The Genus Micrococcus

Kocur, M.; Kloos, Wesley E.; Schleifer, Karl‐Heinz

doi:10.1007/0-387-30743-5_37

Cited by 58 publications

(48 citation statements)

References 94 publications

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“…1, 2, and 4; see also Tables S1 and S2 in the supplemental material). Many Actinobacteria reduce nitrate, but very few known actinobacterial species are capable of denitrification (21,25,38,62). Thus, Actinobacteria likely compete with gammaproteobacterial denitrifiers for nitrate in the earthworm gut and might thereby affect in vivo emission of nitrogenous gases.…”

Section: Discussionmentioning

confidence: 99%

Effect of Earthworm Feeding Guilds on Ingested Dissimilatory Nitrate Reducers and Denitrifiers in the Alimentary Canal of the Earthworm

Depkat-Jakob

Hilgarth

Horn

et al. 2010

Appl Environ Microbiol

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The earthworm gut is an anoxic nitrous oxide (N 2 O)-emitting microzone in aerated soils. In situ conditions of the gut might stimulate ingested nitrate-reducing soil bacteria linked to this emission. The objective of this study was to determine if dissimilatory nitrate reducers and denitrifiers in the alimentary canal were affected by feeding guilds (epigeic [Lumbricus rubellus], anecic [Lumbricus terrestris], and endogeic [Aporrectodea caliginosa]). Genes and gene transcripts of narG (encodes a subunit of nitrate reductase and targets both dissimilatory nitrate reducers and denitrifiers) and nosZ (encodes a subunit of N 2 O reductase and targets denitrifiers) were detected in guts and soils. Gut-derived sequences were similar to those of cultured and uncultured soil bacteria and to soil-derived sequences obtained in this study. Gut-derived narG sequences and narG terminal restriction fragments (TRFs) were affiliated mainly with Gram-positive organisms (Actinobacteria). The majority of gut-and uppermost-soil-derived narG transcripts were affiliated with Mycobacterium (Actinobacteria). In contrast, narG sequences indicative of Gram-negative organisms (Proteobacteria) were dominant in mineral soil. Most nosZ sequences and nosZ TRFs were affiliated with Bradyrhizobium (Alphaproteobacteria) and uncultured soil bacteria. TRF profiles indicated that nosZ transcripts were more affected by earthworm feeding guilds than were nosZ genes, whereas narG transcripts were less affected by earthworm feeding guilds than were narG genes. narG and nosZ transcripts were different and less diverse in the earthworm gut than in mineral soil. The collective results indicate that dissimilatory nitrate reducers and denitrifiers in the earthworm gut are soil derived and that ingested narG-and nosZ-containing taxa were not uniformly stimulated in the guts of worms from different feeding guilds.

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Section: Discussionmentioning

confidence: 99%

Effect of Earthworm Feeding Guilds on Ingested Dissimilatory Nitrate Reducers and Denitrifiers in the Alimentary Canal of the Earthworm

Depkat-Jakob

Hilgarth

Horn

et al. 2010

Appl Environ Microbiol

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“…These aerobic bacteria have frequently been isolated from human (Kocur et al, 2006) and animal (Chin and Watts, 1992; Kloos et al, 1998) skin and might be considered part of the normal microflora of the skin in both human and animal hosts. Corynebacterium is a non-motile, facultative anaerobic bacterium widely distributed in nature.…”

Section: Comparison Of the Microbial Communities And Taxonomic Classimentioning

confidence: 99%

Ovine pedomics: the first study of the ovine foot 16S rRNA-based microbiome

et al. 2011

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We report the first study of the bacterial microbiome of ovine interdigital skin based on 16S rRNA by pyrosequencing and conventional cloning with Sanger-sequencing. Three flocks were selected, one a flock with no signs of footrot or interdigital dermatitis, a second flock with interdigital dermatitis alone and a third flock with both interdigital dermatitis and footrot. The sheep were classified as having either healthy interdigital skin (H) and interdigital dermatitis (ID) or virulent footrot (VFR). The ovine interdigital skin bacterial community varied significantly by flock and clinical condition. The diversity and richness of operational taxonomic units was greater in tissue from sheep with ID than H or VFR-affected sheep. Actinobacteria, Bacteriodetes, Firmicutes and Proteobacteria were the most abundant phyla comprising 25 genera. Peptostreptococcus, Corynebacterium and Staphylococcus were associated with H, ID and VFR, respectively. Sequences of Dichelobacter nodosus, the causal agent of ovine footrot, were not amplified because of mismatches in the 16S rRNA universal forward primer (27F). A specific real-time PCR assay was used to demonstrate the presence of D. nodosus, which was detected in all samples including the flock with no signs of ID or VFR. Sheep with ID had significantly higher numbers of D. nodosus (10 4 -10 9 cells per g tissue) than those with H or VFR feet.

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“…ha sido relacionada con enfermedades respiratorias (9). Por otro lado, el género Micrococcus hace parte de la microflora cutánea que ha sido aislado del aire y del suelo (20). Así mismo, los géneros Streptococcus y Corynebacterium hacen parte de la flora normal de la piel (21).…”

Section: Discussionunclassified

Determinación de la calidad bacteriológica del aire en un laboratorio de microbiología en la Universidad Distrital Francisco José de Caldas en Bogotá, Colombia

Bohórquez

Alvarado

Peñaloza

2016

nova

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Determinar las bacterias del aire de un laboratorio de ensenanza de microbiología de la Universidad Distrital y así establecer la posibilidad de riesgo para la salud a la exponen los usuarios por la presencia de estos microorganismos. Métodos. Se tomaron muestras de aire por la técnica de sedimentación, se realizaron recuentos, y caracterización macroscópica y microscópica de las colonias. Después de aislamientos selectivos se llevó a cabo identificación por BD BBL Crystal. Resultados. Se obtuvo mayor recuento de bacterias Gram positivas que de Gram negativas. Se encontraron bacterias de los géneros Micrococcus, Staphylococcus, Leuconostoc, Bacillus, Corynebacterium, Pseudomonas, Yersinia, Serratia, Shigella, Klebsiella, Citrobacter y Acinetobacter. Los resultados mostraron que las bacterias identificadas no suponen riesgo elevado para la salud de los usuarios sanos, pero que es necesario implementar medidas para disminuir la carga bacteriana y disminuir posibles afecciones generales en la salud de sus ocupantes.

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The Genus Micrococcus

Cited by 58 publications

References 94 publications

Effect of Earthworm Feeding Guilds on Ingested Dissimilatory Nitrate Reducers and Denitrifiers in the Alimentary Canal of the Earthworm

Effect of Earthworm Feeding Guilds on Ingested Dissimilatory Nitrate Reducers and Denitrifiers in the Alimentary Canal of the Earthworm

Ovine pedomics: the first study of the ovine foot 16S rRNA-based microbiome

Determinación de la calidad bacteriológica del aire en un laboratorio de microbiología en la Universidad Distrital Francisco José de Caldas en Bogotá, Colombia

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