Caroline F. Frey DVM, Ph.D.

CFIA Saskatoon Laboratory
Centre for Foodborne and Animal Parasitology, Saskatoon Laboratory

116 Veterinary Road
Saskatoon SK S7N 2R3


Research Interests:
My main research interests are the development of methods for detecting and isolating different parasites (Toxoplasma and other apicomplexans, Trichinella, Echinococcus etc.) in their hosts, in food, or in their vector species. Furthermore, I am interested in developing molecular and serological tools for the characterization and for epidemiologic investigations concerning those and other parasites under the mandate of the CFIA, like e.g. trichomonads.

Keywords: Toxoplasma, Trichinella, Echinococcus spp, trichomonads

Recent Publications:

Frey CF, Müller N, Stäuber N, Marreros N, Hofmann L, Hentrich B, Hirsbrunner G (2017). Simplicimonas-like DNA in vaginal swabs of cows and heifers cross-reacting in the real-time PCR for T. foetus. Vet. Parasitol. 237:30-36.

Casteriano A, Molini U, Kandjumbwa K, Khaiseb S, Frey CF, Šlapeta J (2016). Novel genotype of Tritrichomonas foetus from cattle in Southern Africa. Parasitol. 9:1-6.

Frey CF, Regidor-Cerrillo J, Marreros N, García-Lunar P, Gutiérrez-Expósito D, Schares G, Dubey JP, Gentile A, Jacquiet P, Shkap V, Cortes H, Ortega-Mora LM, Álvarez-García G (2016). Besnoitia besnoiti lytic cycle in vitro and differences in invasion and intracellular proliferation among isolates. Parasit Vectors. 9:115.

Corsini M, Geissbühler U, Howard J, Gottstein B, Spreng D, Frey CF (2015). Clinical presentation, diagnosis, therapy and outcome of alveolar echinococcosis in dogs. Vet Rec. 177: 569.

Gendron K, Goepfert C, Linon E, Posthaus H, Frey CF (2015). Pulmonary Echinococcus multilocularis metastasis in a dog. Can Vet J. 56: 267-271.

Bernasconi Ch, Bodmer M, Doherr MG, Janett F, Thomann A, Spycher C, Iten, C, Hentrich B, Gottstein B, Müller N, Frey CF (2014). Tritrichomonas foetus: prevalence study in naturally mating bulls in Switzerland. Vet. Parasitol. 200: 289-294.

Maksimov P, Zerweck J, Dubey JP, Pantchev N, Frey CF, Maksimov A, Reimer U, Schutkowski M, Hosseininejad M, Ziller M, Conraths FJ, Schares G (2013). Serotyping of Toxoplasma gondii in cats (Felis domesticus) reveals predominance of type II infections in Germany. PLoS One. 8(11):e80213.

Frey CF, Gutiérrez-Expósito D, Ortega-Mora LM, Benavides J, Marcén JM, Castillo JA, Casasús I, Sanz A, García-Lunar P, Esteban-Gil A, Alvarez-García G (2013). Chronic bovine besnoitiosis: Intra-organ parasite distribution, parasite loads and parasite-associated lesions in subclinical cases. Vet. Parasitol. 197: 95-103.

Schaarschmidt D, Gilli U, Gottstein B, Marreros N, Kuhnert P, Daeppen JA, Rosenberg G, Hirt D, Frey CF (2013). Questing Dermacentor reticulatus harbouring Babesia canis DNA associated with outbreaks of canine babesiosis in the Swiss Midlands. Ticks Tick Borne Dis. 4: 334-340.

Slapeta J, Müller N, Stack CM, Walker G, Lew-Tabor A, Tachezy J, Frey CF (2012). Comparative analysis of Tritrichomonas foetus (Riedmüller, 1928) cat genotype, T. foetus (Riedmüller, 1928) cattle genotype and Tritrichomonas suis (Davaine, 1875) at 10 DNA loci. Int. J. Parasitol. 42: 1143-1149.

Berger-Schoch AE, Bernet D, Doherr MG, Gottstein B, Frey CF (2011). Toxoplasma gondii in Switzerland: A serosurvey based on meat juice analysis of slaughter pigs, wild boar, sheep and cattle. Zoonoses Public Health. 58: 472-478.

Berger–Schoch AE, Herrmann DC, Schares G, Müller N, Bernet D, Gottstein B, Frey CF (2011). Prevalence and genotypes of Toxoplasma gondii in feline faeces (oocysts) and meat from sheep, cattle and pigs in Switzerland. Vet. Parasitol. 177: 290-297.