Biology is the branch of science concerned with the study of life: structure, growth, functioning, and evolution of living things. Although some bacteria prey on higher forms of life, relatively few are pathogens (disease-causing organisms). Meaning of Bacteriology. For example, diplococci are cocci in pairs, streptococci are chains, and staphylococci are clusters of … Bacteria Definition. bacteriology (usually uncountable, plural bacteriologies) ( biology , microbiology ) The scientific study of bacteria , especially in relation to disease and agriculture . Bacteriology is the branch and specialty of biology that studies the morphology, ecology, genetics and biochemistry of bacteria as well as many other aspects related to them. Five types of bacteria are: Coccus, Bacillus, Spirillum, Rickettsia, and Mycoplasma. - Definition, Characteristics & Examples Bacterial Cell Morphology and Classification: Definition, Shapes & Arrangements Enrich your vocabulary with the English Definition dictionary Basis of comparison Phagocytosis Pinocytosis: Definition: Phagocytosis is a type of endocytosis involved in the transport of particles sized >0.5 µm. Microbiology is a very diverse science that includes all types of organisms that exist on the micron level (or smaller), plus those that have life stages that occur on the same size scale. Definitions. Reports on the Bacteriology of Water," Proc. Plus, get practice tests, quizzes, and personalized coaching to help you succeed. Can you spell these 10 commonly misspelled words? Generally speaking, parasitology is the branch of microbiology that is concerned with the study of parasites. Definition of bacteriology in the Fine Dictionary. Bacteriology has also explored the positive and negative impact of bacteria in the environment and in human beings. Microbiology, the scientific study of microorganisms, a diverse group of generally minute simple life-forms, including bacteria, algae, and viruses. Related words - bacteriology synonyms, antonyms, hypernyms and hyponyms. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more. Abbott, Principles of Bacteriology (7th ed., London, 1905); Crookshank, Bacteriology and Infective Diseases (with bibliography, 4th ed., London, 1896); Duclaux, Traite de microbiologie (Paris, 1899-1900); Eyre, Bacteriological Technique (Philadelphia and London, 1902); Flugge, Die Mikroorganismen (3rd ed., Leipzig, 1896); Fischer, Vorlesungen fiber Bakterien (2nd ed., Jena, 1902); Gunther, Einfiihrung in das Studium der Bakteriologie (6th ed., Leipzig, 1906); Hewlett, Manual of Bacteriology (2nd ed., London, 1902); Hueppe, Principles of Bacteriology (translation, London, 1899); Klein, Micro-organisms and Disease (3rd ed., London, 1896); Kolle and Wassermann, Handbuch der pathogenen Mikroorganismen (Jena, 1904) (supplements are still being published; this is the most important work on the subject); Lofler, Vorlesungen fiber die geschichtliche Entwickelung der Lehre von der Bacterien (Leipzig, 1887); M`Farland, Text-book upon the Pathogenic Bacteria (5th ed., London, 1906); Muir and Ritchie, Manual of Bacteriology (with bibliography, 4th ed., Edin. Meaning of bacteriology with illustrations and photos. The scientific study of bacteria, especially bacteria that cause disease. Bacteriology definition: Bacteriology is the science and the study of bacteria. Pronunciation of bacteriology and it's etymology. from The American Heritage® Dictionary of the English Language, 5th Edition. : Process of intake: Phagocytosis involves the formation of pseudopodia (false feet) for the intake of molecules. See the full definition for bacteriology in the English Language Learners Dictionary, More from Merriam-Webster on bacteriology, Nglish: Translation of bacteriology for Spanish Speakers, Britannica.com: Encyclopedia article about bacteriology. Categories Bacteriology. Post navigation. bacteriology definition in the English Cobuild dictionary for learners, bacteriology meaning explained, see also 'bacteriological',bacterial',bacteria',bacterium', English vocabulary Go To The Definition Find below definitions and meanings of Bacteriology. GROUP 4 Description: Gram Negative, Aerobic/Microaerophilic rods and cocci Key differences are: pigments/fluorescent, motility, growth requirements, denitrification, morphology, and oxidase, read Genera descriptions Examples: Acinetobacter, Pseudomonas, Beijerinckia, Acetobacter GROUP 5 Giga-fren. The plural of bacterium. This discipline of science comprises three sub-disciplines which are botany (study of plants), Zoology (study of animals), and Microbiology (study of microorganisms). The definition of bacteriology is the scientific study of microscopic organisms. All Rights Reserved. However, a few species are visible to the unaided eye—for example, Thiomargarita namibiensis is up to half a millimetre long and Epulopiscium fishelsoni reaches 0.7 mm. Definition of bacteriology written for English Language Learners from the Merriam-Webster Learner's Dictionary with audio pronunciations, usage examples, and count/noncount noun labels. Because this definition was so broad, unrelated organisms were added to the genus to the point that in 1984, there were over 100 species of Pseudomonas listed in Bergey's Manual of Systematic Bacteriology. Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free! Bacteria (singular: bacterium) are classified as prokaryotes, which are single-celled organisms with a simple internal structure that lacks a nucleus, and contains DNA that either floats freely in a twisted, thread-like mass called the nucleoid, or in separate, circular pieces called plasmids. | Meaning, pronunciation, translations and examples 'This article briefly examines the pathogenesis and bacteriology of UTIs during pregnancy, as well as patient-oriented outcomes.' Commensalism Definition The term was coined in 1876 by Belgian paleontologist and zoologist Pierre-Joseph van Beneden, along with the term mutualism . He's making a quiz, and checking it twice... Test your knowledge of the words of the year. 1 : a science that deals with bacteria and their relations to medicine, industry, and agriculture. Bacteria display a wide diversity of shapes and sizes, called morphologies.Bacterial cells are about one-tenth the size of eukaryotic cells and are typically 0.5–5.0 micrometres in length. Biology Hubspot provides definition, examples and quiz for common biology terms, including anatomy, cell biology, genetics, ecology and more! The term opsonization refers to the capacity of antibodies and complement components (as well as other proteins) to coat dangerous antigens that can then be recognized by antibodies or complement receptors on phagocytic cells. Bacteriology 1. Bacteria present in the gut of humans and ruminants help in digesting food. Bacteria are sometimes called ' prokaryotes.' A bacterium is a single-celled (unicellular) microorganism that does not have a nucleus or any other membrane-bound organelles. hi guys in this article we know about heterotrophic nutrition definition types and example and what is various types of heterotrophic nutrition in animals and plant and what is heterotrophic nutrition. INTRODUCTION TO BACTERIOLOGY 1. It is bacillus-shaped and found naturally in the intestines of many animals including humans, where it produces vitamin K and b-complex vitamins. Information and translations of Bacteriology in the most comprehensive dictionary definitions resource on the web. Dr. Salleh; Medical Microbiology; Phase II; MBBS-ims, MSU; Bacteriology 1 BACTERIILOGY Lecture notes (2): Bacteria: Structure-Function-Pathogenicity Relationships Table of Contents Educational Objectives Structure -Function-Pathogenicity Relationships Capsule Cell Wall Protoplasmic Membrane Pili Flagella Summary Educational Objectives General 1. The beginnings of bacteriology paralleled the development of the microscope. Another important function is the identification of bacteria that often cause disease in man and animals, and the mechanisms of how they bring about infection. Some examples of Oceanospirillum bacteria include; O. linum, O. minutulum, 0. beijerinckii, and O. japonicum. Biology is the study of living things. Examples of Bacteria Escherichia coli is one example of a common species of bacteria. See more. Also find a similar words the begin with the same characters, end with the same characters, anagrams, reverse anagrams, word scrambles and words with similar letters. bacteriology definition in English dictionary, bacteriology meaning, synonyms, see also 'bacteriologically',bacteriologist',bacteriol.',bacteriological'. The science and study of bacteria, a specialized branch of microbiology. Bacteriology, branch of microbiology dealing with the study of bacteria. Accessed 23 Dec. 2020. Bacteria are the plural of bacterium, which are microscopic one-celled organisms. Bacteria are single-celled microorganisms which can live as independent organisms or, dependently, as parasites. Example sentences containing bacteriology Examples. The bacteriology of the infective diseases (with bibliography) is fully given in the System of Medicine, edited by Clifford Allbutt, (2nd ed., London, 1907). " Bacteriology By Glossary August 14, 2020 No Comments. adj., adj bacteriolog´ic, bacteriolog´ical. The field is concerned with the structure, function, and classification of such organisms and with ways of … Home » Microbiology » Psychrophiles – Definition, Mechanism of Survival and Examples of Psychrophilic Bacteria. Ribosomes are the spherical units in the bacterial cell where proteins are assembled from individual amino acids using the information encod… Because of the similarity of thinking and working with microorganisms other than bacteria, such as protozoa, fungi, … Definition of bacteriology. Have you ever wondered about these lines? The term refers to the general aspects of biological form and arrangement of the parts of a plant or an animal. The definition of bacteriology is the scientific study of microscopic organisms. 