Journal of Wildlife Diseases最新文献_第5页

Using Multivariate Analyses to Explore Host-Pathogen Coevolution in Complex Trait Space. 利用多变量分析探索复杂性状空间中的宿主-病原体协同进化。

IF 1.2 4区农林科学

Journal of Wildlife Diseases Pub Date : 2025-07-01 DOI: 10.7589/JWD-D-24-00123

Rachel M Ruden, Amberleigh E Henschen, Marissa M Langager, Dana M Hawley, James S Adelman

{"title":"Using Multivariate Analyses to Explore Host-Pathogen Coevolution in Complex Trait Space.","authors":"Rachel M Ruden, Amberleigh E Henschen, Marissa M Langager, Dana M Hawley, James S Adelman","doi":"10.7589/JWD-D-24-00123","DOIUrl":"10.7589/JWD-D-24-00123","url":null,"abstract":"Lesion severity scores are often used to monitor individual health outcomes following the incursion of certain wildlife diseases. However, collapsing a complex trait such as pathology onto a single axis can mask critical information about host-pathogen interactions. In this study, we apply multivariate techniques (shape and community analyses) to explore potential patterns of coevolution in a well-studied wildlife disease system: House Finches (Haemorhous mexicanus) infected with Mycoplasma gallisepticum, a bacterium that causes conjunctival pathology that is visible and facilitates transmission. We captured hatch-year House Finches from two USA populations that differ in their history of pathogen exposure: a Virginia population that has experienced seasonal epizootics for >25 yr and a Hawaii population that is naïve to the pathogen. We then experimentally infected the birds with one of two isolates that varied in virulence. The Virginia birds showed milder distortions of the eye rim, reflected as shorter distances traveled through disease space, across isolates than did the Hawaii birds. Although birds expressed an overlapping suite of pathologic descriptors, the high-virulence isolate caused Virginia birds to express certain pathologies at different frequencies, leading to depauperate communities, compared with the Hawaii birds in which pathologies were expressed more evenly. Notably, eversion was expressed in nearly half of all Virginia eye-days (number of days an eye was sampled) with pathology in response to the high-virulence isolate despite relatively mild lesion severity scores. This may indicate that pathologies that can enhance host competence without compromising host fitness will be maintained and even selected for during host-pathogen coevolution, especially in wildlife populations trending toward disease tolerance.","PeriodicalId":17602,"journal":{"name":"Journal of Wildlife Diseases","volume":" ","pages":"609-618"},"PeriodicalIF":1.2,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144199546","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Pasteurella multocida Infections in Yellow-eyed Penguins (Hoiho; Megadyptes antipodes) in Otago, New Zealand: Case Series of Mortalities due to Avian Cholera. 黄眼企鹅的多杀性巴氏杆菌感染新西兰奥塔哥：禽霍乱死亡病例系列。

IF 1.2 4区农林科学

Journal of Wildlife Diseases Pub Date : 2025-07-01 DOI: 10.7589/JWD-D-24-00174

Harry S Taylor, Jonathan Foxwell, Ruy Jauregui, Trudi Webster, Mark Eames, Peter Bennett, Hendrik Schultz, Jim Watts, Lisa Argilla, Kate McInnes, John O'Connell, Stuart Hunter

