can cause a diarrheal disease in people. Its name means "curved bacteria", as the germ typically appears in a comma or "s" shape. According to its scientific classification, it is a genus of gram-negative bacteria that is motile. The germ is common in nature and in domestic animals. It is frequently found in raw food of vegetable and animal origin. Its numbers can be very high in some foods, like raw poultry. Due to their diverse natural reservoir, some ''Campylobacter'' can also be detected in the air, although not at an epidemiologically significant level. The disease that some of the species of the bacteria can cause is called campylobacteriosis. At least a dozen species of ''Campylobacter'' have been implicated in human disease, with ''C. jejuni'' (80–90%) and '' C. coli'' (5–10%) being the most common. '' C. jejuni'' is recognized as one of the main causes of bacterial foodborne disease in many developed countries. It is th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Campylobacter Jejuni
''Campylobacter jejuni'' is a species of pathogenic bacteria that is commonly associated with poultry, and is also often found in animal feces. This species of microbe is one of the most common causes of food poisoning in Europe and in the US, with the vast majority of cases occurring as isolated events rather than mass outbreaks. Active surveillance through the Foodborne Diseases Active Surveillance Network (FoodNet) indicates that about 20 cases are ''diagnosed'' each year for each 100,000 people in the US, while many more cases are undiagnosed or unreported; the CDC estimates a total of 1.5 million infections every year. The European Food Safety Authority reported 246,571 cases in 2018, and estimated approximately nine million cases of human campylobacteriosis per year in the European Union. In Africa, Asia, and the Middle East, data indicates that ''C. jejuni'' infections are Endemic (epidemiology), endemic. ''Campylobacter'' is a genus of bacteria that is among the most ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cattle
Cattle (''Bos taurus'') are large, domesticated, bovid ungulates widely kept as livestock. They are prominent modern members of the subfamily Bovinae and the most widespread species of the genus '' Bos''. Mature female cattle are called cows and mature male cattle are bulls. Young female cattle are called heifers, young male cattle are oxen or bullocks, and castrated male cattle are known as steers. Cattle are commonly raised for meat, for dairy products, and for leather. As draft animals, they pull carts and farm implements. Cattle are considered sacred animals within Hinduism, and it is illegal to kill them in some Indian states. Small breeds such as the miniature Zebu are kept as pets. Taurine cattle are widely distributed across Europe and temperate areas of Asia, the Americas, and Australia. Zebus are found mainly in India and tropical areas of Asia, America, and Australia. Sanga cattle are found primarily in sub-Saharan Africa. These types, sometime ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stewart Stockman
Sir Stewart Stockman MRCVS (1869–1926) was a 19th/20th century British veterinarian who served as Chief Veterinary Officer (United Kingdom), Chief Veterinary Officer to the Ministry of Agriculture and as President of the Royal College of Veterinary Surgeons for the year 1923/24 and President of the National Veterinary Association. He was an expert on foot and mouth disease. Life He was born on 27 September 1869 in Wellington Street in Leith (the harbour area of Edinburgh) the fourth son of William John Stockman (d. 1908), a flour importer, and his wife. He was younger brother to Ralph Stockman. The family moved to a larger house at 2 Bonnington Place in 1870. He was educated at the Royal High School, Edinburgh then studied Veterinary Science at the Dick Vet, Royal Veterinary College on Clyde Street in Edinburgh under Prof Thomas Walley. He did postgraduate studies in animal pathology in both Paris and Brussels and returned to Edinburgh in 1892 as Professor of Pathology and B ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
John McFadyean
Sir John McFadyean FRSE LLD (1853 - 1941) was a Scottish veterinary surgeon and Professor of Veterinary Science. He was Principal of (and a Professor at) the Royal Veterinary College from 1894 to 1927. In 1906 he was the first person to isolate the Campylobacter species of bacteria, and due to this made major advances in public health. Life He was born in Barrachan in Wigtownshire on 17 June 1853, the son of Andrew McFadyean. He was educated at the Ewart Institute in Newton Stewart. For the first few years after leaving school he worked on his father's farm but in October 1874 he entered the Dick Veterinary College in Edinburgh from whence he graduated in April 1876. He was appointed Lecturer in Anatomy at the college in the following academic year. He lodged at the college at 8 Clyde Street (now the site of Edinburgh's main bus station). In the 1880s his interests became fixed on bacteriology and pathology and the subsequent sections of comparative anatomy were never co ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Theodor Escherich
Theodor Escherich (; 29 November 1857 – 15 February 1911) was a German- Austrian pediatrician and a professor at universities in Graz and Vienna. He discovered and described the bacterium ''Escherichia coli''. Life and achievements Family and education Theodor Escherich was born in Ansbach, as the younger son of ''Kreismedizinalrat'' (District Medical Officer) Ferdinand Escherich (1810−1888), a medical statistician, and his second wife, Maria Sophie Frederike von Stromer, daughter of a Bavarian army colonel. When Theodor Escherich was five, his mother died, and five years later Ferdinand Escherich moved to Würzburg to take up his former position as ''Kreismedizinalrat'' and married his third wife. When Theodor was 12, he was sent to a boarding school run by Jesuits in Feldkirch, Austria for three years. Later, he finished secondary education in Würzburg, where he attended a ''Gymnasium'' (classical language high school) and took his ''Abitur'' examination in 1876 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Quinolone Antibiotic
