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Identification of Schistosoma haematobium, S. bovis and S. curassoni by multivariate analysis of cercarial papillae indices |
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| Authors: | Ch Bayssade-Dufour J Cabaret L D Ngendahayo J -L Albaret C Carrat and A G Chabaud |
| Institution: | * Laboratoire de Zoologie des Vers, associé au CNRS, Muséum National d'Histoire Naturelle, 61 rue de Buffon, 75231, Paris Cedex 05, France † Station de Pathologie Aviaire et de Parasitologie, Unité d'Ecologie Parasitaire, INRA, 37380, Monnaie, France ‡ Station de Virologie et Immunologie, Centre de Recherches de Jouy-en-Josas, INRA, Domaine de Vilvert, 78350, Jouy-en-Josas, France |
| Abstract: | The disposition of cercarial papillae of 68 pre-identified Schistosoma species was established. All the cercariae originated from Africa and Madagascar and were either obtained from natural or experimental infections, and belonged to three species Schistosoma haematobium, S. bovis and S. curassoni. Discriminant analysis was based on nine characters: average values, skewness and kurtosis of three cercarial indices (AD, AL and U) for each sample or isolate. AD, AL correspond respectively to the relative distance between dorsal and lateral papillae. U corresponds to the total number of tail stem papillae. With the exception of two cases of the 68 (one of them corresponding to cercariae shed by a non-African experimentally infected snail), the method enabled discrimination of S. haematobium, S. bovis and S. curassoni. |
| Keywords: | Schistosoma haematobium Schistosoma bovis Schislosoma curassoni cercariae chaetotaxy cercarial indices Bulinus Africa Madagascar man cattle sheep rodents |
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