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Sarah A Hamer

Assistant Professor

Curriculum Vitae

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Phone: (979) 847-5693

Mailstop: 4458

Department: VIBS

Photo of Hamer, Sarah


  • D.V.M. Veterinary Medicine, Michigan State University 2011
  • Ph.D. Fisheries & Wildlife and Ecology, Michigan State University 2010
  • M.S. Natural Resources and Environmental Sciences, University of Illinois 2003
  • B.S. Natural Resources and Environmental Sciences, University of Illinois 2001


  • Diplomate of the American College of Veterinary Preventive Medicine 2016

Scholarly Interests

Disease ecology and epidemiology; one health initiative; wildlife diseases; vector-borne diseases; ticks; Lyme disease and other tick-borne zoonoses; Chagas disease; conservation medicine


Tick-borne infectious agents in nature: simulated effects of changes in host density on spatial-temporal prevalence in infected ticks
Wang H-H, Grant WE, Teel PD, Hamer SA.
Ecological Modelling. 2016 Jan; 323:77-86.
Survey of Feral Swine ( Sus scrofa ) Infection with the Agent of Chagas Disease ( Trypanosoma cruzi ) in Texas, 2013-14
Comeaux JM, Curtis-Robles R, Lewis BC, Cummings KJ, Mesenbrink BT, Leland BR, Bodenchuk MJ, Hamer SA.
J Wildl Dis. 2016 Jul; 52(3):627-30.
PMID: 27224214 []
Diagnostic Features of Acute Chagas Myocarditis with Sudden Death in a Family of Boxer Dogs
Vitt JP, Saunders AB, O'Brien MT, Mansell J, Ajithdoss DK, Hamer SA.
J Vet Intern Med. 2016 Jul; 30(4):1210-5.
PMID: 27163180 []
Evaluation of Faecal Salmonella Shedding Among Dogs at Seven Animal Shelters across Texas
Leahy AM, Cummings KJ, Rodriguez-Rivera LD, Rankin SC, Hamer SA.
Zoonoses Public Health. 2016 ; Epub ahead of print.
PMID: 26826098 []
Chagas disease in a Texan horse with neurologic deficits
Bryan LK, Hamer SA, Shaw S, Curtis-Robles R, Auckland LD, Hodo CL, Chaffin K, Rech RR.
Vet Parasitol. 2016 Jan; 30;216:13-7.
PMID: 26801589 []
Continental scale surveillance of infectious agents: Tick-, mosquito-, and rodent-borne parasite sampling designs for NEON
Springer YP, Hoekman D, Johnson PTJ, Duffy PA, Hufft RA, Barnett DT, Allan BF, Amman BR, Barker CM, Barrera R, Beard CB, Beati L, Begon M, Blackmore MS, Bradshaw WE, Brisson D, Calisher CH, Childs JE, Diuk-Wasser MA, Douglass RJ, Eisen RJ, Foley DH, Foley JE, Gaff HD, Gardner SL, Ginsberg HS, Glass GE, Hamer SA, Hayden MH, et al..
Ecosphere. 2016 May; 7(5):e01271..
A quantitative synthesis of the role of birds in carrying ticks and tick-borne pathogens in North America
Loss SR, Noden BH, Hamer GL, Hamer SA..
Oecologica. 2016 Sept; Epub ahead of print.
PMID: 27670413 []
Decreased small mammal and on-host tick abundance in association with invasive red imported fire ants (Solenopsis invicta)
Castellanos AA, Medeiros MC, Hamer GL, Morrow ME, Eubanks MD, Teel PD, Hamer SA, Light JE.
Biol Lett. 2016 Sept; 12(9). pii: 20160463.
PMID: 27651533 []
High Trypanosoma cruzi infection prevalence associated with minimal cardiac pathology among wild carnivores in central Texas
