Detection of European Trichobilharzia schistosomes ( T. franki , T. szidati , and T. regenti ) based on novel genome sequences.
The most frequent causative agents of cercarial dermatitis in Europe are the avian schistosomes of the genus Trichobilharzia . They preferably parasitize birds of the Anatidae. Trichobilharzia spp. schistosomes are also able to penetrate mammalian skin, posing a health risk to mammals, including humans. Currently several loci from nuclear and mitochondrial genomes are determined for European species of Trichobilharzia . Among them there is 1 genome sequence, ToSau3A, which is suitable for detection of Trichobilharzia spp. infection in aquatic systems. In the present paper, we used a PCR assay to obtain novel genome sequences from cercariae isolates of 3 European bird schistosome species ( Trichobilharzia franki , Trichobilharzia szidati , and Trichobilharzia regenti ) collected from freshwater ponds in Belorussia and Russia. We applied RAPD-fingerprinting using 1 random primer to differentiate 3 trichobilharzian species and subsequently cloned and sequenced putative species-specific RAPD fragments. One of them (410 bp in length), which was obtained for T. franki , revealed 64% homology with the repeat region of Schistosoma mansoni (GenBank FN357352) and turned out to be suitable for designing a specific primer pair (TR98F and TR98R) to detect 7 novel DNA sequences in the genome of 3 European Trichobilharzia species. The newly designed primer pair was found to be potentially suitable for PCR-based detection of trichobilharzian infection in snails. PCR primers TR98F and TR98R amplified only the DNA isolated from cercariae and sporocysts of 3 trichobilharzian species, but neither the DNA of 3 other digenean species ( Bilharziella polonica , Apatemon sp., and Diplostomum sp.) nor the DNA of uninfected host snails ( Lymnaea stagnalis , Radix auricularia , and Radix ovata ).
Korsunenko
A V
AV
Institute of Gene Biology Russian Academy of Sciences, Vavilov Str. 34/5, Moscow, Russia 119334. korsanna@mail.ru
Chrisanfova
G G
GG
Ryskov
A P
AP
Movsessian
S O
SO
Vasilyev
V A
VA
Semyenova
S K
SK
D000818:Animals; D001483:Base Sequence; D001715:Bird Diseases / Q000175:diagnosis / Q000469:parasitology*; D001717:Birds; D016172:DNA Fingerprinting / Q000662:veterinary; D018509:DNA, Helminth / Q000032:analysis* / Q000737:chemistry; D004275:DNA, Ribosomal / Q000032:analysis / Q000737:chemistry; D005618:Fresh Water / Q000469:parasitology*; D008969:Molecular Sequence Data; D016133:Polymerase Chain Reaction / Q000662:veterinary; D019105:Random Amplified Polymorphic DNA Technique / Q000662:veterinary; D002094:Republic of Belarus; D012426:Russia; D012551:Schistosomatidae / Q000145:classification / Q000235:genetics / Q000302:isolation & purification*; D016415:Sequence Alignment / Q000662:veterinary; D014201:Trematode Infections / Q000175:diagnosis / Q000469:parasitology / Q000662:veterinary*
D018509:DNA, Helminth; D004275:DNA, Ribosomal