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Detection of a novel haemoplasma species in fattening pigs with skin alterations, fever and anaemia
  1. Julia Stadler1,
  2. Julia Ade2,
  3. Mathias Ritzmann1,
  4. Katharina Hoelzle2 and
  5. Ludwig E Hoelzle2
  1. 1Clinic for Swine, Centre for Clinical Veterinary Medicine, Ludwig-Maximilians-University Munich, Oberschleissheim, Bavaria, Germany
  2. 2Institute of Animal Science, Institute of Environmental and Animal Hygiene and Veterinary Medicine, University of Hohenheim Faculty of Agricultural Sciences, Stuttgart, Baden-Wuerttemberg, Germany
  1. Correspondence to Dr Julia Stadler, Clinic for Swine, Ludwig-Maximilians-Universitat Munchen Tierarztliche Fakultat, Munchen, Bayern, Germany; J.Stadler{at}


Background In a fattening farm in Southern Germany, skin alterations (urticaria, haemorrhagic diathesis) and high fever were observed in 30% of the pigs 2 weeks after arrival. Feed intake was severely compromised in affected pigs.

Methods After detailed clinical observation, blood samples from affected pigs were collected for haematological, PCR and serological investigations. In addition, pathological investigations were performed on one pig.

Results and conclusion Analysis of blood parameters revealed a normocytic, normochromic anaemia. A novel porcine haemoplasma species was detected in blood samples of affected pigs and spleen sample of the necropsied pig by PCR. Phylogenetic analyses based on the 16S rDNA showed 99% identity to a novel porcine haemoplasma (‘Candidatus (Ca.) M. haemosuis’) species which has recently been described in China. Interestingly, this is the first report of ‘Ca. M. haemosuis’ in pigs with clinical signs resembling those of Mycoplasma (M) suis and the first description of this novel haemoplasma species outside Asia. On-farm affected pigs were treated with oxytetracycline and non-steroidal anti-inflammatory drugs. Clinical signs improved after implementation of treatment and optimisation of management procedures. This case might indicate that other porcine haemoplasma species than M suis can induce fever and skin alterations and may have an economic impact on affected farms.

  • skin alterations
  • high fever
  • normocyctic
  • normochromic anaemia
  • haemotrophic mycoplasma
  • Candidatus M.haemosuis
  • case report
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  • Funding The authors have not declared a specific grant for this research from any funding agency in the public, commercial or not-for-profit sectors.

  • Competing interests None declared.

  • Patient consent for publication Not required.

  • Provenance and peer review Not commissioned; externally peer reviewed.

  • Data availability statement All data relevant to the study are included in the article or uploaded as online supplementary information.

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