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Angiostrongylus cantonensis: An optimized cultivation of this parasitic nematode under laboratory conditions

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Abstract

Angiostrongylus cantonensis (A. cantonensis), a parasitic nematode, is the important neurotropic pathogen which causes human angiostrongyliasis. It has a complex life-cycle and severe parasite-host interaction in contrast to free-living nematode. Establishment of a well-suited life-cycle and in vitro cultivation of A. cantonensis in the laboratory will be one of the key techniques to elucidate the mechanism of parasite-host interaction. However, the low survival and growth rate of worms is still to be the problem. We optimized the known life-cycle of A. cantonensis in the laboratory, showing that small in size, easy to breed, and high compatibility of Biomphalaria straminea precede the common snails as an intermediate host of A. cantonensis. Furthermore, the egg hatching rate in Ham’s F-12 medium reached approximately 80% using the eggs of mature female adult worms. We also demonstrated that the survival of larvae could be sustained for more than 30 days by in vitro cultivation of L1 larvae in DMEM with mixed antibiotics (100 units/mL of penicillin G potassium, 50 μg/mL of streptomycin sulfate, and 0.5 μg/mL of amphotericin B) and L3, L4, and L5 larvae in Waymouth’s medium with 20% fetal calf serum and mixed antibiotics. Infective L1 and L3 larvae kept high infective rate to the snail and rat after cultivation in these media, respectively. It will provide the basis for studying on genetic manipulations for functional genes, new drug screening, and the mechanism of parasite-host interaction of parasitic nematodes.

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Abbreviations

A. cantonensis :

Angiostrongylus cantonensis

A. costaricensis :

Angiostrongylus costaricensis

A. fulica :

Achatina fulica

C. elegans :

Caenorhabditis elegans

C. hamulosa :

Cheilospirura hamulosa

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Acknowledgement

This work was supported by the National Key Research and Development Plan of China (2016YFC1200500 and 2016YFC1202003), the National Natural Science Foundation of China (81401686), and the PhD Start-up Fund of the Natural Science Foundation of Guangdong Province, China (2015A030310058).

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Correspondence to Dongjuan Yuan or Zhongdao Wu.

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All procedures of the animals were carried out according to the guidelines of the Association for Assessment and Accreditation of Laboratory Animal Care International. Our protocols followed institutional ethical guidelines that were approved by the Ethics Committee of ZSSOM on Laboratory Animal Care (SYSU, ZSSOM; Permit No: 2016-122).

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Xie, H., Yuan, D., Luo, S. et al. Angiostrongylus cantonensis: An optimized cultivation of this parasitic nematode under laboratory conditions. Parasitol Res 116, 2231–2237 (2017). https://doi.org/10.1007/s00436-017-5526-7

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  • DOI: https://doi.org/10.1007/s00436-017-5526-7

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