{"title":"Pasteurella multocida Infections in Yellow-eyed Penguins (Hoiho; Megadyptes antipodes) in Otago, New Zealand: Case Series of Mortalities due to Avian Cholera.","authors":"Harry S Taylor, Jonathan Foxwell, Ruy Jauregui, Trudi Webster, Mark Eames, Peter Bennett, Hendrik Schultz, Jim Watts, Lisa Argilla, Kate McInnes, John O'Connell, Stuart Hunter","doi":"10.7589/JWD-D-24-00174","DOIUrl":"10.7589/JWD-D-24-00174","url":null,"abstract":"Yellow-eyed Penguins (Megadyptes antipodes; hoiho) are a unique, nationally endangered, and declining species endemic to New Zealand. Between 28 April 2023 and 28 February 2024, histopathologic examination found that six Yellow-eyed Penguins died from septicemia. A Pasteurella sp. was cultured from all six cases and confirmed as Pasteurella multocida in three cases by either MALDI-TOF (n=2) or genome sequencing (n=1). One isolate was confirmed as P. multocida type A:L3 by molecular techniques and genome sequencing. Pasteurella multocida is the causative agent of avian cholera; thus, finding P. multocida confirmed avian cholera as the cause of these deaths. A source for the bacterial infections could not be identified in these cases. Although avian cholera has been previously reported in other penguin species, to our knowledge, these are the first reported cases of P. multocida in Yellow-eyed Penguins. Yellow-eyed Penguins do not nest in dense colonies, and direct contact between birds outside of breeding pairs is irregular, making this case series an unusual presentation for avian cholera. The loss of six individuals, including three of breeding age, will have a significant impact on the mainland Yellow-eyed Penguin population, and the potential for further losses to avian cholera cannot be discounted. This case series illustrates the benefits of multiagency collaboration in monitoring for, and investigation of, potentially new and emerging diseases in threatened species.","PeriodicalId":17602,"journal":{"name":"Journal of Wildlife Diseases","volume":" ","pages":"736-742"},"PeriodicalIF":1.2,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143971086","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Highly Pathogenic Avian Influenza in Northern Fulmars (Fulmarus glacialis) in the Netherlands. 荷兰北部冰川狐猴的高致病性禽流感。

IF 1.2 4区农林科学

Journal of Wildlife Diseases Pub Date : 2025-07-01 DOI: 10.7589/JWD-D-24-00176

Valentina Caliendo, Beatriz Bellido Martin, Ron A M Fouchier, Oanh Vuong, Judith M A van den Brand, Mardik Leopold, Susanne Kühn

引用次数: 0

Infectious Diseases in European Brown Hares (Lepus europaeus) Found Dead or Moribund in the Netherlands. 在荷兰发现死亡或垂死的欧洲褐兔（Lepus europaeus）传染病。

IF 1.2 4区农林科学

Journal of Wildlife Diseases Pub Date : 2025-07-01 DOI: 10.7589/JWD-D-24-00116

Sara R Wijburg, Margriet G E Montizaan, Els M Broens, Andrea Gröne, Hein Sprong, Miriam Maas

{"title":"Infectious Diseases in European Brown Hares (Lepus europaeus) Found Dead or Moribund in the Netherlands.","authors":"Sara R Wijburg, Margriet G E Montizaan, Els M Broens, Andrea Gröne, Hein Sprong, Miriam Maas","doi":"10.7589/JWD-D-24-00116","DOIUrl":"10.7589/JWD-D-24-00116","url":null,"abstract":"Information on pathogens, including zoonotic agents, in European brown hares (Lepus europaeus) in the Netherlands is lacking. In this paper, we provide an overview of the most common pathogens found in hares in the Netherlands. Specifically, we assessed whether land use and climatic factors influence the occurrence of a frequently detected pathogen in hares, that is, Yersinia spp., and determined whether there are changes in the occurrence of pathogens in hares between the periods 1966-77 and 2009-21. Postmortem examinations were available for 513 hares from 2009 to 2021 and for 757 hares from 1966 to 1977. Descriptive analysis was performed on these data, assessing hare metadata, pathology, reasons for submission, land use surrounding the location of recovery, and seasonality. A logistic mixed modeling approach was used to identify predictors for the presence of Yersinia spp. In both periods, hares were identified as competent hosts for several pathogens, including zoonotic agents. Yersinia spp. was the most frequently identified pathogen (recent period, 12.1%; historic period, 25.1%). Between 2009 and 2021, Yersinia spp. presence was positively associated with the proportion of agricultural land use and negatively associated with the mean daily minimum temperature. The results presented herein provide a better understanding of pathogens circulating in free-ranging hares in the Netherlands and are relevant to hare health and public health and for wildlife managers and future surveillance strategies. Furthermore, the results emphasize the inherent difficulties associated with retrospective analyses of these types of data.","PeriodicalId":17602,"journal":{"name":"Journal of Wildlife Diseases","volume":" ","pages":"642-653"},"PeriodicalIF":1.2,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143989076","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Prevalence and Pathology Associated with Sarcocystis spp. in Raptors in Tennessee, USA. 美国田纳西州猛禽中肌囊虫病的患病率和病理学。