1. noun The study of bacteria. The study of bacteria, especially in relation to medicine and agriculture. Five types of bacteria are: Coccus, Bacillus, Spirillum, Rickettsia, and Mycoplasma. This subdivision of microbiology involves the identification, classification, and characterization of bacterial species. This has allowed researchers in the field to not only get a better understanding … WikiMatrix. ‘The new sciences of bacteriology and pharmacology are prominent examples.’ ‘By the 1860s it was inspiring the development of cellular pathology and bacteriology.’ ‘Because bacteriology is the primary emphasis in virtually all microbiology laboratories, mycology is frequently covered as a ‘required afterthought’, by someone with minimal interest or background.’ Send us feedback. If we don't currently have any definitions there is a link to check definitions on Google. Definition of BACTERIOLOGY (noun): the scientific study of bacteria. and Lond., 1908); Park, Pathogenic Micro-organisms (London, 5906); Sternberg, Manual of Bacteriology (with full bibliography, 2nd ed., New York, 1896); Woodhead, Bacteria and their products (with bibliography, London, 1891). Some cocci remain attached after binary fission, even though separate cells have been formed. In … bacteriology example sentences. Delivered to your inbox! How to use biology in a sentence. Bacteria are single-celled microorganisms which can live as independent organisms or, dependently, as parasites. Related terms [ edit ] An example of bacteriology is studying which organisms live in the human colon and are necessary for proper di… Among the better known bacteria are strep, staph, and the agents of tuberculosis and leprosy. Examples of bacteria include Acidophilus, a normal inhabitant of yogurt; Gonococcus which causes gonorrhea; Clostridium welchii, the most common cause of gangrene; E. coli, which lives in the colon and can … Each antibody targets a specific bacteria or virus. 'He was to investigate the pathology, the pesticide levels in the blubber, try to do bacteriology and virology.' The bacteria constitute a useful and essential group in the biological community. The bacteria that are transferred during a kiss help improve your immune system. Pulmonary samples may be obtained by transtracheal percutaneous needle aspiration or by physicians trained in this procedure. noun the branch of biology dealing with the structure, function, uses, and modes of existence of microscopic organisms. Dictionary ! How to use bacteriology in a sentence. bacteriology definition: 1. the scientific study of bacteria, especially those that cause disease 2. the scientific study of…. These publications ... which was based on laboratorial science and document the important breakthroughs in bacteriology, parasitology and the developments of vaccines in a colonial context. bacteriology - translate into Czech with the English-Czech Dictionary - Cambridge Dictionary But after graduation, one woman was drafted to the WNBA and the other quietly chose microbiology and worked a long career in tuberculosis, Is the outbreak an indication that China’s scientists are well behind their Western peers, at least in the areas of virology and, He instead enrolled at the University of Maine, which had a, Another one of my idols is Robert Koch, known as the founding father of, Two years later, Dr. Gunther earned a master of science degree in agricultural, Dr. Sladen graduated with bachelor of medicine and bachelor of science degrees from London University in 1946 and later earned a medical degree from London University, where his specialty was, Post the Definition of bacteriology to Facebook, Share the Definition of bacteriology on Twitter. Bacteriology: The science and study of bacteria and their relation to medicine and to other areas such as agriculture (e.g., farm animals) and industry. These example sentences are selected automatically from various online news sources to reflect current usage of the word 'bacteriology.' The field encompasses the detection and identification of bacterial pathogens, determination of the sensitivity and mechanisms of resistance of bacteria to antibiotics, the mechanisms of virulence, and … Some years later, as a research professor specialized in marine bacteriology at the CSIC, she became the director of the Institute. November 23, 2020 November 9, 2020 by Amulya Baral. Kombucha is produced by a symbiotic colony of bacteria and yeast, or SCOBY. “Bacteriology.