Bacilli have a large surface area that helps them take in nutrients, but they may dry out easily. Species S. minor is a cause of rat bite fever in humans. Spirillum bacteria are thought to have been first described by van Leeuwenhoek in the 1670s and later by Muller. Genome Structure. A bacterial infection can be treated in a number of ways. Spirillum pulli (there are records of these bacteria causing diphtheritic stomatitis in chickens) Spirillum winogradskyi (was isolated from the sludge of a municipal waste water treatment) Spirillum pleomorphum. Spherical bacteria are known as cocci, rod-shaped bacteria are bacilli, and spiral-shaped bacteria are spirilla. Spirillum (plural Spirilla) is any bacterium that is shaped like a spiral. These organisms are aerobic bacteria wound like helices. chains of rod-shaped bacteria. spirilla. The term spirillum is used generally for any of the corkscrew like species. The coccus (plural form is cocci) bacteria are spherical and are usually found in clusters or chains. Spirilla have a spiral shape, a rigid cell wall, and motility mechanisms based on polar flagella. Other Shapes and Arrangements No Spirillum bacterial genomes have been sequenced or studied in extensive detail. It is one of the three shapes of bacteria. They are classified as spiral-shaped, aerobic, gram-negative bacteria with flagella (thread-like appendages that allow movement). Based on the shape, there are two main genera that belong to the spiral-shaped bacteria namely Spirilla and Spirochetes. Some bacteria can produce resistant forms, called spores, that make treatment difficult. The spiral bacteria are spirilla (singular form is spirillus) and the rod-shaped bacteria are bacilli (singular form is bacillus). arrangements of spiral. Bacteria are classified according to their shape, or morphology. Spirilla refers to a group of bacteria found in the family Spirillaceae. vibrio, spirillum, spirochete. It is a genus of spiral-shaped bacteria (Fig. They, too, have a flagellum but lack the endoflagella like in spirochetes. The other two are Coccus and Bacillus.It can be said as Spiral Bacteria. Examples: Campylobacter jejuni, Helicobacter pylori, Spirillum winogradskyi. coccobacilli. Cell Structure and Metabolism Spirillum is also the name of a genus of Gram-negative bacteria in the family Spirillaceae. Cocci… Spirilla is a plural form, which represents a large number of bacteria that possess a helical shape, whereas spirillum is a singular form, which represents a single bacterial cell. As far as treating infections from Spirilla is concerned, taking antibiotics belonging to the penicillin family, is recommended. These spirillum have spiral-shaped bodies and distinct bacterial cell shapes. Spirilla are found in aquatic environments rich in organic matter. spiral. However, they are more rigid and have the typical flagella found in other types of bacteria. vibrio. S. volutans is a large bacterium as well as an obligate microaerophile with a helical structure. 7.5) of the family Spirillaceae, aquatic except for one species (S. minus) that causes a type of rat-bite fever in humans.Spirillum is microbiologically characterized as a gram-negative, motile helical cell with tufts of whip like flagella at each end. Bacteria are further classified on the basis of their shape, nutritional patterns, and metabolic characteristics. Spirilla (Helical-shaped/Corkscrew form) These bacteria are similar in structure with spirochetes but are more rigid. Spirillum bacteria include gram-negative bacteria that come in two species: Spirillum volutans and Spirillum winogradskyi. 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