IF 1.2 4区农林科学

Journal of Wildlife Diseases Pub Date : 2025-07-01 DOI: 10.7589/JWD-D-24-00130

Eliza Baker, Lani Bower, Richard Gerhold, Debra Miller

{"title":"Prevalence and Pathology Associated with Sarcocystis spp. in Raptors in Tennessee, USA.","authors":"Eliza Baker, Lani Bower, Richard Gerhold, Debra Miller","doi":"10.7589/JWD-D-24-00130","DOIUrl":"10.7589/JWD-D-24-00130","url":null,"abstract":"Raptors may serve as both intermediate and definitive hosts for Sarcocystis spp. Past research has documented fatal encephalitis in raptors caused by various Sarcocystis spp., whereas other surveys have found a high prevalence of tissue cysts without evidence of disease. Little is known about the prevalence of Sarcocystis in raptors in the eastern USA. The aim of this study was to determine the occurrence of tissue cysts and histopathologic changes associated with Sarcocystis spp. infection in raptors in eastern Tennessee. Tissues of 33 raptors from Tennessee, USA, were assessed with histopathologic examination. Cysts consistent with Sarcocystis spp. were present in the heart, skeletal, or tracheal muscle of 11 (33%) raptors, without any associated inflammation. Tissues from histopathologic-positive raptors were then tested with PCR targeting of the 18S rRNA gene of Sarcocystis. Sequence analysis of PCR products revealed that six raptors had sequences most similar to Sarcocystis falcatula, and two had sequences most similar to Sarcocystis halieti. In addition, one S. falcatula-positive Bald Eagle (Haliaeetus leucocephalus) had lymphoplasmacytic meningoencephalitis and was positive via immunohistochemistry for eastern equine encephalitis virus. Our study supports findings in other geographic regions that raptors commonly serve as hosts for Sarcocystis spp. without evidence of associated disease.","PeriodicalId":17602,"journal":{"name":"Journal of Wildlife Diseases","volume":" ","pages":"700-707"},"PeriodicalIF":1.2,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144008866","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Rabbit Hemorrhagic Disease Virus 2 Experimental Infection in Snowshoe Hares (Lepus americanus). 兔出血症病毒2型在美洲雪靴兔中的实验感染。

IF 1.2 4区农林科学

Journal of Wildlife Diseases Pub Date : 2025-07-01 DOI: 10.7589/JWD-D-24-00141

Angela M Bosco-Lauth, Stephanie M Porter, Rachel M Maison, Karen A Fox, Jeffrey M Marano, Jacob S Ivan, Karen Griffin, Marissa Quilici, J Jeffrey Root

{"title":"Rabbit Hemorrhagic Disease Virus 2 Experimental Infection in Snowshoe Hares (Lepus americanus).","authors":"Angela M Bosco-Lauth, Stephanie M Porter, Rachel M Maison, Karen A Fox, Jeffrey M Marano, Jacob S Ivan, Karen Griffin, Marissa Quilici, J Jeffrey Root","doi":"10.7589/JWD-D-24-00141","DOIUrl":"10.7589/JWD-D-24-00141","url":null,"abstract":"Rabbit hemorrhagic disease virus 2 (RHDV2) is an emerging virus of lagomorphs, with an extremely high mortality rate. Outbreaks of RHDV2 have been reported in domestic and wild European rabbits (Oryctolagus cuniculus) and wild lagomorphs globally, with the recent emergence and establishment of RHDV2 in the USA in 2018 and 2020, respectively. Here, we describe experimental infections in snowshoe hares (Lepus americanus), a species of conservation interest in the US. In this pilot study that took place January-April 2022, six hares were orally exposed to infectious virus and monitored for clinical signs and viral shedding for 2 wk. Snowshoe hares were relatively resistant to disease, with no hares succumbing to lethal infection during the experimental time frame (14 d) and animals showing histopathologic evidence of recovery from hepatic injury. Liver samples collected postmortem and pooled fecal samples collected daily were PCR positive for RHDV2, indicating that the hares were indeed infected and shedding viral particles. The majority of hares (5/6) seroconverted by the end of the study. These findings suggest that snowshoe hares are susceptible to RHDV2 and can potentially shed virus onto the landscape, but are less likely to be affected clinically than certain other species of lagomorph.","PeriodicalId":17602,"journal":{"name":"Journal of Wildlife Diseases","volume":" ","pages":"674-684"},"PeriodicalIF":1.2,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144078676","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Feline Leukemia Virus in Free-ranging Neotropical Wild Felids and in Domestic Cats Found Inside Protected Areas within Rio Grande do Sul, Brazil. 巴西南巴西大德州保护区内自由放养的新热带野生猫科动物和家猫的白血病病毒。

