Eperythrozoon parvum a Filterable Blood Parasite of Swine

Splitter, Earl J.

doi:10.1038/172040a0

Cited by 5 publications

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“…There have only been two hemoplasma species, M. suis and E. parvum, recognized in swine [18], that have been distinguished by morphology and pathogenecity [17,19]. In the present study, we demonstrated two genetic clusters among swine hemoplasmas.…”

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confidence: 59%

Two Genetic Clusters in Swine Hemoplasmas Revealed by Analyses of the 16S rRNA and RNase P RNA Genes

Watanabe

Fujihara

Obara

et al. 2011

The Journal of Veterinary Medical Science

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ABSTRACT. Only two hemoplasma species, Eperythrozoon parvum and Mycoplasma suis, have been recognized in pigs. Here we demonstrate the genetic variations among six hemoplasma strains detected from pigs, by analyzing the 16S rRNA and RNase P RNA (rnpB) genes, and propose a novel hemoplasma taxon that has not been described previously. Phylogenetic trees based on the nucleotide sequence of the 16S rRNA gene indicated that these six hemoplasmas were divided into two clusters representing M. suis and a novel taxon. We further examined the primary and secondary structures of the nucleotide sequences of the rnpB gene of the novel taxon, and found it distinct from that of M. suis. In conclusion, we unveiled a genetic cluster distinct from M. suis, suggesting a new swine hemoplasma species or E. parvum. Our findings also suggest that this novel cluster should be included in the genus Mycoplasma.

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confidence: 59%

Two Genetic Clusters in Swine Hemoplasmas Revealed by Analyses of the 16S rRNA and RNase P RNA Genes

Watanabe

Fujihara

Obara

et al. 2011

The Journal of Veterinary Medical Science

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“…In pigs, the two HM species Mycoplasma suis and Mycoplasma parvum were first described in the first half of the last century [ 6 ]. While M. parvum seems to be an apathogenic HM species, M. suis is the causative agent of infectious anaemia in pigs (IAP) [ 4 , 7 , 8 ]. Acute M. suis infections are characterised by haemolytic anaemia, high fever, icterus, hypoglycaemia, intravascular coagulopathy, and endothelial damages [ 4 , 6 , 9 , 10 ].…”

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confidence: 99%

Occurrence of ‘Candidatus Mycoplasma haemosuis’ in fattening pigs, sows and piglets in Germany using a novel gap-based quantitative real-time PCR assay

et al. 2022

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Background The appearance of the novel porcine haemotrophic mycoplasma (HM) species ‘Candidatus Mycoplasma haemosuis’ was reported in apparently healthy but also in clinically sick animals in China, Korea and in a case report from Germany. Outside of Asia, however, nothing further is known about the frequency of ‘Ca. M. haemosuis’ in pigs to date. To investigate the distribution of this novel HM species in Germany, fattening pigs, sows and pre-suckling piglets were examined using a herein developed quantitative real-time PCR assay (qPCR). Because the piglets were sampled before the first colostrum uptake, additional information on a possible vertical transmission from dams to their offspring was obtained. Results Our novel qPCR assay successfully detected ‘Ca. M. haemosuis’ in all blood samples from the ‘Ca. M. haemosuis’-infected pigs. No cross-reactivity was detected when DNA from non-target Mycoplasma spp. and other bacterial species representing 105 bacteria/reaction were used as a template. The lower limit of detection of the qPCR was thus 10 gap gene copies per reaction and 2.5 x 103 genome equivalents (GE) per mL blood. ‘Candidatus M. haemosuis’ was detected by this qPCR in blood samples from a total out of 6.25% sows (13/208), 4.50% pre-suckling piglets (28/622) and 17.50% fattening pigs (35/200). On farm level, 3 out of 21 piglet producing farms (14.28%) and 9 out of 20 fattening farms (45.00%) were positive for ‘Ca. M. haemosuis’. Co-infections with M. suis were evident in all age groups. Conclusion ‘Candidatus M. haemosuis’ infection is present in German pig farms and the detection of the novel porcine HM species in piglets immediately after birth before colostrum intake indicates vertical transmission. The novel qPCR assay specific for ‘Ca. M. haemosuis’ described herein will be a prerequisite for future studies on the prevalence, epidemiology as well as the clinical and economic impact of ‘Ca. M. haemosuis’ infections.

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Krankheiten durch Bartonellaceae

Wigand¹

1966

Erzeugung Von Krankheitszuständen Durch Das Experiment

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Eperythrozoon parvum a Filterable Blood Parasite of Swine

Cited by 5 publications

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Two Genetic Clusters in Swine Hemoplasmas Revealed by Analyses of the 16S rRNA and RNase P RNA Genes

Two Genetic Clusters in Swine Hemoplasmas Revealed by Analyses of the 16S rRNA and RNase P RNA Genes

Occurrence of ‘Candidatus Mycoplasma haemosuis’ in fattening pigs, sows and piglets in Germany using a novel gap-based quantitative real-time PCR assay

Krankheiten durch Bartonellaceae

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