Public Health & Parasitic Diseases (Parasitology) (23).Notes on Genetic Engineering & Recombinant DNA Technology (18).Instrumentation in Microbiology Lab (26).Glossary & Definitions in Microbiology (1).Biochemical Tests in Microbiology Lab (19).Antimicrobial Susceptibility Testing (AST) & Antibiogram (21).Antimicrobial Agents & Antibiotics (24).Antibiotic Resistance / Antimicrobial Resistance (AMR) (23).McGraw-Hill Companies Inc., New York, USA. Dictionary of microbiology and molecular biology, 3 rd ed. Ryan K, Ray C.G, Ahmed N, Drew W.L and Plorde J (2010). Prescott L.M., Harley J.P and Klein D.A (2005). Madigan M.T., Martinko J.M., Dunlap P.V and Clark D.P (2009). Examples of spiral-shaped bacteria include: Vibrio cholerae that causes cholera disease, Treponema, Borrelia and Leptospira.īrooks G.F., Butel J.S and Morse S.A (2004). Spirilla contain one or more loosed turns while spirochetes contain many coils. They are known as spirilla (singular: Spirillum) if the cells are rigid and spirochetes if the cells are undulating and more flexible. Spiral-shaped bacteria can also be called Vibrio, and they are generally known to have shape that looks like a screw or a cork. Examples of spherical bacteria include: Streptococci, Staphylococci, and Neisseria. They can also be in chains (streptococcus) or in bulky form or clusters (staphylococcus). Cocci can appear as a single cell (coccus), double cell (diplococcus), or combined as four cells (tetracoccus or tetrad). They can also group themselves in various ways. Spherical bacteria (which can also be known as oval bacteria because they are not always perfect sphere) may be large or small.
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