IF 1.2 4区农林科学

Journal of Wildlife Diseases Pub Date : 2025-07-01 DOI: 10.7589/JWD-D-24-00136

José Reck, Greice Zorzato Gonchoroski, Lauren Santos de Mello, Vinicius Proença da Silveira, Vagner Ricardo Lunge, Carlos Benhur Kasper, Márcia Jardim, Tatiane C Trigo

{"title":"Feline Leukemia Virus in Free-ranging Neotropical Wild Felids and in Domestic Cats Found Inside Protected Areas within Rio Grande do Sul, Brazil.","authors":"José Reck, Greice Zorzato Gonchoroski, Lauren Santos de Mello, Vinicius Proença da Silveira, Vagner Ricardo Lunge, Carlos Benhur Kasper, Márcia Jardim, Tatiane C Trigo","doi":"10.7589/JWD-D-24-00136","DOIUrl":"10.7589/JWD-D-24-00136","url":null,"abstract":"Feline leukemia virus (FeLV) and feline immunodeficiency virus (FIV) are retroviruses that cause severe diseases in domestic cats. Recently, they have emerged as a concern for wild felids. The aim of this study was to evaluate the exposure to feline retroviruses in free-ranging Neotropical wild felids from southern Brazil. A total of 48 road-killed wild felids belonging to three species were sampled: Geoffroy's cat (Leopardus geoffroyi), margay (Leopardus wiedii), and Southern tiger cat (Leopardus guttulus). In addition, 28 domestic cats found inside protected areas were investigated. Both the wild and domestic felids were tested for the presence of FeLV and FIV with lateral flow immunoassay (LFA) and molecular methods. Three wild felids (two Geoffroy's cats and one margay) were positive to FeLV by LFA (antigen), PCR (proviral DNA), and quantitative reverse-transcription PCR (viral RNA). From the 28 free-roaming domestic cats sampled inside protected areas, 10 (35%) were positive for FeLV. None of the domestic or wild felids were positive for FIV. In addition to the occurrence of FeLV in two species of free-ranging Neotropical felids, FeLV-positive domestic cats appear to be relatively common in protected areas from southern Brazil, posing an important risk of FeLV transmission to threatened wild felids inside those areas.","PeriodicalId":17602,"journal":{"name":"Journal of Wildlife Diseases","volume":" ","pages":"708-713"},"PeriodicalIF":1.2,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144111144","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Seroprevalence of Toxoplasma gondii in Giant Anteaters (Myrmecophaga tridactyla) in Mato Grosso Do Sul, Brazil. 巴西南马托格罗索州巨食蚁兽中刚地弓形虫血清流行病学研究。

IF 1.2 4区农林科学

Journal of Wildlife Diseases Pub Date : 2025-07-01 DOI: 10.7589/JWD-D-24-00151

Mariana Pereira Alexandre, Camila Vêber de Souza, Letícia da Silva Ferreira Ribeiro Mathias, Raffaela Nogueira Bernardo, Vinícius Oliveira Batista, Leila Sabrina Ullmann, Débora Regina Yogui, Mario Henrique Alves, Danilo Kluyber, Mayara Grego Caiaffa, Arnaud Leonard Jean Desbiez, Roberta Lemos Freire, Rafaela Maria Boson Jurkevicz, Luiz Daniel de Barros, Juliana Arena Galhardo

