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Widespread Occurrence Of Ranavirus In Pond-Breeding Amphibian Populations., J. Hoverman, Matthew Gray, Debra Miller, Nathan Haislip Dec 2011

Widespread Occurrence Of Ranavirus In Pond-Breeding Amphibian Populations., J. Hoverman, Matthew Gray, Debra Miller, Nathan Haislip

Debra L Miller

Ranaviruses are an emerging threat for many amphibian populations, yet their distribution in amphibian communities and the association of infection with possible stressors and species is not fully understood due to historically sparse surveillance. Agricultural practices that reduce the water quality of amphibian breeding habitats (e.g., cattle access to wetlands) and environmental stressors (e.g., lower temperatures) may contribute to ranavirus emergence. We tested larval amphibians for ranavirus infection across four seasons in farm ponds ( n=40) located in Tennessee, USA. Cattle at various densities were allowed access to half of the sampled ponds. Ranavirus infections were detected in ...


Maternal Health Status Correlates With Nest Success Of Leatherback Sea Turtles (Dermochelys Coriacea) From Florida, J. Perrault, Debra Miller, E. Eads, C. Johnson, A. Merrill, L. Thompson, J. Wynekenmaternal Health Status Correlates With Nest Success Of Leatherback Sea Turtles (Dermochelys Coriacea) From Florida Dec 2011

Maternal Health Status Correlates With Nest Success Of Leatherback Sea Turtles (Dermochelys Coriacea) From Florida, J. Perrault, Debra Miller, E. Eads, C. Johnson, A. Merrill, L. Thompson, J. Wynekenmaternal Health Status Correlates With Nest Success Of Leatherback Sea Turtles (Dermochelys Coriacea) From Florida

Debra L Miller

Of the seven sea turtle species, the critically endangered leatherback sea turtle (Dermochelys coriacea) exhibits the lowest and most variable nest success (i.e., hatching success and emergence success) for reasons that remain largely unknown. In an attempt to identify or rule out causes of low reproductive success in this species, we established the largest sample size (n = 60–70 for most values) of baseline blood parameters (protein electrophoresis, hematology, plasma biochemistry) for this species to date. Hematologic, protein electrophoretic and biochemical values are important tools that can provide information regarding the physiological condition of an individual and population health ...


Reliability Of Non-Lethal Surveillance Methods For Detecting Ranavirus Infection, Matthew Gray, Debra Miller, J. Hoverman Dec 2011

Reliability Of Non-Lethal Surveillance Methods For Detecting Ranavirus Infection, Matthew Gray, Debra Miller, J. Hoverman

Debra L Miller

Ranaviruses have been identified as the etiologic agent in many amphibian die-offs across the globe. Polymerase chain reaction (PCR) is commonly used to detect ranavirus infection in amphibian hosts, but the test results may vary between tissue samples obtained by lethal and non-lethal procedures. Testing liver samples for infection is a common lethal sampling technique to estimate ranavirus prevalence because the pathogen often targets this organ and the liver is easy to identify and collect. However, tail clips or swabs may be more practicable for ranavirus surveillance programs compared with collecting and euthanizing animals, especially for uncommon species. Using PCR ...


Natural Stressors And Disease Risk: Does The Threat Of Predation Increase Amphibian Susceptibility To Ranavirus?, Nathan Haislip, J. Hoverman, Debra Miller, Matthew Gray Dec 2011

Natural Stressors And Disease Risk: Does The Threat Of Predation Increase Amphibian Susceptibility To Ranavirus?, Nathan Haislip, J. Hoverman, Debra Miller, Matthew Gray

Debra L Miller

Emerging infectious diseases have been identified as threats to biodiversity, yet our understanding of the factors contributing to host susceptibility to pathogens within natural populations remains limited. It has been proposed that species interactions within communities affect host susceptibility to pathogens, thereby contributing to disease emergence. In particular, predation risk is a common natural stressor that has been hypothesized to compromise immune function of prey through chronic stress responses possibly leading to increased susceptibility to pathogens. We examined whether predation risk experienced during the development of four larval anuran species increases susceptibility (mortality and infection) to ranaviruses, a group of ...


