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Volume 68, Issue 10

Lactobacillus porci sp. nov., isolated from small intestine of a swine Free

Abstract

A facultatively anaerobic, Gram-stain-positive, catalase-negative, rod-shaped lactic acid bacterium, designated SG816, was isolated from small intestine of a swine. Optimal growth occurred at 37 °C and pH 7.0. Furthermore, growth occurred in NaCl up to 0.5 % (w/v) but not at levels of salinity higher than 1 %. Comparative 16S rRNA gene sequencing and the matrix-associated laser desorption/ionization–time-of-flight mass spectometry profiling showed that strain SG816 was closely related to Lactobacillus delbrueckii subsp. bulgaricus KCTC 3635 (95.9 %) and Lactobacillus delbrueckii subsp. indicus JCM 15610 (95.9 %), followed by other Lactobacillus delbrueckii subspecies (95.9–95.7 %) and Lactobacillus equicursoris DSM 19284 (95.6 %). A comparison of two housekeeping genes, RNA polymerase alpha subunit (rpoA) and phenylalanyl-tRNA synthase alpha subunit (pheS), revealed that strain SG816 formed a separate branch within the clade of the genus Lactobacillus . The DNA G+C content level of the strain SG816 was 51.5 mol%. The strain was homofermentative and produced d-lactic acid from glucose fermentation. The major cellular fatty acids (>10 %) of the isolate were C18 : 1ω9c and C16 : 0. The peptidoglycan type was A4α l-Lys-d-Asp. On the basis of distinct phenotypic and phylogenetic properties, strain SG816 represents a novel species of the genus Lactobacillus , for which the name Lactobacillus porci sp. nov. is proposed. The type strain is SG816 (=KCTC 21090=NBRC 112917).

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Keyword(s): gastrointestinal tract , Lactobacillus porci sp. nov. , small intestine and swine
© 2018 IUMS
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2018-08-17
2024-04-20
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Lactobacillus porci sp. nov., isolated from small intestine of a swine
Int J Syst Evol Microbiol 68, 3118 (2018); https://doi.org/10.1099/ijsem.0.002949
/content/journal/ijsem/10.1099/ijsem.0.002949
/content/journal/ijsem/10.1099/ijsem.0.002949
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