{"title":"Seroprevalence of Toxoplasma gondii in Giant Anteaters (Myrmecophaga tridactyla) in Mato Grosso Do Sul, Brazil.","authors":"Mariana Pereira Alexandre, Camila Vêber de Souza, Letícia da Silva Ferreira Ribeiro Mathias, Raffaela Nogueira Bernardo, Vinícius Oliveira Batista, Leila Sabrina Ullmann, Débora Regina Yogui, Mario Henrique Alves, Danilo Kluyber, Mayara Grego Caiaffa, Arnaud Leonard Jean Desbiez, Roberta Lemos Freire, Rafaela Maria Boson Jurkevicz, Luiz Daniel de Barros, Juliana Arena Galhardo","doi":"10.7589/JWD-D-24-00151","DOIUrl":"10.7589/JWD-D-24-00151","url":null,"abstract":"Surveillance is an important component of One Health; however, disease surveillance in wild animals is hindered by challenges in obtaining and preserving adequate biological samples from free-ranging animals. The protozoan Toxoplasma gondii is the etiologic agent causing toxoplasmosis, a worldwide zoonosis with a high prevalence in Brazil. There is limited literature on toxoplasmosis in giant anteaters (Myrmecophaga tridactyla); therefore, this study aimed to evaluate the seroprevalence of T. gondii in M. tridactyla from midwest Brazil. Blood samples from 71 free-ranging animals from the Cerrado (n=65) and Pantanal (n=6) biomes in Mato Grosso do Sul state, were collected from 2016 to 2021, as part of Wild Animals Conservation Institute (ICAS) studies. A modified agglutination test was used to detect anti-T. gondii antibodies. Overall, 62% (44/71) of free-ranging anteaters tested positive, with titers ranging from 16 to 4,096, confirming exposure of giant anteaters in this area of Brazil to T. gondii. Anti-T. gondii antibodies were detected in anteaters from both the Pantanal wetland and Cerrado savanna biomes, indicating the presence of T. gondii in both.","PeriodicalId":17602,"journal":{"name":"Journal of Wildlife Diseases","volume":" ","pages":"719-725"},"PeriodicalIF":1.2,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144199545","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Mycoplasma bovis Outbreak and Maintenance of Subclinical Infections in An Exposed Cohort of Juvenile American Bison (Bison bison). 暴露在美洲野牛幼崽群中的牛支原体爆发和亚临床感染的维持。

IF 1.2 4区农林科学

Journal of Wildlife Diseases Pub Date : 2025-07-01 DOI: 10.7589/JWD-D-24-00117

Danielle E Buttke, Katie Schwartz, Erin Schwalbe, Halcyon Killion, Kerry S Sondgeroth, Bryan S Kaplan, Jennifer L Malmberg