Ranavirus: Past, Present And Future., D. Lesbarrères, A. Balseiro, J. Brunner, V. Chinchar, A. Duffus, J. Kirby, Debra Miller, J. Robert, D. Schock, T. Waltzek, Matthew Gray Dec 2010

Ranavirus: Past, Present And Future., D. Lesbarrères, A. Balseiro, J. Brunner, V. Chinchar, A. Duffus, J. Kirby, Debra Miller, J. Robert, D. Schock, T. Waltzek, Matthew Gray

Debra L Miller

Emerging infectious diseases are a significant threat to global biodiversity. While historically overlooked, a group of iridoviruses in the genus Ranavirus has been responsible for die-offs in captive and wild amphibian, reptile and fish populations around the globe over the past two decades. In order to share contemporary information on ranaviruses and identify critical research directions, the First International Symposium on Ranaviruses was held in July 2011 in Minneapolis, MN, USA. Twenty-three scientists and veterinarians from nine countries examined the ecology and evolution of ranavirus-host interactions, potential reservoirs, transmission dynamics, as well as immunological and histopathological responses to infection. In ...


Development And Disease: How Susceptibility To An Emerging Pathogen Changes Through Anuran Development., N. Haislip, Matthew Gray, J. Hoverman, Debra Miller Dec 2010

Development And Disease: How Susceptibility To An Emerging Pathogen Changes Through Anuran Development., N. Haislip, Matthew Gray, J. Hoverman, Debra Miller

Debra L Miller

Ranaviruses have caused die-offs of amphibians across the globe. In North America, these pathogens cause more amphibian mortality events than any other pathogen. Field observations suggest that ranavirus epizootics in amphibian communities are common during metamorphosis, presumably due to changes in immune function. However, few controlled studies have compared the relative susceptibility of amphibians to ranaviruses across life stages. Our objectives were to measure differences in mortality and infection prevalence following exposure to ranavirus at four developmental stages and determine whether the differences were consistent among seven anuran species. Based on previous studies, we hypothesized that susceptibility to ranavirus would ...


Why Are Hatching And Emergence Success Low? Mercury And Selenium Concentrations In Nesting Leatherback Sea Turtles (Dermochelys Coriacea) And Their Young In Florida., J. Perrault, J. Wyneken, L. Thompson, C. Johnson, Debra Miller Dec 2010

Why Are Hatching And Emergence Success Low? Mercury And Selenium Concentrations In Nesting Leatherback Sea Turtles (Dermochelys Coriacea) And Their Young In Florida., J. Perrault, J. Wyneken, L. Thompson, C. Johnson, Debra Miller

Debra L Miller

Leatherback sea turtles (Dermochelys coriacea) have low hatching and emergence success compared to other sea turtle species. Postmortem examinations of hatchlings showed degeneration of heart and skeletal muscle that was similar to that found in other neonates with selenium deficient mothers. Selenium deficiency can result from elevated concentrations of bodily mercury. Ingested mercury is detoxified by the liver through mercury-selenium compound formation. In animals persistently exposed to mercury, the liver's ability to detoxify this element may decrease, especially if dietary selenium is insufficient. We measured mercury and selenium concentrations in nesting female leatherbacks and their hatchlings from Florida and ...


2011 International Ranavirus Symposium, R. Marschang, Debra Miller Dec 2010

2011 International Ranavirus Symposium, R. Marschang, Debra Miller

Debra L Miller

This article summarizes the state of Ranavirus knowledge, ongoing research, and future activities. Ranaviruses are large dsDNA viruses in the family Iridoviridae. They were originally detected in frogs (hence the name of the genus, Ranavirus) but are now known to infect and cause disease in fish and reptiles as well as in amphibians. Ranaviruses have been associated with numerous die-offs in amphibian populations and have also been increasingly found in fish and reptiles in recent years. Their role in amphibian declines and as emerging pathogens has led to increased awareness of the importance of these pathogens in conservation and ectothermic ...