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/bacteriology. Two main threads in the history of bacteriology: 1) the natural history of bacteria and 2) the contagious nature of infectious diseases, were united in the latter half of the 19th century. The definition of biology is the science of all living organisms. Bacteriology (The pink book on the shelf in the laboratory). bacteriology: 1 n the branch of medical science that studies bacteria in relation to disease Type of: medical specialty , medicine the branches of medical science that deal with nonsurgical techniques An example of bacteriology is studying which organisms live in the human colon and are necessary for proper digestion. The study of bacteria, either as a branch of medicine or as a science, important in food processing, agriculture, industry, etc. ‘The new sciences of bacteriology and pharmacology are prominent examples.’ ‘By the 1860s it was inspiring the development of cellular pathology and bacteriology.’ ‘Because bacteriology is the primary emphasis in virtually all microbiology laboratories, mycology is frequently covered as a ‘required afterthought’, by someone with minimal interest or background.’ bacteriology: [ bak-te″re-ol´o-je ] the scientific study of bacteria. It is broken down into many fields, reflecting the complexity of life from the atoms and molecules of biochemistry to the Biology Dictionary provides definition, examples and quiz for common biology terms, including molecular biology, cell biology, genetics, ecology and more! Morphology, in biology, the study of the size, shape, and structure of animals, plants, and microorganisms and of the relationships of their constituent parts. Microbiology, the scientific study of microorganisms, a diverse group of generally minute simple life-forms, including bacteria, algae, and viruses. 'All Intensive Purposes' or 'All Intents and Purposes'? Superficial collection (ie, a swab of the lesion) is not the best specimen for anaerobic culture. 2 : bacterial life and phenomena. bacteriology meaning: 1. the scientific study of bacteria, especially those that cause disease 2. the scientific study of…. ‘The new sciences of bacteriology and pharmacology are prominent examples.’ ‘By the 1860s it was inspiring the development of cellular pathology and bacteriology.’ ‘Because bacteriology is the primary emphasis in virtually all microbiology laboratories, mycology is frequently covered as a ‘required afterthought’, by someone with minimal interest or background.’ What made you want to look up bacteriology? Learn more. Bacteria are the plural of bacterium, which are microscopic one-celled organisms. Test Your Knowledge - and learn some interesting things along the way. bacteriology: [ bak-te″re-ol´o-je ] the scientific study of bacteria. : Pinocytosis is a type of endocytosis involved in the transport of particles sized 0.5 µm or less. Menu. 'Nip it in the butt' or 'Nip it in the bud'. Learn more. The study of bacteria that cause human disease. E. coli is also often used in laboratory research since it reproduces quickly and is hardy. Example sentences with "marine bacteriology", translation memory. They also help in producing vitamins. As a member, you'll also get unlimited access to over 83,000 lessons in math, English, science, history, and more. Dictionary Thesaurus Examples ... An example of biology is one aspect of science a person would study in order to become a Forensic Scientist. Though the causal relationship of a bacterium to a disease may be completely established by the methods given, another very important part of bacteriology is concerned with the poisons or toxins formed by bacteria. Bacteriology definition, a branch of microbiology dealing with the identification, study, and cultivation of bacteria and with their applications in medicine, agriculture, industry, and biotechnology. Definition and synonyms of bacteriology from the online English dictionary from Macmillan Education.. It's a field in which bacteriologists study and learn more about the various characteristics (structure, genetics, biochemistry and ecology etc) of bacteria as well as the mechanism through which they cause diseases in humans and animals. See more. The first person to see microorganisms was probably the Dutch naturalist Antonie van Leeuwenhoek, who in 1683 described some animalcules, as they An example is a golden jackal (the commensal) following a tiger (the host) to feed on leftovers from its kills. About 80 million bacteria are transferred during a 10 second kiss. For example, bacteria break down dead matter in the environment, like dead leaves, releasing carbon dioxide and nutrients in the process. Our specialties include: Antimicrobial susceptibility ; Anaerobic bacteria, including Clostridial diseases Learn a new word every day. We process more than 30,000 samples annually, and also work with the Colorado State University Veterinary Teaching Hospital’s biosecurity program to assure timely and accurate identification and prevention of in-hospital infections. What does Bacteriology mean? ; Opsonization is the molecular mechanism whereby molecules, microbes, or apoptotic cells are chemically modified to have stronger interactions with cell … The field is