• Density trends and demographic signals uncover the long-term impact of transmissible cancer in Tasmanian devils

      Lazenby, Billie T.; Tobler, Mathias W.; Brown, William E.; Hawkins, Clare E.; Hocking, Greg J.; Hume, Fiona; Huxtable, Stewart J.; Iles, Philip; Jones, Menna E.; Lawrence, Clare; et al. (2018)
      Monitoring the response of wild mammal populations to threatening processes is fundamental to effective conservation management. This is especially true for infectious diseases, which may have dynamic and therefore unpredictable interactions with their host....
    • Development of a case definition for clinical feline herpesvirus infection in cheetahs (acinonyx jubatus) housed in zoos

      Witte, Carmel L.; Lamberski, Nadine; Rideout, Bruce; Fields, Victoria; Teare, Cyd Shields; Barrie, Michael; Haefele, Holly; Junge, Randall; Murray, Suzan; Hungerford, Laura L. (2013)
      The identification of feline herpesvirus (FHV) infected cheetahs (Acinonyx jubatus) and characterization of shedding episodes is difficult due to nonspecific clinical signs and limitations of diagnostic tests. The goals of this study were to develop a case definition for clinical FHV and describe the distribution of signs. Medical records from six different zoologic institutions were reviewed to identify cheetahs with diagnostic test results confirming FHV….
    • Drought reduces chytrid fungus (batrachochytrium dendrobatidis) infection intensity and mortality but not prevalence in adult crawfish frogs (lithobates areolatus)

      Terrell, Vanessa C. K.; Engbrecht, Nathan J.; Pessier, Allan P.; Lannoo, Michael J. (2014)
      To fully understand the impacts of the chytrid fungus Batrachochytrium dendrobatidis (Bd) on amphibians it is necessary to examine the interactions between populations and their environment. Ecologic variables can exacerbate or ameliorate Bd prevalence and infection intensity, factors that are positively related when Bd is acting on naive amphibian populations as an epidemic disease….
    • Early-life exposures and Johne’s disease risk in zoo ruminants

      Burgess, Tristan L.; Witte, Carmel L.; Rideout, Bruce (2017)
      Johne’s disease, caused by Mycobacterium avium subsp. paratuberculosis (MAP), is a chronic, progressive bacterial enteritis of ruminants that can cause serious losses in both livestock and exotic species. Infection risk in exotic ruminants is associated with maternal infection status, but the effect of other herdmates on risk of infection has not been reported, to our knowledge....
    • External reinfection of a fungal pathogen does not contribute to pathogen growth

      DiRenzo, Graziella V.; Tunstall, Tate S.; Ibáñez, Roberto; deVries, Maya S.; Longo, Ana V.; Zamudio, Kelly R.; Lips, Karen R. (2018)
      Chytridiomycosis is an emerging infectious disease of amphibians caused by the fungal pathogen Batrachochytrium dendrobatidis (Bd), which has led to devastating declines in amphibian populations worldwide. Current theory predicts that Bd infections are maintained through both reproduction on the host’s skin and reinfection from sources outside of the host....
    • Molecular epidemiology of Trypanosomatids and Trypanosoma cruzi in primates from Peru

      Aysanoa, Esar; Mayor, Pedro; Mendoza, A. Patricia; Zariquiey, Carlos M.; Morales, E. Angelo; Pérez, Jocelyn G.; Bowler, Mark; Ventocilla, Julio A.; González, Carlos; Baldeviano, G. Christian; et al. (2017)
      We determined the prevalence rate and risk of infection of Trypanosoma cruzi and other trypanosomatids in Peruvian non-human primates (NHPs) in the wild (n = 126) and in different captive conditions (n = 183). Blood samples were collected on filter paper, FTA cards, or EDTA tubes and tested using a nested PCR protocol targeting the 24S? rRNA gene....
    • Relationships between glucocorticoids and infection with Batrachochytrium dendrobatidis in three amphibian species

      Hammond, Talisin T.; Blackwood, Paradyse E.; Shablin, Samantha A.; Richards-Zawacki, Corinne L. (2020)
      It is often hypothesized that organisms exposed to environmental change may experience physiological stress, which could reduce individual quality and make them more susceptible to disease. Amphibians are amongst the most threatened taxa, particularly in the context of disease, but relatively few studies explore links between stress and disease in amphibian species....
    • Strongylid infection varies with age, sex, movement and social factors in wild African elephants

      Parker, Jenna M.; Goldenberg, Shifra Z.; Letitiya, David; Wittemyer, George (2020)
      Comparing parasitic infection among individuals of wildlife populations can provide insight into factors that influence wildlife disease ecology. Strongylids are parasitic worms that infect the intestinal tract of vertebrates, and infection with strongylids can be approximated by counting strongylid eggs in dung samples....