Histological Findings In Free-Ranging Sarasota Bay Bottlenose Dolphin (Tursiops Truncatus) Skin: Mercury, Selenium, And Seasonal Factors., Debra Miller, V. Woshner, E. Styer, S. Ferguson, K. Knott, Matthew Gray, R. Wells, T. O'Hara Dec 2010

Histological Findings In Free-Ranging Sarasota Bay Bottlenose Dolphin (Tursiops Truncatus) Skin: Mercury, Selenium, And Seasonal Factors., Debra Miller, V. Woshner, E. Styer, S. Ferguson, K. Knott, Matthew Gray, R. Wells, T. O'Hara

Debra L Miller

Full-thickness epidermal biopsy samples were collected from free-ranging common bottlenose dolphins (Tursiops truncatus) in Sarasota Bay, Florida, USA. Season (summer or winter) of collection, mercury (Hg) concentration, and selenium (Se) concentration were compared to histologic parameters. Epidermal Hg concentration was positively related to age (P<0.001) and negatively related to height of the stratum spinosum (P<0.05). The mitotic index and heights of the stratum externum and intermedium were lower in summer than in winter (P<0.01). Transmission electron microscopic examination revealed variation in the diameters (60–138 nm) and arrangements of collagen fibers, regardless of age ...


Intersex Condition Of Shoal Bass In The Flint River, Georgia., D. Ingram, Debra Miller, T. Ingram, J. Tannehill Dec 2010

Intersex Condition Of Shoal Bass In The Flint River, Georgia., D. Ingram, Debra Miller, T. Ingram, J. Tannehill

Debra L Miller

We examined male shoal bass Micropterus cataractae from the Flint River, Georgia, to determine the prevalence of intersex. During March and April 2010, we sampled 61 shoal bass from six sites along the Flint River. Testes were examined histologically and classified as intersex if the presence of oocytes was noted. Using a severity index, we compared samples collected on different dates and from different locations according to age and testis weight. No significant variations were noted among any of the groupings. Further investigation is needed to determine whether the intersex condition in shoal bass is severe enough to warrant concern ...


Phylogeny, Life History, And Ecology Contribute To Differences In Amphibian Susceptibility To Ranaviruses., J. Hoverman, Matthew Gray, Nathan Haislip, Debra Miller Dec 2010

Phylogeny, Life History, And Ecology Contribute To Differences In Amphibian Susceptibility To Ranaviruses., J. Hoverman, Matthew Gray, Nathan Haislip, Debra Miller

Debra L Miller

Research that identifies the potential host range of generalist pathogens as well as variation in host susceptibility is critical for understanding and predicting the dynamics of infectious diseases within ecological communities. Ranaviruses have been linked to amphibian die-off events worldwide with the greatest number of reported mortality events occurring in the United States. While reports of ranavirus-associated mortality events continue to accumulate, few data exist comparing the relative susceptibility of different species. Using a series of laboratory exposure experiments and comparative phylogenetics, we compared the susceptibilities of 19 amphibian species from two salamander families and five anurans families for two ...


Ecopathology Of Ranaviruses Infecting Amphibians., Debra Miller, Matthew Gray, A. Storfer Dec 2010

Ecopathology Of Ranaviruses Infecting Amphibians., Debra Miller, Matthew Gray, A. Storfer

Debra L Miller

Ranaviruses are capable of infecting amphibians from at least 14 families and over 70 individual species. Ranaviruses infect multiple cell types, often culminating in organ necrosis and massive hemorrhaging. Subclinical infections have been documented, although their role in ranavirus persistence and emergence remains unclear. Water is an effective transmission medium for ranaviruses, and survival outside the host may be for significant duration. In aquatic communities, amphibians, reptiles and fish may serve as reservoirs. Controlled studies have shown that susceptibility to ranavirus infection and disease varies among amphibian species and developmental stages, and likely is impacted by host-pathogen coevolution, as well ...