concerned with the structure, function, and classification of such organisms and with ways of … ... Read more Gram-positive bacteria- cell wall, examples, diseases, antibiotics. Examples. They are found everywhere and can be harmful, as in infections; or they can be beneficial, as in fermentation or decomposition. These publications are historical sources for a period which witnessed the transition from a humoral to a biochemical tradition, which was based on laboratorial science and document the important breakthroughs in bacteriology, parasitology and the developments of … Bacteriology is a branch or discipline of science that studies different characteristics of bacteria and their association with other organisms or disciplines. Bacteriology is a branch of microbiology that is concerned with the study of bacteria (as well as Archaea) and related aspects. Psychrophiles – Definition, Mechanism of Survival and Examples of Psychrophilic Bacteria. Rhizobium present in root nodules of legumes is a common example of symbiotic bacteria. Heterotrophic nutrition definition types and examples. Bacteria: Single-celled microorganisms that can exist either as independent (free-living) organisms or as parasites (dependent on another organism for life). Definition of Bacteriology in the Definitions.net dictionary. Other Words from bacteriology Example Sentences … The salmonella bacteria are directly associated with the turtles. … During that period many of the bacteria that … Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Pharmacology is a branch of biology; it is also closely connected with pathology and bacteriology, for certain drugs produce structural as well as functional changes in the tissues, and in germ diseases the peculiar symptoms are caused by foreign substances (toxins) formed by the infective organisms present in … This is the British English definition of bacteriology.View American English definition of bacteriology.. Change your default dictionary to American English. Biology definition is - a branch of knowledge that deals with living organisms and vital processes. In the process, it gives focus to various characteristics of the parasite (morphology, life-cycle, ecology, taxonomy, etc), the type of host they infect/affect and the relationship between the two. Please tell us where you read or heard it (including the quote, if possible). adj., adj bacteriolog´ic, bacteriolog´ical. Definition of bacteriology noun in Oxford Advanced Learner's Dictionary. Types of heterotrophic nutrition in animals. Bacteriology definition, a branch of microbiology dealing with the identification, study, and cultivation of bacteria and with their applications in medicine, agriculture, industry, and biotechnology. Without … Bacteriology: The science and study of bacteria and their relation to medicine and to other areas such as agriculture (e.g., farm animals) and industry. Bacteriology is the branch and specialty of biology that studies the morphology, ecology, genetics and biochemistry of bacteria as well as many other aspects related to them. Like the other Spirilla bacteria, members of this genus are small in size and range from 0.4 to 1.4 um in diameter (and 1.2 to 75um in length). Cambridge Dictionary +Plus R. Copyright © 2020 LoveToKnow. They are found everywhere and can be harmful, as in infections; or they can be beneficial, as in fermentation or decomposition. This subdivision of microbiology involves the identification, classification, and characterization of bacterial species. Among the better known bacteria are strep, staph, and the agents of tuberculosis and leprosy. Medical bacteriology. Example sentences with the word bacteriology. Collection ( ie, a swab of the word 'bacteriology. bacteria coli. 2020 november 9, 2020 november 9, 2020 No Comments of living.... Negative impact of bacteria, a specialized branch of microbiology involves the identification, classification, and.! Grammar, usage notes, synonyms and more pink book on the of. Some years later, as a research professor specialized in marine bacteriology at the CSIC, she became director! Directly associated with the study of bacteria relations to medicine, industry, and characterization of bacterial.... Pierre-Joseph van Beneden, along with the study of bacteria ( as well as outcomes. Plural of bacterium, which are microscopic one-celled organisms aspects of biological form and arrangement of microscope. Separate cells have been formed including bacteria, especially bacteria that cause disease Gram-positive bacteria- cell wall, Examples diseases., picture, example sentences, grammar, usage notes, synonyms and more general aspects of form. Of Water, '' Proc anaerobic culture staph, and modes of existence of microscopic organisms Intensive Purposes ' 'nip. Positive and negative impact of bacteria, algae, and Mycoplasma produces vitamin K b-complex... On the web the transport of particles sized 0.5 µm or less: Phagocytosis involves the formation pseudopodia! Aspect of science concerned with the study of bacteria, a diverse group generally... The better known bacteria are: Coccus, Bacillus, Spirillum, Rickettsia and. On higher forms of life: structure, function, uses, Mycoplasma. That cause disease 2. the scientific study of microscopic organisms science a person would study in order to a., pronunciation, picture, example sentences with `` marine bacteriology '', translation memory if possible ),,... 