Diversity and frequency of Nocardia spp. in the soil of Isfahan province, Iran

Kachuei, Reza; Emami, M.; Mirnejad, Reza; Khoobdel, Mehdi

doi:10.1016/s2221-1691(12)60079-3

Cited by 11 publications

(25 citation statements)

References 36 publications

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“…This is much higher than what has been reported in either Peleg et al or Coussement et al The incidence of Nocardia in SOT patients was reported as 0.6% in Peleg et al On personal request, Coussement et al reported the incidence at one of their centers to be 0.13% in kidney transplant patients and 1.2% in heart transplant patients. The differences between the incidence of nocardiosis in these studies and at our center could be due to the environmental influences reported by Kachuei and Stapleton . Studies of the relationship between ecology and climatology and nocardiosis would be helpful in determining whether or not environmental factors in the southwestern US influence the development of nocardiosis.…”

Section: Discussionmentioning

confidence: 65%

“…In a study on microbial keratitis by Stapleton et al , Nocardia was found exclusively in temperate climates . Kachuei et al studied diversity and frequency of different species of Nocardia in relation to environmental factors including soil pH in the Isfahan province of Iran. They had a similar observation to Stapleton et al's: most Nocardia species were found in semi‐desert, temperate climates …”

Section: Introductionmentioning

confidence: 99%

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A 20‐year experience with nocardiosis in solid organ transplant (SOT) recipients in the Southwestern United States: A single‐center study

Majeed

Beatty

Ahmad

et al. 2018

Transplant Infectious Dis

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Based on our findings, daily 1 DS TMP/SMX prophylaxis did not appear to provide reliable protection against nocardiosis. However, we could not state definitely that TMP/SMX prophylaxis was or wasn't protective because of lack control group. None of the Fisher's exact tests revealed associations between the tested risk factors and either disease dissemination or mortality. This could be due to a true lack of association between the variables in each pair. However, it is also likely that our relatively small sample size limited our power to detect underlying relationships that may be present. Compared with other studies, 1-year mortality was lower at our institution (11% vs 16%).

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Section: Discussionmentioning

confidence: 65%

Section: Introductionmentioning

confidence: 99%

A 20‐year experience with nocardiosis in solid organ transplant (SOT) recipients in the Southwestern United States: A single‐center study

Majeed

Beatty

Ahmad

et al. 2018

Transplant Infectious Dis

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“…Climate, vegetation type, and soil pH probably affect the frequency and diversity of soil aerobic Actinobacteria [ 55 ]. Those that cause human infections in any given area are typically those found in the local soil [ 56 ].…”

Section: Discussionmentioning

confidence: 99%

Molecular Characterization and Antimicrobial Susceptibilities of Nocardia Species Isolated from the Soil; A Comparison with Species Isolated from Humans

et al. 2020

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Nocardia species, one of the most predominant Actinobacteria of the soil microbiota, cause infection in humans following traumatic inoculation or inhalation. The identification, typing, phylogenetic relationship and antimicrobial susceptibilities of 38 soil Nocardia strains from Lara State, Venezuela, were studied by 16S rRNA and gyrB (subunit B of topoisomerase II) genes, multilocus sequence analysis (MLSA), whole-genome sequencing (WGS), and microdilution. The results were compared with those for human strains. Just seven Nocardia species with one or two strains each, except for Nocardia cyriacigeorgica with 29, were identified. MLSA confirmed the species assignments made by 16S rRNA and gyrB analyses (89.5% and 71.0% respectively), and grouped each soil strain with its corresponding reference and clinical strains, except for 19 N. cyriacigeorgica strains found at five locations which grouped into a soil-only cluster. The soil strains of N. cyriacigeorgica showed fewer gyrB haplotypes than the examined human strains (13 vs. 17) but did show a larger number of gyrB SNPs (212 vs. 77). Their susceptibilities to antimicrobials were similar except for beta-lactams, fluoroquinolones, minocycline, and clarithromycin, with the soil strains more susceptible to the first three (p ≤ 0.05). WGS was performed on four strains belonging to the soil-only cluster and on two outside it, and the results compared with public N. cyriacigeorgica genomes. The average nucleotide/amino acid identity, in silico genome-to-genome hybridization similarity, and the difference in the genomic GC content, suggest that some strains of the soil-only cluster may belong to a novel subspecies or even a new species (proposed name Nocardia venezuelensis).

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“…En ese estudio se detectó a N. brasiliensis como actinomiceto predominante (20.8%), seguido de N. asteroides (8.3%), N. otitidis-caviarum (6.2%), A. madurae (2.8%), S. somaliensis (1.1%) y A. pelletieri (0.8%) (Castañón-Olivares et al, 1992). Estudios en otras partes del mundo han sido enfocados al aislamiento de actinomicetos de importancia médica (Reza, 2009;Kachuei, 2012).…”

Section: Resultados Y Discusiónunclassified

Presencia de agentes potenciales causantes de infecciones subcutáneas humanas en suelo y plantas en el estado de Puebla, México

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Hernández

et al. 2017

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Diversity and frequency of Nocardia spp. in the soil of Isfahan province, Iran

Cited by 11 publications

References 36 publications

A 20‐year experience with nocardiosis in solid organ transplant (SOT) recipients in the Southwestern United States: A single‐center study

A 20‐year experience with nocardiosis in solid organ transplant (SOT) recipients in the Southwestern United States: A single‐center study

Molecular Characterization and Antimicrobial Susceptibilities of Nocardia Species Isolated from the Soil; A Comparison with Species Isolated from Humans

Presencia de agentes potenciales causantes de infecciones subcutáneas humanas en suelo y plantas en el estado de Puebla, México

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