Streptococcus Phocae Isolated From A Spotted Seal ( Phoca Largha) With Pyometra In Alaska., K. Hueffer, C. Lieske, L. Mcgilvary, R. Hare, Debra Miller, T. O'Hara Dec 2010

Streptococcus Phocae Isolated From A Spotted Seal ( Phoca Largha) With Pyometra In Alaska., K. Hueffer, C. Lieske, L. Mcgilvary, R. Hare, Debra Miller, T. O'Hara

Debra L Miller

A spotted seal harvested by subsistence hunters in Kotzebue Sound, Alaska (USA), showed a grossly enlarged uterus and associated lymph nodes. Streptococcus phocae was isolated from the purulent uterine discharge. Histopathologic examination revealed inflammation that was limited to the uterine mucosa. Lymph nodes draining the affected organ were reactive but no evidence of active infection was found in the lymph nodes. This report is the first Streptococcus phocae isolated from spotted seals as well as the first report of pyometra as the main pathologic finding associated with this pathogen. Isolation of this pathogen from Alaska expands the reported range to ...


Diagnostic Exercise: Chronic Vomiting In A Dog., Debra Miller Dec 2009

Diagnostic Exercise: Chronic Vomiting In A Dog., Debra Miller

Debra L Miller

An approximately one-and-a-half-year-old, neutered male, mixed-breed dog was presented for a chronic history of vomiting. Profuse diarrhea was also noted during examination. An exploratory laparotomy was performed, bone chips were removed from the stomach, and a raised, circular area of gastric mucosa was biopsied. Histologically, there was severe gastric cryptosporidiosis as well as numerous spiral bacteria, consistent with Helicobacter spp. Polymerase chain reaction revealed visible bands for the 18S ribosomal RNA gene for Cryptosporidium spp. The polymerase chain reaction product was sequenced and was found to be most similar to Cryptosporidium muris. Both the gastric location and the species of ...


Amphibian Decline And Mass Mortality: The Value Of Visualizing Ranavirus In Tissue Sections., Debra Miller, Matthew Gray Dec 2009

Amphibian Decline And Mass Mortality: The Value Of Visualizing Ranavirus In Tissue Sections., Debra Miller, Matthew Gray

Debra L Miller

No abstract provided.


Epizootic Ulcerative Syndrome Caused By Aphanomyces Invadans In Captive Bullseye Snakehead Channa Marulius Collected From South Florida, Usa., R. Saylor, Debra Miller, M. Vandersea, M. Bevelhimer, P. Schofield, W. Bennett Dec 2009

Epizootic Ulcerative Syndrome Caused By Aphanomyces Invadans In Captive Bullseye Snakehead Channa Marulius Collected From South Florida, Usa., R. Saylor, Debra Miller, M. Vandersea, M. Bevelhimer, P. Schofield, W. Bennett

Debra L Miller

Epizootic ulcerative syndrome (EUS) caused by the oomycete Aphanomyces invadans is an invasive, opportunistic disease of both freshwater and estuarine fishes. Originally documented as the cause of mycotic granulomatosis of ornamental fishes in Japan and as the cause of EUS of fishes in southeast Asia and Australia, this pathogen is also present in estuaries and freshwater bodies of the Atlantic and gulf coasts of the USA. We describe a mass mortality event of 343 captive juvenile bullseye snakehead Channa marulius collected from freshwater canals in Miami-Dade County, Florida. Clinical signs appeared within the first 2 d of captivity and included ...