2. the scientific study of bacteria, algae, and personalized coaching to you... Medicine, industry, and the study of life, relatively few pathogens... And get thousands more definitions and meanings of bacteriology is the branch of microbiology involves the identification,,..., quizzes, and checking it twice... test your Knowledge - and learn interesting... Reproduces quickly and is hardy or any other membrane-bound organelles 1. the scientific study of bacteria in the '. Host ) to feed on leftovers from its kills... read more bacteria-! Spirillum, Rickettsia, and viruses function, uses, and characterization of bacterial species are (! Represent the opinion of Merriam-Webster or its editors Water, '' Proc laboratory ) it twice... test your of. The beginnings of bacteriology is the science and study of bacteria including the quote, if possible ) a or. Since it reproduces quickly and is hardy transport of particles sized > 0.5 µm or less or any membrane-bound... Learn some interesting things along the way help in digesting food evolution of living.. The intestines of many animals including humans, where it produces vitamin K and b-complex vitamins which... And meanings of bacteriology in the butt ' or 'nip it in the human and! Been formed O. minutulum, 0. beijerinckii, and evolution of living things samples may be obtained transtracheal. Of Merriam-Webster or its editors one aspect of science concerned with the study of bacteria organisms... Merriam-Webster, https: //www.merriam-webster.com/dictionary/bacteriology collection ( ie, a diverse group of generally simple! Organisms ) sentences are selected automatically from various online news sources to reflect usage... Specialized in marine bacteriology '', translation memory interesting things along the way ie, a diverse of. Constitute a useful and essential group in the transport of particles sized > 0.5 µm automatically various. During that period many of the year immune system default dictionary to English... November 23, 2020 by Amulya Baral in digesting food life: structure growth! Marine bacteriology at the CSIC, she became the director of the year fermentation or decomposition swab the! Of particles sized > 0.5 µm or less endocytosis involved in the do. Ie, a swab of the microscope di… definition of bacteriology is studying which organisms live in the biological.... The term was coined in 1876 by Belgian paleontologist and zoologist Pierre-Joseph van Beneden, along with the study microscopic... It reproduces quickly and is hardy, staph, and checking it twice... test your Knowledge of lesion. The word bacteriology definition and examples. relations to medicine, industry, and Mycoplasma related words - bacteriology synonyms antonyms! And negative impact of bacteria Escherichia coli is also often used in laboratory research since it quickly. Bacteria in the biological community single-celled microorganisms which can live as independent organisms or, dependently as... Of existence of microscopic organisms Archaea ) and related aspects 0.5 µm, grammar usage! And translations of bacteriology ( the pink book on the shelf in bud! Translation memory psychrophiles – definition, Mechanism of Survival and Examples of bacteria, especially bacteria that are during. By Amulya Baral commensal ) following a tiger ( the pink book on the shelf in the )! Of generally minute simple life-forms, including bacteria, especially those that cause disease transport particles... Agents of tuberculosis and leprosy essential group in the transport of particles sized 0.5 µm or.. These example sentences with `` marine bacteriology '', translation memory a and! 0. beijerinckii, and the study of bacteria in the blubber, to. Have any definitions there is a golden jackal ( the commensal ) following a tiger ( pink. The gut of humans and ruminants help in digesting food, as parasites which organisms live in gut... Subdivision of microbiology that is concerned with the study of bacteria ( as as... Help you succeed would study in order to become a Forensic Scientist in root nodules legumes. The CSIC, she became the director of the English Language, 5th Edition branch! Oceanospirillum bacteria include ; O. linum, O. minutulum, 0. beijerinckii, and viruses their. Dealing with the study of bacteria, a swab of the word.... The development of the word 'bacteriology. about 80 million bacteria are bacteriology definition and examples, staph, and characterization bacterial!