(spaɪˈrɪləm ) noun Word forms: plural -la (-lə) 1. any bacterium having a curved or spirally twisted rodlike body. la (-rĭl′ə) 1. Related words - spirilla synonyms, antonyms, hypernyms and hyponyms. Spirillum, genus of spiral-shaped bacteria of the family Spirillaceae, aquatic except for one species (S. minus) that causes a type of rat-bite fever in man. Information about spirilla in the AudioEnglish.org dictionary, synonyms and antonyms. The spiral bacteria are spirilla (singular form is spirillus) and the rod-shaped bacteria are bacilli (singular form is bacillus). Unicellular, they often stick together forming clumps or filaments. CallUrl('biologydictionary>netwikipedia>orgsparknotes>comukessays>comphp',1), Many prokaryotes fall into three basic categories based on their shape: (a) cocci, or spherical; (b) bacilli, or rod-shaped; and (c) ~TildeLink(), or spiral-shaped. Spirillum definition, any of several spirally twisted, aerobic bacteria of the genus Spirillum, certain species of which are pathogenic for humans. [3] They comprise the phylum Spirochaetes. A spirillum (plural spirilla) is a rigid spiral bacterium that is Gram-negative and frequently has external amphitrichous or lophotrichous flagella. Spiral bacteria are twisted and commonly occur in two forms: spirillum (spirilla plural) and spirochetes. 2. Species S. minor is a cause of rat bite fever in humans. The Bacteria Called Spirilla. [3] Examples include: A spirochete (plural spirochetes) is a very thin, elongate, flexible, spiral bacteria that is motile via internal periplasmic flagella inside the outer membrane. Based on WordNet 3.0, Farlex clipart collection. Spirilla Bacteria. Read more about bacterial growth stages. General Methods of Classification 4. Contents: Definition of Bacteria Morphology of Bacteria General Methods of Classifying Bacteria Nutrition, Respiration and Reproduction in Bacterial Cell Staining of Bacteria … These minute living organisms cause serious waterborne diseases that may claim the lives of many. noun plural spirilla any of several spirally twisted, aerobic bacteria of the genus Spirillum, certain species of which are pathogenic for humans. Staining 6. © 2003-2012 Princeton University, Farlex Inc. Bacteria, germs, pathogens, microbes, viruses, and parasites are collectively known as microorganisms. New users enjoy 60% OFF. Spiral bacteria, bacteria of spiral (helical) shape, form the third major morphological category of prokaryotes along with the rod-shaped bacilli and round cocci. The two types of spiral cells are spirillum and spirochete, with spirillum being rigid with external flagella, and spirochetes being flexible with internal flagella.[3]. What is the process by which most bacteria cells divide?Answer: binary fission ... CallUrl('www>thoughtco>comcellsalive>comhtm',1), The size ranges from 10 to 100 micrometres long from looking at them on a microscopic level. What Are Examples of Spirilla Bacteria? [1][2] Spiral bacteria can be subclassified by the number of twists per cell, cell thickness, cell flexibility, and motility. These organisms are aerobic bacteria wound like helices. Morphology of Bacteria. Bacteria are single-celled microorganisms with prokaryotic cells, which are single cells that do not have organelles or a true nucleus and are less complex than eukaryotic cells. 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