Gingival Osteogenic Melanoma In Two Dogs., A. Ellis, B. Harmon, Debra Miller, N. Northup, K. Latimer, E. Uhl Dec 2009

Gingival Osteogenic Melanoma In Two Dogs., A. Ellis, B. Harmon, Debra Miller, N. Northup, K. Latimer, E. Uhl

Debra L Miller

Osteogenic melanoma is a rare variant of metaplastic malignant melanoma in human medicine and appears to be a similarly rare variant in dogs. Two dogs with oral malignant melanoma with neoplastic bone formation are reported in this study. Both tumors were characterized by malignant melanocytes that transitioned into neoplastic bone at the deep margins of the neoplasm. Immunohistochemical analysis revealed S100- and Melan-A-positive neoplastic cells adjacent to, and occasionally embedded within, an osteoid and chondroblastic matrix. Scattered clusters of neoplastic cells were also positive for osteocalcin. The findings indicate that in dogs, as in humans, neoplastic melanocytes have metaplastic potential ...


Anuran Susceptibilities To Ranaviruses: Role Of Species Identity, Exposure Route, And A Novel Virus Isolate., J. Hoverman, Matthew Gray, Debra Miller Dec 2009

Anuran Susceptibilities To Ranaviruses: Role Of Species Identity, Exposure Route, And A Novel Virus Isolate., J. Hoverman, Matthew Gray, Debra Miller

Debra L Miller

Ranaviruses are responsible for widespread amphibian die-offs, particularly with larval anurans. To understand the factors that may be contributing to the emergence of ranaviruses, we conducted 3 experiments that exposed 3 species of larval anurans to either endemic frog virus 3 (FV3) or an FV3-like isolate from a ranaculture facility. Our goals were to (1) determine the susceptibility of each species to each virus, (2) determine whether direct ingestion of virions or exposure to virions in a water bath were similarly lethal routes of transmission, and (3) quantify the effects of exposure duration on disease outcomes. We conducted our research ...


Pathology In Practice. Ranavirus Infection., M. Ruder, A. Allison, Debra Miller, M. Keel Dec 2009

Pathology In Practice. Ranavirus Infection., M. Ruder, A. Allison, Debra Miller, M. Keel

Debra L Miller

No abstract provided.


Differential Responses Of Postmetamorphic Amphibians To Cattle Grazing In Wetlands., E. Burton, Matthew Gray, A. Schumutzer, Debra Miller Dec 2008

Differential Responses Of Postmetamorphic Amphibians To Cattle Grazing In Wetlands., E. Burton, Matthew Gray, A. Schumutzer, Debra Miller

Debra L Miller

Global amphibian declines have been linked to various anthropogenic land uses. Recent studies have documented negative impacts of cropland agriculture and deforestation on amphibians; however, few have examined potential impacts of cattle grazing in wetlands on resident amphibians. Therefore, we measured differences in number of captures and body size of postmetamorphic amphibians, egg mass abundance, and shoreline vegetation structure and composition between 4 wetlands with direct cattle access and 4 wetlands from which cattle were excluded on the Cumberland Plateau in Tennessee, USA. We captured amphibians at wetlands from March to August 2005 and 2006 using pitfall traps. Number of ...


Pathologic Findings In Larval And Juvenile Anurans Inhabiting Farm Ponds In Tennessee, Usa., Debra Miller, Matthew Gray, S. Rajeev, A. Schmutzer, E. Burton, A. Merrill, C. Baldwin Dec 2008

Pathologic Findings In Larval And Juvenile Anurans Inhabiting Farm Ponds In Tennessee, Usa., Debra Miller, Matthew Gray, S. Rajeev, A. Schmutzer, E. Burton, A. Merrill, C. Baldwin

Debra L Miller

Amphibian populations are declining globally, yet general pathologic surveys for free-ranging amphibians are uncommon. Pathologic surveys are necessary to provide insight into the impacts of humans on emergence of pathogens in amphibian populations. During 2005, 104 American bullfrog (Rana catesbeiana) and 80 green frog (Rana clamitans) larvae and 40 green frog juveniles were collected from farm ponds in Tennessee, and complete necropsies were performed. Diagnostic testing included bacterial culture, virus testing, fecal parasite analysis, and histologic examination. Gross and histologic examination revealed that all individuals, except one bullfrog tadpole, could be classified as clinically normal. The clinically abnormal tadpole had ...