Curtis-Robles R, Lewis BC, Hamer SA.
Int J Parasitol Parasites Wildl. 2016 Apr; 12;5(2):117-23.
PMID: 27330982 []
Ixodes brunneus (Acarina: Ixodidae) from two bird hosts: A new Michigan tick
Keith RS, Keith BS, Scharf WC, Hamer SA.
Great Lakes Entomologist . 2015 Dec; 48:201-204.
Borrelia burgdorferi Not Confirmed in Human-Biting Amblyomma americanum Ticks from the Southeastern United States
Stromdahl EY, Nadolny RM, Gibbons JA, Auckland LD, Vince MA, Elkins CE, Murphy MP, Hickling GJ, Eshoo MW, Carolan HE, Crowder CD, Pilgard MA, Hamer SA.
J Clin Microbiol. 2015 May; 53(5):1697-704.
PMID: 25788545 []
Survey of a rodent and tick community in east-central Texas
Rodriguez J, Hamer S, Castellanos A, Light J.
Southeastern Naturalist. 2015 Sum; 14(3):415-424.
Simulation of climate-tick-host-landscape interactions: Effects of shifts in the seasonality of host population fluctuations on tick densities
Wang H-H, Grant WE, Teel PD, Hamer SA.
Journal of Vector Ecology. 2015 Fall; 40(2):247-55.
PMID: 26611958 []
Comparison of DNA and carbon and nitrogen stable isotope-based techniques for tick blood meal analysis
Hamer SA, Weghorst AC, Auckland LD, Roark EB, Strey OF, Teel PD, Hamer GL.
Journal of Medical Entomology. 2015 Sum; 52(5):1043-9.
PMID: 26336205 []
Avian Migrants Facilitate Invasions of Neotropical Ticks and Tick-Borne Pathogens into the United States
Cohen EB, Auckland LD, Marra PP, Hamer SA.
Appl Environ Microbiol. 2015 Dec; 81(24):8366-78.
PMID: 26431964 []
Combining Public Health Education and Disease Ecology Research: Using Citizen Science to Assess Chagas Disease Entomological Risk in Texas
Curtis-Robles R, Wozniak EJ, Auckland LD, Hamer GL, Hamer SA.
PLoS Negl Trop Dis. 2015 Dec; 9(12):e0004235.
PMID: 26658425 []
Coccidian Parasites and Conservation Implications for the Endangered Whooping Crane (Grus americana)
Bertram MR, Hamer GL, Snowden KF, Hartup BK, Hamer SA.
PLoS One. 2015 Jun; 10(6):e0127679.
PMID: 26061631 []
Shelter dogs as sentinels for Trypanosoma cruzi transmission across Texas
Tenney TD, Curtis-Robles R, Snowden KF, Hamer SA.
Emerg Infect Dis. 2014 Aug; 20(8):1323-6.
PMID: 25062281 []
Comparison of phenology and pathogen prevalence, including infection with the Ehrlichia muris-like (EML) agent, of Ixodes scapularis removed from soldiers in the midwestern and the northeastern United States over a 15 year period (1997-2012)
Stromdahl E, Hamer SA, Jenkins S, Sloan L, Williamson P, Foster E, Nadolny R, Elkins C, Vince M, Pritt B..
Parasit Vector. 2014 Dec; 7(1):553.
PMID: 25465046 []
Pathology in Practice: Infectious laryngotracheitis virus in organic laying chickens, Michigan.
Hamer SA, Amuzie CJ, Williams KJ, Smedley RC.
J Am Vet Med Assoc. 2013 Feb; 242(4):477-9.
PMID: 23363279 [PubMed - in process]
Coincident Tick Infestations in the Nostrils of Wild Chimpanzees and a Human in Uganda.
Hamer SA, Bernard AB, Donovan RM, Hartel JA, Wrangham RW, Otali E, Goldberg TL.
Am J Trop Med Hyg. 2013 Nov; 89(5):924-7.
