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Chapter 52 : Algorithms for Identification of Curved and Spiral-Shaped Gram-Negative Rods

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Algorithms for Identification of Curved and Spiral-Shaped Gram-Negative Rods, Page 1 of 2

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Abstract:

This chapter mainly focuses on algorithms used for identification of curved and spiral-Shaped Gram-negative rods. Curved and spiral-shaped bacteria have a common microscopic morphology but represent diverse bacterial pathogens. and are two important species isolated from fecal specimens. is the most common curved gram-negative rod isolated from gastric tissue, but other species have also been reported in this site. Other less commonly isolated curved gram-negative rods include the anaerobes spp., , , and , which may be isolated from blood, abscess material, or other clinical samples. The spp. and spp. cause systemic infections and are infrequently isolated in clinical laboratories, usually only with specialized media. spp. of clinical importance are diagnosed based on clinical and epidemiologic findings, as well as microscopic, serologic, and molecular test procedures. Various details about curved gram-negative bacilli that may be encountered in clinical specimens are described in the chapter.

Citation: Nachamkin I. 2011. Algorithms for Identification of Curved and Spiral-Shaped Gram-Negative Rods, p 881-884. In Versalovic J, Carroll K, Funke G, Jorgensen J, Landry M, Warnock D (ed), Manual of Clinical Microbiology, 10th Edition. ASM Press, Washington, DC. doi: 10.1128/9781555816728.ch52

Key Concept Ranking

Gram-Negative Bacilli
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Helicobacter cinaedi
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Helicobacter pylori
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Helicobacter cinaedi
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Helicobacter pylori
0.96428573
Helicobacter cinaedi
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Helicobacter pylori
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Helicobacter
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Figures

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FIGURE 1

Algorithm for identification of curved gram-negative bacilli from fecal samples. Abbreviations: BAP, sheep blood agar plate; TCBS, thiosulfate-citrate-bile salts-sucrose agar.

Citation: Nachamkin I. 2011. Algorithms for Identification of Curved and Spiral-Shaped Gram-Negative Rods, p 881-884. In Versalovic J, Carroll K, Funke G, Jorgensen J, Landry M, Warnock D (ed), Manual of Clinical Microbiology, 10th Edition. ASM Press, Washington, DC. doi: 10.1128/9781555816728.ch52
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Tables

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TABLE 1

Curved gram-negative bacilli that may be encountered in clinical specimens

BC, blood culture; GNR, gram-negative rod; DFA, direct fluorescent antibody assay; Campy CVA, Campy-cefoperazone, vancomycin, amphotericin; CCDA, charcoal-cefoperazone-deoxycholate agar; TCBS, thiosulfate-citrate-bile salts-sucrose agar; BSK, Barbour-Stoenner-Kelly medium; MKP, modified Kelley's medium; EMJH, Ellinghausen-McCullough-Johnson-Harris medium; PLM-5, prepared leptospira medium.

Not all species listed in this category have been shown to cause human diseases; they are listed if they have been isolated from human clinical specimens.

Citation: Nachamkin I. 2011. Algorithms for Identification of Curved and Spiral-Shaped Gram-Negative Rods, p 881-884. In Versalovic J, Carroll K, Funke G, Jorgensen J, Landry M, Warnock D (ed), Manual of Clinical Microbiology, 10th Edition. ASM Press, Washington, DC. doi: 10.1128/9781555816728.ch52

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