Volume 13 Supplement 1

Challenges in malaria research: Core science and innovation

Open Access

The neuropathology of canine cerebral babesiosis compared to human cerebral malaria

  • Andrew Leisewitz1,
  • Gareth Turner2,
  • Sarah Clift3 and
  • Anne Pardini1
Malaria Journal201413(Suppl 1):P55

https://doi.org/10.1186/1475-2875-13-S1-P55

Published: 22 September 2014

Background

The favoured animal model of cerebral malaria is an artificial host-parasite combination caused by Plasmodium berghei in inbred mouse strains [1]. Canine babesiosis caused by natural infection in dogs with Babesia rossi causes cerebral disease in some cases [2]. This disease demonstrates both similarities and differences to human malarial and comparisons may be of value in elucidating the pathogenesis of this serious complication in both hosts [3].

Materials and methods

Post mortem brains collected from 50 natural cases of canine babesiosis showing clinical signs of cerebral involvement were collected and evaluated grossly and using light and electron microscopy.

Results

Grossly visible lesions (seen in 31/50) were classified as global (16/50) or regional (34/50). Global lesions were diffuse swelling and diffuse cerebral congestion or pallor. Multifocal petechial haemorrhages and white matter malacia appeared more regional. There were 18/50 cases that had a grossly appreciable oedema. Histological lesions appeared in a spectrum of severity, and included very localized endothelial injury. Babesia-parasitised red cell sequestration was a feature in some sections. Early lesions were multifocal and strictly associated with the microvasculature. Intermediate lesions were characterized by perivascular haemorrhage and some neutrophil infiltration. Advanced lesions were locally extensive and similar in appearance to haemorrhagic infarction. Ultrastructural evidence of cytoadherence between erythrocytes and capillary endothelium was demonstrated. Endothelial cell necrosis occurred early in the development of the lesions before neuronal and glial changes.

Conclusions

The endothelial injury, parasitized red cell packing and perivascular haemorrhage showed some similarities to the neuropathology of human CM. However the large haemorrhagic infarctions and clinical presentation with almost 100% mortality of dogs presenting with cerebral babesiosis were key differences.

Authors’ Affiliations

(1)
Department of Companion Animal Clinical Studies, Faculty of Veterinary Science, University of Pretoria
(2)
Mahidol Oxford Research Unit (MORU), Faculty of Tropical Medicine, Mahidol University
(3)
Department of Paraclinical Sciences, Faculty of Veterinary Science, University of Pretoria

References

  1. Craig AG, Grau GE, Janse C, Kazura JW, Milner D, Barnwell JW, Turner G, Langhorne J: The role of animal models for research on severe malaria. PLoS Pathog. 2012, 8: e1002401-10.1371/journal.ppat.1002401.PubMed CentralView ArticlePubMedGoogle Scholar
  2. Jacobson LS: The South African form of severe and complicated canine babesiosis: clinical advances 1994-2004. Vet Parasitol. 2006, 138: 126-139. 10.1016/j.vetpar.2006.01.047.View ArticlePubMedGoogle Scholar
  3. Aikawa M, Pongponratn E, Tegoshi T, Nakamura K, Nagatake T, Cochrane A, Ozaki LS: A study on the pathogenesis of human cerebral malaria and cerebral babesiosis. Mem Inst Oswaldo Cruz. 1992, 87 (Suppl 3): 297-301.View ArticlePubMedGoogle Scholar

Copyright

© Leisewitz et al; licensee BioMed Central Ltd. 2014

This article is published under license to BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

Comments

By submitting a comment you agree to abide by our Terms and Community Guidelines. If you find something abusive or that does not comply with our terms or guidelines please flag it as inappropriate.

Advertisement