PMID: 24080634 [PubMed - as supplied by publisher]
Wild birds and urban ecology of ticks and tick-borne pathogens, Chicago, Illinois, USA, 2005-2010.
Hamer SA, Goldberg TL, Kitron UD, Brawn JD, Anderson TK, Loss SR, Walker ED, Hamer GL.
Emerg Infect Dis. 2012 Oct; 18(10):1589-95.
PMID: 23017244 [PubMed - indexed for MEDLINE]
Human Risk of Infection with Borrelia burgdorferi, the Lyme Disease Agent, in Eastern United States.
Diuk-Wasser MA, Hoen AG, Cislo P, Brinkerhoff R, Hamer SA, Rowland M, Cortinas R, Vourc'h G, Melton F, Hickling GJ, Tsao JI, Bunikis J, Barbour AG, Kitron U, Piesman J, Fish D.
Am J Trop Med Hyg. 2012 Feb; 86(2):320-327.
PMID: 22302869 [PubMed - as supplied by publisher]
Geographic Variation in the Relationship between Human Lyme Disease Incidence and Density of Infected Host-Seeking Ixodes scapularis Nymphs in the Eastern United States.
Pepin KM, Eisen RJ, Mead PS, Piesman J, Fish D, Hoen AG, Barbour AG, Hamer S, Diuk-Wasser MA.
Am J Trop Med Hyg. 2012 Jun; 86(6):1062-1071.
PMID: 22665620 [PubMed - as supplied by publisher]
Synchronous phenology of juvenile Ixodes scapularis, vertebrate host relationships, and associated patterns of Borrelia burgdorferi ribotypes in the midwestern United States.
Hamer SA, Hickling GJ, Sidge JL, Walker ED, Tsao JI.
Ticks Tick Borne Dis. 2012 Apr; 3(2):65-74.
PMID: 22297162 [PubMed - in process]
Wild birds as sentinels for multiple zoonotic pathogens along an urban to rural gradient in greater chicago, illinois.
Hamer SA, Lehrer E, Magle SB.
Zoonoses Public Health. 2012 Aug; 59(5):355-64.
PMID: 22353581 [PubMed - in process]
Two Boundaries Separate Borrelia burgdorferi Populations in North America.
Margos G, Tsao JI, Castillo-Ramírez S, Girard YA, Hamer SA, Hoen AG, Lane RS, Raper SL, Ogden NH.
Appl Environ Microbiol. 2012 Sep; 78(17):6059-67.
PMID: 22729536 [PubMed - in process]
Associations of passerine birds, rabbits, and ticks with Borrelia miyamotoi and Borrelia andersonii in Michigan, U.S.A.
Hamer SA, Hickling GJ, Keith R, Sidge JL, Walker ED, Tsao JI.
Parasit Vectors. 2012 Oct; 5:231.
PMID: 23057837 [PubMed - in process]
Borrelia burgdorferi not detected in widespread Ixodes scapularis (Acari: Ixodidae) collected from white-tailed deer in Tennessee.
Rosen ME, Hamer SA, Gerhardt RR, Jones CJ, Muller LI, Scott MC, Hickling GJ.
J Med Entomol. 2012 Nov; 49(6):1473-80.
PMID: 23270178 [PubMed - in process]
Ixodes scapularis and Borrelia burgdorferi among diverse habitats within a natural area in east-central Illinois.
Rydzewski J, Mateus-Pinilla N, Warner RE, Hamer S, Weng HY.
Vector Borne Zoonotic Dis. 2011 Oct; 11(10):1351-8.
PMID: 21688974 [PubMed - in process]
Diverse Borrelia burgdorferi strains in a bird-tick cryptic cycle.
Hamer SA, Hickling GJ, Sidge JL, Rosen ME, Walker ED, Tsao JI.
Appl Environ Microbiol. 2011 Mar; 77(6):1999-2007.
PMID: 21257811 [PubMed - indexed for MEDLINE]
High-prevalence Borrelia miyamotoi infection among wild turkeys (Meleagris gallopavo) in Tennessee.