Hematology, Parasitology, And Serology Of Free-Ranging Coyotes (Canis Latrans) From South Carolina., Debra Miller, J. Schrecengos, A. Merrill, J. Kilgo, H. Ray, K. Miller, C. Baldwin Dec 2008

Hematology, Parasitology, And Serology Of Free-Ranging Coyotes (Canis Latrans) From South Carolina., Debra Miller, J. Schrecengos, A. Merrill, J. Kilgo, H. Ray, K. Miller, C. Baldwin

Debra L Miller

Blood and feces were collected from 34 adult (19 males, 15 females) and seven juvenile (three males, one female, three not reported) free-ranging coyotes (Canis latrans) on the US Department of Energy's Savannah River Site (South Carolina, USA). Significant (P<0.05) hematologic differences by sex were noted for red blood cell counts, hemoglobin, and hematocrit. Biochemical differences by sex occurred only for albumen (P<0.05). Twenty-one adults were antibody positive for at least one of four viruses: canine adenovirus type 1 (CAV-1; 68%), West Nile virus (WNV; 60%), Eastern equine encephalitis virus (EEEV; 38%), and Canine distemper ...


Pathologic Findings In Hatchling And Posthatchling Leatherback Sea Turtles (Dermochelys Coriacea) From Florida., Debra Miller, J. Wyneken, S. Rajeev, J. Perrault, D. Mader, J. Weege, C. Baldwin Dec 2008

Pathologic Findings In Hatchling And Posthatchling Leatherback Sea Turtles (Dermochelys Coriacea) From Florida., Debra Miller, J. Wyneken, S. Rajeev, J. Perrault, D. Mader, J. Weege, C. Baldwin

Debra L Miller

In an attempt to identify critical health issues affecting the survival of endangered leatherback sea turtles (Dermochelys coriacea), a prospective study was conducted in several dead-in-nest hatchlings and captive posthatchlings to examine pathologic changes and presence of pathogenic microorganisms. Numerous histopathologic changes were identified. Although bacterial etiologies were suspected in deaths of captive individuals, a single causative organism was not identified but rather, a mixed population of bacterial flora was cultured. Muscle degeneration observed in most samples implicates a potential environmental factor in species survival and needs future investigation.


Chytridiomycosis-Associated Mortality In A Ran Palustris Collected In Great Smoky Mountains National Park, Tennessee, Usa., M. Todd-Thompson, Debra Miller, P. Super, Matthew Gray Dec 2008

Chytridiomycosis-Associated Mortality In A Ran Palustris Collected In Great Smoky Mountains National Park, Tennessee, Usa., M. Todd-Thompson, Debra Miller, P. Super, Matthew Gray

Debra L Miller

No abstract provided.


Population Health Of Fallow Deer (Dama Dama) On Little St. Simons Island, Georgia, Usa., B. Morse, Debra Miller, K. Miller, C. Baldwin Dec 2008

Population Health Of Fallow Deer (Dama Dama) On Little St. Simons Island, Georgia, Usa., B. Morse, Debra Miller, K. Miller, C. Baldwin

Debra L Miller

Fallow deer (Dama dama) were introduced to Little St. Simons Island, Georgia, USA in the 1920s and thrive at high population densities, to the exclusion of white-tailed deer (Odocoileus virginina). The presence of introduced pathogens and parasites as a result of their introduction is currently unknown, as is the impact of native disease on the exotic fallow deer. Hunter-killed fallow deer from 2003-2005 were necropsied and surveyed for evidence of infectious disease, parasitic agents, and toxicologic parameters. Fallow deer were positive for antibodies to bovine virus diarrhea virus I and II, bluetongue virus, and bovine adenovirus. Twenty species of bacteria ...