Quinolone antibiotics constitute a large group of broad-spectrum bacteriocidals that share a bicyclic core structure related to the substance 4-quinolone. They are used in human and veterinary medicine to treat bacterial infections, as well as in animal husbandry, specifically poultry production. Quinolone antibiotics are classified into four generations based on their spectrum of activity and chemical modifications. The first-generation quinolones, such as nalidixic acid, primarily target Gram-negative bacteria and are mainly used for urinary tract infections. Second-generation quinolones introduced fluorine atoms into their structure, creating fluoroquinolones, which significantly expanded their antibacterial activity to include some Gram-positive bacteria. Third-generation fluoroquinolones further improved Gram-positive coverage, while fourth-generation fluoroquinolones offer broad-spectrum activity, including anaerobic bacteria. Only quinolone antibiotics in generat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nitrate Reductase Test
The nitrate reductase test is a test to differentiate between bacteria based on their ability or inability to reduce nitrate (NO3−) to nitrite (NO2−) using anaerobic respiration. Procedure Various assays for detecting nitrate reduction have been described.V.B.D. Skerman, A guide to the identification of the genera of bacteria, The Williams & Wilkins Co., Baltimore, MD, p.218 - 220 (1967). One method is performed as follows: #Inoculation, Inoculate nitrate broth with an isolate and incubate for 48 hours. #Add two nitrate tablets to the sample. If the bacterium produces nitrate reductase, the broth will turn a deep red within 5 minutes at this step. #If no color change is observed, then the result is inconclusive. Add a small amount of zinc to the broth. If the solution remains colorless, then both nitrate reductase and nitrite reductase are present. If the solution turns red, nitrate reductase is not present. References Bacteriology Tests {{bacteria-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Catalase Test
Catalase is a common enzyme found in nearly all living organisms exposed to oxygen (such as bacteria, plants, and animals) which catalyzes the decomposition of hydrogen peroxide to water and oxygen. It is a very important enzyme in protecting the cell from oxidative damage by reactive oxygen species (ROS). Catalase has one of the highest turnover numbers of all enzymes; one catalase molecule can convert millions of hydrogen peroxide molecules to water and oxygen each second. Catalase is a tetramer of four polypeptide chains, each over 500 amino acids long. It contains four iron-containing heme groups that allow the enzyme to react with hydrogen peroxide. The optimum pH for human catalase is approximately 7, and has a fairly broad maximum: the rate of reaction does not change appreciably between pH 6.8 and 7.5. The pH optimum for other catalases varies between 4 and 11 depending on the species. The optimum temperature also varies by species. Structure Human catalase forms a t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oxidase Test
The oxidase test is used to determine whether an organism possesses the cytochrome c oxidase enzyme. The test is used as an aid for the differentiation of ''Neisseria'', ''Moraxella'', ''Campylobacter'' and ''Pasteurella'' species (oxidase positive). It is also used to differentiate pseudomonads from related species.MacFaddin JF, editor. Biochemical Tests for Identification of Medical Bacteria. 3rd ed. Philadelphia:Lippincott Williams and Wilkins; 2000. p. 363-7 Classification Strains may be either oxidase-positive (OX+) or oxidase-negative (OX-). OX+ OX+ normally means the bacterium contains cytochrome c oxidase (also known as Complex IV) and can therefore use oxygen for energy production by converting O2 to H2O2 or H2O with an electron transfer chain. The Pseudomonadaceae are typically OX+. The Gram-negative diplococci Neisseria and Moraxella are oxidase-positive. Many Gram-negative, spiral curved rods are also oxidase-positive, which includes ''Helicobacter pylori'', ''Vibrio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Coccus
Bacterial cellular morphologies are the shapes that are characteristic of various types of bacteria and often key to their identification. Their direct examination under a light microscope enables the classification of these bacteria (and archaea). Generally, the basic morphologies are spheres (coccus) and round-ended cylinders or rod shaped (bacillus). But, there are also other morphologies such as helically twisted cylinders (example '' Spirochetes''), cylinders curved in one plane (selenomonads) and unusual morphologies (the square, flat box-shaped cells of the Archaean genus '' Haloquadratum)''. Other arrangements include pairs, tetrads, clusters, chains and palisades. Types Coccus A coccus (plural ''cocci'', from the Latin ''coccinus'' (scarlet) and derived from the Greek ''kokkos'' (berry)), is any microorganism (usually bacteria) whose overall shape is spherical or nearly spherical. Coccus refers to the shape of the bacteria and can contain multiple genera, such as st ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Microaerophile
A microaerophile is a microorganism that requires environments containing lower levels of dioxygen than that are present in the atmosphere (i.e. < 21% O2; typically 2–10% O2) for optimal growth. A more restrictive interpretation requires the microorganism to be obligate in this requirement. Many microaerophiles are also capnophiles, requiring an elevated concentration of (e.g. 10% CO2 in the case of '' Campylobacter'' ). The original ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Flagellum
A flagellum (; : flagella) (Latin for 'whip' or 'scourge') is a hair-like appendage that protrudes from certain plant and animal sperm cells, from fungal spores ( zoospores), and from a wide range of microorganisms to provide motility. Many protists with flagella are known as flagellates. A microorganism may have from one to many flagella. A gram-negative bacterium '' Helicobacter pylori'', for example, uses its flagella to propel itself through the stomach to reach the mucous lining where it may colonise the epithelium and potentially cause gastritis, and ulcers – a risk factor for stomach cancer. In some swarming bacteria, the flagellum can also function as a sensory organelle, being sensitive to wetness outside the cell. Across the three domains of Bacteria, Archaea, and Eukaryota, the flagellum has a different structure, protein composition, and mechanism of propulsion but shares the same function of providing motility. The Latin word means " whip" to describe its ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