{"title":"Mycoplasma bovis Outbreak and Maintenance of Subclinical Infections in An Exposed Cohort of Juvenile American Bison (Bison bison).","authors":"Danielle E Buttke, Katie Schwartz, Erin Schwalbe, Halcyon Killion, Kerry S Sondgeroth, Bryan S Kaplan, Jennifer L Malmberg","doi":"10.7589/JWD-D-24-00117","DOIUrl":"10.7589/JWD-D-24-00117","url":null,"abstract":"The American bison (Bison bison) is an ecologically, economically, and culturally significant species that is exceptionally vulnerable to disease caused by Mycoplasma bovis. In contrast to livestock in which M. bovis is one of many infectious agents comprising the bovine respiratory disease complex, infection in bison is characterized by severe pneumonia and potential for systemic disease in the absence of coinfecting pathogens. In bison, morbidity and mortality are highest in adult cows, whereas calves and yearlings infrequently present with clinical disease. The infection dynamics of M. bovis in young bison exposed during an outbreak have not been fully characterized. Herein, we describe a severe outbreak of M. bovis in a closed, extensively managed herd from which we established a cohort of young bison for longitudinal observation, sampling, and testing. Our findings indicate that M. bovis can colonize the nasopharynx of calves and yearlings during an outbreak, often without causing apparent clinical signs. Although some animals cleared the infection during a 12-mo follow-up study, others remained PCR and culture positive, highlighting the potential for asymptomatic carriage in bison calves as a source of subsequent outbreaks. Using a paired swabbing approach, we show that sampling the superficial nasal cavity is adequate for detection of M. bovis during an outbreak. Over time, however, deep sampling of the nasopharynx is necessary to maximize detection of subclinical infections. Uncertainty in detection using PCR on nasal swab samples can complicate herd assessments and limit the ability to fully assess risk. This study emphasizes the difficulty of identifying chronic carriers following an outbreak and underscores the need for further research to inform M. bovis management and minimize risk in the sensitive and iconic American bison.","PeriodicalId":17602,"journal":{"name":"Journal of Wildlife Diseases","volume":" ","pages":"563-573"},"PeriodicalIF":1.2,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144007300","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Pathologic and Parasitologic Findings of Free-Ranging Yacare Caiman (Caiman yacare) in the Brazilian Pantanal. 巴西潘塔纳尔地区自由放养凯门鳄的病理学和寄生虫学研究。

IF 1.2 4区农林科学

Journal of Wildlife Diseases Pub Date : 2025-07-01 DOI: 10.7589/JWD-D-24-00102

Leonardo L Gorza, Ellen C Oliveira, Sóstenes A C Marcelino, Yhuri C Nóbrega, Hudson A Pinto, Guilherme C Tavares, Marcelo P N Carvalho, Marcelo R D Santos, Marcos E Coutinho, Robert J Ossiboff, Felipe Pierezan

{"title":"Pathologic and Parasitologic Findings of Free-Ranging Yacare Caiman (Caiman yacare) in the Brazilian Pantanal.","authors":"Leonardo L Gorza, Ellen C Oliveira, Sóstenes A C Marcelino, Yhuri C Nóbrega, Hudson A Pinto, Guilherme C Tavares, Marcelo P N Carvalho, Marcelo R D Santos, Marcos E Coutinho, Robert J Ossiboff, Felipe Pierezan","doi":"10.7589/JWD-D-24-00102","DOIUrl":"10.7589/JWD-D-24-00102","url":null,"abstract":"Periods of drought have been observed in the Brazilian Pantanal for several decades, typically occurring from May to November. These droughts impact the conservation of thousands of species, including the yacare caiman (Caiman yacare). This study aimed to describe the pathologic and parasitologic findings from postmortem examinations of free-ranging yacare caimans to provide insights regarding the influence of extreme drought on the health of this species. In total, 13 caimans were necropsied, representing deaths during a period of extreme drought (October 2021, 12 individuals) and a period of typical rainfall (October 2022, 1 individual). The main lesions identified in the respiratory tract included pulmonary granulomas (10/13, 77%), tracheal granulomas (8/13, 61.6%), tracheal pentastomids (5/13, 38.5%), and pulmonary pentastomids (3/13, 23.1%). The main lesions identified in the gastrointestinal tract included lesions caused by helminthiasis (Nematoda and Acanthocephala: 10/13, 77%), granulomas (5/13, 38.5%,), and intestinal hemorrhage (2/13, 15.4%). Other findings included myocardial granulomas, bacterial endocarditis, and unidentified helminths within renal tubules. Five helminth species were morphologically identified: the intestinal acanthocephalan Polyacanthorhynchus rhopalorhynchus, the respiratory pentastomids Alofia platycephala and Leiperia gracilis, the gastric nematode Ortleppascaris alata, and the intestinal nematode Micropleura vazi. The increased number of reported deaths and the consistent identification of parasite-associated lesions in the necropsied caimans from 2021 suggests an association between extreme drought, parasite infections, and the health status of yacare caiman.","PeriodicalId":17602,"journal":{"name":"Journal of Wildlife Diseases","volume":" ","pages":"685-693"},"PeriodicalIF":1.2,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144127995","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0