Pcr Detection Of Ranavirus In Adult Anurans From The Louisville Zoological Garden., E. Driskell, Debra Miller, D. Miller, S. Swist, Z. Gyimesi Dec 2008

Pcr Detection Of Ranavirus In Adult Anurans From The Louisville Zoological Garden., E. Driskell, Debra Miller, D. Miller, S. Swist, Z. Gyimesi

Debra L Miller

Ranaviruses are known to cause mortality in a variety of anuran species and have the potential to significantly impact wild and captive frog populations. In this study, 16 captive frogs and toads from the Louisville Zoological Garden were examined for the presence of ranavirus; this group included 14 Cope's grey tree frogs (Hyla chrysoscelis), an American toad (Bufo americanus), and a southern toad (Bufo terrestris). All animals were wild caught and were evaluated via polymerase chain reaction (PCR), while animals that died were also assessed via histologic study to understand the role of ranaviral disease in these specimens. Of ...


Concurrent Infection With Ranavirus, Batrachochytrium Dendrobatidis, And Aeromonas In A Captive Anuran Colony., Debra Miller, S. Rajeev, M. Brookins, J. Cook, L. Whittington, C. Baldwin Dec 2007

Concurrent Infection With Ranavirus, Batrachochytrium Dendrobatidis, And Aeromonas In A Captive Anuran Colony., Debra Miller, S. Rajeev, M. Brookins, J. Cook, L. Whittington, C. Baldwin

Debra L Miller

Four species (Dendrobates auratus, Phyllobates terribilis, Pyxicephalus adspersus, and Rhacophorus dennysi) of captive anurans with a clinical history of lethargy and inappetence were found dead and were submitted for necropsy. Gross lesions included irregular patches of sloughed skin and rare dermal ulcerations. Histologic findings included epidermal proliferation that was most pronounced on the digits and that included intracytoplasmic chytrid organisms. Bacteria were often associated with the epidermal lesions. Intracytoplasmic inclusion bodies were observed in hepatocytes. Real-time polymerase chain reaction yielded positive results for both Ranavirus and Batrachochytrium dendrobatidis (Bd). Bacterial culture of internal organs yielded Aeromonas hydrophila. This is the ...


Fonsecaea Pedrosoi Skin Infection In A Dog., S. Rajeev, G. Clifton, C. Watson, Debra Miller Dec 2007

Fonsecaea Pedrosoi Skin Infection In A Dog., S. Rajeev, G. Clifton, C. Watson, Debra Miller

Debra L Miller

Fonsecaea pedrosoi is the most common fungal agent associated with human chromoblastomycosis. In the current study, a phaeohyphomycotic condition of the skin caused by Fonsecaea pedrosoi is described in a dog.


Impacts Of Cattle On Amphibian Larvae And The Aquatic Environment., A. Schumutzer, Matthew Gray, E. Burton, Debra Miller Dec 2007

Impacts Of Cattle On Amphibian Larvae And The Aquatic Environment., A. Schumutzer, Matthew Gray, E. Burton, Debra Miller

Debra L Miller

Agricultural practices such as cattle farming may have direct or indirect negative effects on larval amphibians by decreasing water quality through deposition of nitrogenous waste, causing eutrophication, and grazing shoreline vegetation that contributes to detrital cover and food. We sampled amphibian larvae on the Cumberland Plateau, Tennessee, U.S.A., twice per week, water quality twice per month and algal and detrital biomass once per month at seven wetlands (three cattle-access and four non-access) from March to August 2005 and 2006. In general, species richness and diversity of amphibian larvae were greater in wetlands without cattle. Mean relative abundance of ...


The Mature Spermatozoan., Debra Miller, E. Styer, S. Kita, M. Menchaca Dec 2006

The Mature Spermatozoan., Debra Miller, E. Styer, S. Kita, M. Menchaca

Debra L Miller

No abstract provided.