PMID- 20447769 OWN - NLM STAT- MEDLINE DCOM- 20101203 LR - 20100806 IS - 1873-2550 (Electronic) IS - 0304-4017 (Linking) VI - 172 IP - 1-2 DP - 2010 Aug 27 TI - Fluorescence in situ hybridization for identification of Tritrichomonas foetus in formalin-fixed and paraffin-embedded histological specimens of intestinal trichomoniasis. PG - 139-43 LID - 10.1016/j.vetpar.2010.04.014 [doi] AB - In the present study a highly species-specific oligonucleotide sequence of Tritrichomonas foetus 18S rRNA was used to design an antisense probe for identification of T. foetus in formalin-fixed and paraffin-embedded histological specimens by means of fluorescence in situ hybridization (FISH). Using archival histological specimens from several species with light microscopic evidence of intestinal trichomoniasis, and under optimized hybridization conditions, the probe positively identified trichomonads in colonic specimens from piglets and a kitten with PCR-confirmed T. foetus infection. Neither positive hybridization of the probe or PCR amplification of T. foetus DNA was observed in histological specimens from hamster (Tritrichomonas muris), turkey, nor mouse (Entamoeba muris) intestinal protozoal infections. Sequence-specific binding of the probe was further verified by successfully out-competing the hybridization with 10 x molar excess unlabeled probe and failure of a labeled sense probe to hybridize. The FISH assay described here enables simultaneous location and molecular identification of T. foetus in formalin-fixed and paraffin-embedded histological specimens of intestinal trichomoniasis. The methods employed are likely to also be applicable to probes designed for specific recognition of other trichomonad species, especially in mammalian tissue where red blood cell auto-fluorescence can be easily differentiated from the hybridization signal of trichomonads. CI - (c) 2010 Elsevier B.V. All rights reserved. FAU - Gookin, J L AU - Gookin JL AD - Department of Clinical Sciences, College of Veterinary Medicine, North Carolina State University, Raleigh, NC, USA. Jody Gookin@ncsu.edu FAU - Stone, M R AU - Stone MR FAU - Yaeger, M J AU - Yaeger MJ FAU - Meyerholz, D K AU - Meyerholz DK FAU - Moisan, Peter AU - Moisan P LA - eng PT - Journal Article DEP - 20100418 PL - Netherlands TA - Vet Parasitol JT - Veterinary parasitology JID - 7602745 RN - 0 (DNA, Protozoan) RN - 0 (RNA, Ribosomal, 18S) SB - IM MH - Animals MH - Cats MH - DNA, Protozoan/chemistry/genetics MH - Histocytochemistry MH - In Situ Hybridization, Fluorescence/*methods MH - Intestinal Diseases/diagnosis/*parasitology MH - Microscopy, Fluorescence MH - Polymerase Chain Reaction MH - RNA, Ribosomal, 18S/chemistry/genetics MH - Swine MH - Trichomonas Infections/*diagnosis MH - Tritrichomonas foetus/genetics/*isolation & purification EDAT- 2010/05/08 06:00 MHDA- 2010/12/14 06:00 CRDT- 2010/05/08 06:00 PHST- 2009/10/14 00:00 [received] PHST- 2010/03/23 00:00 [revised] PHST- 2010/04/09 00:00 [accepted] PHST- 2010/05/08 06:00 [entrez] PHST- 2010/05/08 06:00 [pubmed] PHST- 2010/12/14 06:00 [medline] AID - S0304-4017(10)00233-5 [pii] AID - 10.1016/j.vetpar.2010.04.014 [doi] PST - ppublish SO - Vet Parasitol. 2010 Aug 27;172(1-2):139-43. doi: 10.1016/j.vetpar.2010.04.014. Epub 2010 Apr 18.