Faculty profile

Andrew McElwain

Visiting Assistant Professor


266 Shineman Center

Office hours

By appointment only

Andrew McElwain


I use light microscopy and scanning electron microscopy to study tissue structure of fishes and freshwater mussels to better understand how cells, tissues and organs function. I am especially interested in histopathology of parasitic infections.

Specialty areas:

  • histology
  • parasitology


* indicates undergraduate research student

  • McElwain, A. 2019. Are parasites and disease contributing to the decline of freshwater mussels? Freshwater Mollusk Biology and Conservation, Freshwater Mollusk Health and Disease Workshop Special Issue, In Press
  • McElwain, A., M. B. Warren, F. B. Pereira, S. Ksepka, and S. A. Bullard. 2019. Pathobiology and first report of larval nematodes (Ascaridomorpha sp.) infecting freshwater mussels (Villosa nebulosa, Unionidae), including an inventory of nematode infections in marine and freshwater bivalves. International Journal for Parasitology: Parasites and Wildlife 10: 41–58.
  • McElwain, A., R. Fleming*, M. Lajoie*, C. Maney*, B. Springall*, and S. A. Bullard.  2016.  Pathological changes associated with eggs and larvae of Unionicola sp. (Acari: Unionicolidae) infecting Strophitus connasaugaensis (Bivalvia: Unionidae) from Alabama creeks.  Journal of Parasitology 102: 75–86.
  • McElwain, A., and S. A. Bullard. 2014. Histological atlas of freshwater mussels (Bivalvia, Unionidae): Villosa nebulosa (Ambleminae: Lampsilini), Fusconaia cerina (Ambleminae: Pleurobemini), and Strophitus connasaugaensis Unioninae: Anodontini). Malacologia 57: In Press.
  • McElwain, A., C. Ray, B. Su, M. Shang, M. C. Fobes, P. Duncan, R. Thresher, R. A. Dunham, and S. A. Bullard. 2013. Osteological and histological details of unilateral microphthalmia and anophthalmia in juvenile common carp (Cyprinus carpio). Aquaculture 400-401: 135-141.
  • Bullard, S. A., C. F. Ruiz, A. McElwain, M. J. Murray, J. D. Borucinska, and G. W. Benz. 2012. Huffmanela cf. carcharhini (Nematoda, Trichosomoididae, Huffmanelinae) from skin of a sandbar shark, Carcharhinus plumbeus, in the Pacific Ocean. Journal of Parasitology 98: 333-340.
  • Olivares-Fuster, O., S. A. Bullard, A. McElwain, M. J. Llosa, and C. R. Arias. 2011. Kinetics of Flavobacterium columnare adhesion to channel catfish (Ictalurus punctatus) and zebra danio (Danio rerio) tissues after immersion challenge. Diseases of Aquatic Organisms 96: 211-227.
  • Bullard, S. A., A. McElwain, and C. R. Arias. 2011. Scanning electron microscopy of "saddleback" lesions associated with experimental infections of Flavobacterium columnare in channel catfish, Ictalurus punctatus, (Siluriformes: Ictaluridae) and zebrafish, Danio rerio, (Cypriniformes: Cyprinidae). Journal of the World Aquaculture Society 42: 906-913.
  • McElwain, A., J. W. Kohl, J. Bojkovic, and G. W. Benz. 2010. Distribution of Kroeyerina elongata (Kroyeriidae, Siphonostomatoida, Copepoda) in the olfactory sacs of the blue shark, Prionace glauca. Journal of Parasitology 96: 887-896.
  • McElwain, A., O. Olivares-Fuster, C. R. Arias, and S. A. Bullard. 2009. Preliminary observations of pathological changes to skin and gill of channel catfish (Ictalurus punctatus) and zebra danio (Danio rerio) exposed to Flavobacterium columnare. Proceedings of the 2nd International Flavobacterium Workshop. Paris, France (editor reviewed).
  • Ulicny, K. J., D. R. Stewart, A. McElwain, E. R. Salmon, S. A. Bullard, J. O. Cook, G. B. Skomal, H. L. Pratt, Jr., and G. W. Benz. 2007. Sealing Whirl-Pak®-type bags containing wet samples. Journal of the Tennessee Academy of Sciences 82: 88-89.
  • Benz, G. W., K. Nagasawa, A. Yamaguchi, B. C. McMeans, A. McElwain. 2006. New host and ocean records for Driocephalus cerebrinoxius (Sphyriidae, Siphonostomatoida) and a reconsideration of phylogeny within Sphyriidae. Acta Ichthyologica et Piscatoria 36: 1-9.


Ph.D., Fisheries and Allied Aquacultures, Auburn University
M.S., Biology, Middle Tennessee State University
B.S., Biology, Westfield State College