Scott MC, Rosen ME, Hamer SA, Baker E, Edwards H, Crowder C, Tsao JI, Hickling GJ.
J Med Entomol. 2010 Nov; 47(6):1238-42.
PMID: 21175079 [PubMed - indexed for MEDLINE]
Invasion of the lyme disease vector Ixodes scapularis: implications for Borrelia burgdorferi endemicity.
Hamer SA, Tsao JI, Walker ED, Hickling GJ.
Ecohealth. 2010 Aug; 7(1):47-63.
PMID: 20229127 [PubMed - indexed for MEDLINE]
Field and climate-based model for predicting the density of the Lyme disease vector Ixodes scapularis in the United States.
Diuk-Wasser MA, Vourc’h G. Cislo P, Gatewood AG, Melton F, Hamer SA, Rowland M, Cortinas MR, Hickling GJ, Tsao JI, Kitron U, Piesman J, Fish D..
Global Ecol Biogeogr. 2010 ; 19:504-514.
Climate and tick seasonality are predictors of Borrelia burgdorferi genotype distribution.
Gatewood AG, Liebman KA, Vourc'h G, Bunikis J, Hamer SA, Cortinas R, Melton F, Cislo P, Kitron U, Tsao J, Barbour AG, Fish D, Diuk-Wasser MA.
Appl Environ Microbiol. 2009 Apr; 75(8):2476-83.
PMID: 19251900 [PubMed - indexed for MEDLINE]
Use of tick surveys and serosurveys to evaluate pet dogs as a sentinel species for emerging Lyme disease.
Hamer SA, Tsao JI, Walker ED, Mansfield LS, Foster ES, Hickling GJ.
Am J Vet Res. 2009 Jan; 70(1):49-56.
PMID: 19119948 [PubMed - indexed for MEDLINE]
Zoonotic pathogens in Ixodes scapularis, Michigan.
Hamer SA, Roy PL, Hickling GJ, Walker ED, Foster ES, Barber CC, Tsao JI.
Emerg Infect Dis. 2007 Jul; 13(7):1131-3.
PMID: 18214207 [PubMed - indexed for MEDLINE]
Does the roosting behavior of birds affect transmission dynamics of West Nile virus?
Ward MP, Raim A, Yaremych-Hamer S, Lampman R, Novak RJ.
Am J Trop Med Hyg. 2006 Aug; 75(2):350-5.
PMID: 16896147 [PubMed - indexed for MEDLINE]
Spatiotemporal patterns of host-seeking Ixodes scapularis nymphs (Acari: Ixodidae) in the United States.
Diuk-Wasser MA, Gatewood AG, Cortinas MR, Yaremych-Hamer S, Tsao J, Kitron U, Hickling G, Brownstein JS, Walker E, Piesman J, Fish D.
J Med Entomol. 2006 Mar; 43(2):166-76.
PMID: 16619595 [PubMed - indexed for MEDLINE]
West Nile virus and high death rate in American crows.
Yaremych SA, Warner RE, Mankin PC, Brawn JD, Raim A, Novak R.
Emerg Infect Dis. 2004 Apr; 10(4):709-11.
PMID: 15200865 [PubMed - indexed for MEDLINE]
Home range and habitat use by American Crows in east-central Illinois
Yaremych SA, Novak RJ, Raim AJ, Mankin PC, and Warner RE.
Wilson Bull. 2004 ; 116:232-239.
Gender determination and sex-specific West Nile virus mortality of American Crows
Yaremych SA, Levengood JM, Novak RJ, Mankin PC, and Warner RE.
Wildl Soc Bull. 2004 ; 32:893-899.
Use of diffusion to determine soil cation-exchange capacity by ammonium saturation
Mulvaney RL, Yaremych SA, Khan SA, Swiader JM, and Horgan BP.
Comm Soil Sci Plant Anal. 2004 ; 35:51-67.
West Nile virus detection in American crows.
Yaremych SA, Warner RE, Van de Wyngaerde MT, Ringia AM, Lampman R, Novak RJ.
Emerg Infect Dis. 2003 Oct; 9(10):1319-21.
PMID: 14609472 [PubMed - indexed for MEDLINE]

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