On a large scale I am interested in wildlife and human host responses to parasites and specifically the underlying physiological consequences of infection. I have a diverse educational background including a veterinary technical degree from Colorado Mountain College and a Masters degree in systematic parasitology from Texas A&M University. Here in the Johnson Laboratory I work a dual role as our laboratory manager and as a research associate. My manager duties include ordering supplies, hiring summer research technicians, permit applications, assisting in grant submissions, and mentoring undergraduate and high school students. As a research associate, my expertise lies in identification of parasites using molecular and morphological techniques, developing and running ELISA, preparation and execution of laboratory and mesocosm experiments, animal husbandry, fecal analysis, and complete blood counts. Some of my current published research includes effects of TTX on trematodes and behavior changes in Daphina caused by parasite infection. In my free time (hahahha) I enjoy hiking with my husband and our two dogs (Inca and Trace), drinking beer at wonderful local breweries, nonfiction reading, or playing board games with friends.
Tornabene, B.J., Blaustein, A.R., Briggs, C.J., Calhoun, D.M., Johnson, P.T.J., McDevitt-Galles, T., Rohr, J.R., and Hoverman, J.T. (2017). Assessing the influence of landscape and environmental factors on ranavirus epidemiology in a California amphibian assesmblage. Ecography (in review).
Johnson, P.T.J., Calhoun, D.M., Stokes, A.N., Susbilla, C.B., McDevitt-Galles, T., Briggs, C., Hoverman, J.T., Tkach, V., and de Roode, J. (2017). Of poisons and parasites: the defensive role of tetrodotoxin against infections in adult newts. Functional Ecology (in review).
Calhoun, D.M., McDevitt-Galles, T., and Johnson, P.T.J. (2017). Parasites of invasive freshwater fishes and the factors affecting their richness and abundance. Freshwater Science (in review).
*Hannon, E. R., Calhoun, D. M., *Chadalawada, S. and P. T. J. Johnson. (2017). Circadian rhythms of trematode parasites: applying mixed models to test underlying patterns. Parasitology (in review).
Calhoun, D.M., Bucciarelli, G.M., Kats, L.B., Zimmer, R.K., and Johnson, P.T.J. (2017) Noxious newts and their natural enemies: experimental effects of tetrodotoxin exposure on trematode parasites and aquatic macroinvertebrates. Toxicon (accepted)
Johnson, P.T.J., Stanton, D., Forshay, K., and Calhoun, D.M. (2017) Vertically challenged: how disease suppresses Daphnia vertical migration behavior. Limnology and Oceanogrpahy (accepted).
Koprivnikar, J., Riepe, T.B., Calhoun, D.M., and Johnson, P.T.J. (2017). Whether larval amphibians school does not affect the parasite aggregation rule: testing the effects of host spatial heterogeneity in field and experimental studies. Oikos (accepted).
Calhoun, D.M., Woodhams, D., *Howard, C., LaFonte, B.E., Gregory, J.R., and Johnson, P.T.J. (2016). Role of antimicrobial peptides in amphibian defense against trematode infection. EcoHealth 13: 383-391
McAllister, C.T., Bursey, C.R., and Calhoun, D.M. (2016). Commensal protista, cnidaria and helminth parasites of the Cajun chorus frog, Pseudacris fouquettei (Anura: Hylidae), from Oklahoma. Proceedings of the Oklahoma Academy of Sciences 95.
*Hannon, E.R., Kinsella, J.M., Calhoun, D.M., Joseph, M.B., and Johnson, P.T.J. (2016). Endohelminths in bird hosts from Northern California and an analysis of the role of life history traits on parasite richness. Journal of Parasitology 102: 199-207.
Calhoun, D.M., Schaffer, P.A., Gregory, J.R., *Hardy, K.M., and Johnson, P.T.J. (2015). Experimental infections of bluegill with the trematode Ribeiroia ondatrae (Digenea: Cathaemasiidae): Histopathology and Hematological Response. Journal of Aquatic Animal Health 27:185-191.
Calhoun, D.M., Curran, S.S., Pulis, E.E., Provaznik, J.M., and Franks, J.S. (2013). Hirudinella ventricosa (Pallas, 1774) Baird, 1853 represents a species complex based on ribosomal DNA and affinity of the genus in Hemiurata Skrjabin & Guschanskaja, 1954 base on lsrDNA. Systematic Parasitology 86: 197-208.
Calhoun, D.M., and Dronen, N.O. (2012). A re-evaluation of specimens of Mesocoelium monas (Platyhelminthes: Digenea: Mesocoeliidae) form the National History Museum, UK and the United States National Parasite Collection, USA. Zootaxa 3589: 1-29.
Dronen, N.O., Calhoun, D.M., and Simcik, S.R. (2012). Mesocoelium Ohdner, 1901 (Digenea: Mesocoeliidae) revision of the family and re-evaluation of species composition in the genus. Zootaxa 3387: 1-96.
Calhoun, D.M. (2011). A re-evaluation of the taxonomy of Mesocoelium monas complex (Platyhelminthes: Digenea: Mesocoeliidae). Texas A&M University Masters thesis, 97 pp.
Calhoun, D.M. (2009). ABC’s of a CBC: An introduction to avian and mammalian complete blood count. Wildlife Rehabilitation 26: 133-142.