Rhodococcus equi in the Soil Environment of Horses in Inner Mongolia, China

Takaı̈, Shinji; Ding, Zhuang; Huo, Xiao-wei; Madarame, Hiroo; MingHua, Gao; Tan, Zhong-tian; Gao, Shuang-cheng; Yan, Lei; Guo, Chun-mei; Zhou, Xuefeng; Hatori, Fumiko; Sasaki, Yukako; Kakuda, Tsutomu; Tsubaki, Shiro

doi:10.1292/jvms.68.739

Cited by 6 publications

(1 citation statement)

References 22 publications

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“…It is noticeable that none of these studies quantified the soil ingestion. Another problem linked to soil ingestion can be associated with the telluric bacterium Rhodoccus equii, which can affect foals health [31]. Even if the aerial route of exposure is responsible for the most severe pathology, such as pneumopathy, most foals probably acquire a subclinical infection via the alimentary route [32].…”

Section: Consequences On Healthmentioning

confidence: 99%

Ingestion of Soil by Grazing Sport Horses

Jurjanz

Collas

Quish

et al. 2021

Animals

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Data on soil ingestion in horses are lacking in contrast to other free-range animals. The importance of soil as a vector for environmental pollutants to food is less relevant in horses but several disorders secondary to soil ingestion, such as sand colic or enteritis have been reported. Therefore, soil ingestion has been studied on Irish sport horses grazing at three offered levels of daily herbage: 2, 3 and 4% of their body weight. Soil ingestion was estimated by the faecal recovery of a soil natural marker. Horses had 4.5, 4.1 and 3.7% of soil in their total intake respectively for the 2, 3 and 4% herbage offers. The 4% offer presented significantly less intake (543 g/d) compared to the more restricted offers (624 and 648 g respectively for 3 and 2%). The post-grazing sward height was significantly lower on the 2% offer (3.1 cm) compared to the higher offers (4.1 and 4.4 cm respectively for 3 and 4%). Thus, restricted herbage allowance made grazing closer to the ground and increased soil ingestion. The sward height appeared to be a reliable indicator to manage animal withdrawal from a pasture to limit soil ingestion and the risk of gastrointestinal pathologies caused by it.

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Section: Consequences On Healthmentioning

confidence: 99%

Ingestion of Soil by Grazing Sport Horses

Jurjanz

Collas

Quish

et al. 2021

Animals

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Rhodococcus

Jones

Goodfellow

2015

Bergey's Manual of Systematics of Archaea and Bacteria

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Rho.do.coc'cus. Gr. n. rhodon the rose; N.L. masc. n. coccus (from Gr. masc. n. kokkos grain, seed) coccus; N.L. masc. n. Rhodococcus a red coccus. Actinobacteria / Actinobacteria / Corynebacteriales / Nocardiaceae / Rhodococcus Aerobic, Gram‐stain‐positive to Gram‐stain‐variable, nonmotile actinomycetes that are usually partially acid–alcohol‐fast at some stage of the growth cycle. Rods to extensively branched substrate mycelium may be formed . In all strains the growth cycle begins with the coccus or short rod stage, with different organisms showing a succession of more or less complex morphological stages by which the completion of the cycle is achieved. Cocci may germinate into short rods, form filaments with side projections, show elementary branching, or, in the most differentiated forms, produce extensively branched hyphae. The next generation of cocci and short rods are formed by fragmentation of the rods, filaments, and hyphae. Some strains form sparse microscopically visible aerial hyphae, which may be branched, or aerial synnemata consisting of unbranched filaments that coalesce and project upwards. Colonies may be rough, smooth, or mucoid and pigmented buff, cream, orange, red, or yellow, although colorless variants occur. Chemo‐organotrophic with an oxidative type of metabolism. Catalase‐positive, arylsulfatase‐negative, and sensitive to lysozyme. Most strains grow well on standard media between 15 and 40°C, and use a wide range of organic compounds as sole sources of carbon for energy and growth. DNA G + C content ( mol %): 63–73 (HPLC, T m ). Type species : Rhodococcus rhodochrous (Zopf 1889) Tsukamura 1974, 43 VP .

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Phylum XXVI. Actinobacteria phyl. nov.

Goodfellow¹

2012

Bergey’s Manual® of Systematic Bacteriology

106

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Rhodococcus equi in the Soil Environment of Horses in Inner Mongolia, China

Cited by 6 publications

References 22 publications

Ingestion of Soil by Grazing Sport Horses

Ingestion of Soil by Grazing Sport Horses

Rhodococcus

Phylum XXVI. Actinobacteria phyl. nov.

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