Abstract
Differentiation between viable and non-viable hookworm ova in environmental samples is necessary in order to implement strategies to mitigate re-infections in endemic regions. In this study, an untargeted metabolic profiling method was developed that utilised gas chromatography-mass spectrometry (GC-MS) in order to investigate hookworm ova viability. Ancylostoma caninum was used to investigate the metabolites within viable and non-viable ova. Univariate and multivariate statistical analyses of the data resulted in the identification of 53 significant metabolites across all hookworm ova samples. The major compounds observed in viable and non-viable hookworm ova were tetradecanoic acid, commonly known as myristic acid [fold change (FC) = 0.4], and dodecanoic acid, commonly known as lauric acid (FC = 0.388). Additionally, the viable ova had self-protecting metabolites such as prostaglandins, a typical feature absent in non-viable ova. The results of this study demonstrate that metabolic profiling using GC-MS methods can be used to determine the viability of canine hookworm ova. Further studies are needed to assess the applicability of metabolic profiling using GC-MS to detect viable hookworm ova in the mixed (viable and non-viable) populations from environmental samples and identify the metabolites specific to human hookworm species.
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The authors would like to appreciate financial support from the Water Corporation, WA and Land and Water, Commonwealth Scientific and Industry Research Organisation (CSIRO). Thanks to Dr. Simon Toze for his guidance.
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Gyawali, P., Beale, D.J., Ahmed, W. et al. Determination of Ancylostoma caninum ova viability using metabolic profiling. Parasitol Res 115, 3485–3492 (2016). https://doi.org/10.1007/s00436-016-5112-4
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DOI: https://doi.org/10.1007/s00436-016-5112-4