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Isolation and Characterization of a Novel Alpha-Hemolytic Streptococcus spp. from the Oral Cavity and Blood of Septicemic Periparturient Immunodeficient Mice. 从败血症围产期免疫缺陷小鼠口腔和血液中分离和鉴定一种新型α溶血性链球菌。
IF 0.8 4区 农林科学
Comparative medicine Pub Date : 2023-09-11 DOI: 10.30802/AALAS-CM-23-000020
Amy Funk, Qidong Jia, Laura Janke, Ashley Crawford, Amy Iverson, Jason Rosch, Joseph Emmons, Chandra Savage, Heather Glasgow, Randall Hayden, Elisa Margolis, Harshan Pisharath
{"title":"Isolation and Characterization of a Novel Alpha-Hemolytic Streptococcus spp. from the Oral Cavity and Blood of Septicemic Periparturient Immunodeficient Mice.","authors":"Amy Funk,&nbsp;Qidong Jia,&nbsp;Laura Janke,&nbsp;Ashley Crawford,&nbsp;Amy Iverson,&nbsp;Jason Rosch,&nbsp;Joseph Emmons,&nbsp;Chandra Savage,&nbsp;Heather Glasgow,&nbsp;Randall Hayden,&nbsp;Elisa Margolis,&nbsp;Harshan Pisharath","doi":"10.30802/AALAS-CM-23-000020","DOIUrl":"https://doi.org/10.30802/AALAS-CM-23-000020","url":null,"abstract":"<p><p>MISTRG is an immunodeficient mouse strain that expresses multiple human cytokines that support hematopoietic stem cell maintenance and myelopoiesis. While establishing a breeding colony of MISTRG mice in a dedicated barrier room, 6 cases of death or disease occurred in pregnant or postpartum mice. Clinically, this manifested as hunched posture, dyspnea, and 1 case of emaciation with ataxia. Pathologic analysis of 7 mice revealed multisystemic necrosuppurative inflammation variably affecting the uterus and placenta, joints, meninges, inner and middle ears, kidneys, and small intestine. Bacteria cultured from the blood of septic mice were identified with 89% probability by the Vitek 2 identification system as Streptococcus sanguinuswith atypical biochemical parameters; the API 20E/NE system fully differentiated the isolates as a novel Streptococcusspecies. MALDI Biotyper-based mass spectrometry also indicated that the phenotype represented a novel Streptococcusspp. Sequencing revealed that the full-length 16S rRNA gene identity was below 97% with known Streptococcus species, including the 2 closest species Streptococcus acidominimus and Streptococcus azizii. We propose the name Streptococcus murisepticum spp. nov to our novel isolates. All male mice in this colony remained healthy despite their association with diseased female mice. Overall, 19% of the colony carried the novel Streptococcus in their oral cavity, but it could not be detected in feces. The organism was sensitive to amoxicillin, which was administered via drinking water throughout pregnancy and weaning to establish a colony of pathogen-negative future breeders. The colony remained disease-free and culture-negative for Streptococcus murisepticum spp. nov after treatment with amoxicillin. We suspect that oral colonization of MISTRG mice with the novel Streptococcus species and its associated unique pathology in periparturient mice is potentially the principal cause of loss of this strain at several institutions. Therefore, screening the oral cavity for α-hemolytic streptococci followed by targeted antibiotic treatment may be necessary when establishing MISTRG and allied immunodeficient mouse strains.</p>","PeriodicalId":10659,"journal":{"name":"Comparative medicine","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2023-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10563927","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
Polyomavirus-associated Disseminated T-cell Lymphoma in a Colony of Zebra Finches (Taeniopygia guttata). 斑胸草雀(Taeniopygia guttata)群体中多瘤病毒相关的播散性t细胞淋巴瘤
IF 0.8 4区 农林科学
Comparative medicine Pub Date : 2023-09-11 DOI: 10.30802/AALAS-CM-23-000011
Katherine A Shuster, Tzushan S Yang, Kate T Snyder, Nicole Creanza, Patrick K Mitchell, Laura B Goodman, Jennifer K Grenier, Nicholas M Tataryn, Lauren E Himmel, Katherine N Gibson-Corley
{"title":"Polyomavirus-associated Disseminated T-cell Lymphoma in a Colony of Zebra Finches (Taeniopygia guttata).","authors":"Katherine A Shuster,&nbsp;Tzushan S Yang,&nbsp;Kate T Snyder,&nbsp;Nicole Creanza,&nbsp;Patrick K Mitchell,&nbsp;Laura B Goodman,&nbsp;Jennifer K Grenier,&nbsp;Nicholas M Tataryn,&nbsp;Lauren E Himmel,&nbsp;Katherine N Gibson-Corley","doi":"10.30802/AALAS-CM-23-000011","DOIUrl":"https://doi.org/10.30802/AALAS-CM-23-000011","url":null,"abstract":"<p><p>\u0000 <b>Four zebra finches in a closed research colony presented with variable clinical signs, including masses, skin lesions,shivering, and/or ruffled feathers. These birds were not responsive to treatment efforts; 3 died and one was euthanized. All4 were submitted for necropsy to determine the cause of the clinical signs. Gross necropsy and histopathologic findings fromall birds resulted in a diagnosis of round cell neoplasia in multiple organs, including the skin, liver, kidney, and reproductivetract, with intranuclear inclusion bodies in the neoplastic cells. In all 4 cases, immunohistochemical staining showed strongimmunoreactivity for CD3 in 70% to 80% of the neoplastic round cells, with a relatively small subset that were immunopositivefor Pax5. These findings supported a diagnosis of T-cell lymphoma. Frozen liver tissue from one case was submittedfor next-generation sequencing (NGS), which revealed viral RNA with 100% sequence homology to canary polyomavirusstrain 34639 that had originally been identified in a European goldfinch. Formalin-fixed paraffin-embedded scrolls fromanother case were also submitted for NGS, which revealed viral RNA with 97.2% sequence homology to canary polyomavirusstrain 37273 that had originally been identified in a canary. To localize the virus in situ, RNAscope hybridizationwas performed using a probe designed to target the VP1 gene of the sequenced virus in frozen liver tissue. In all 4 cases,disseminated and robust hybridization signals were detected in neoplastic cells. These findings indicate that polyomaviruseshave the potential to be oncogenic in zebra finches.</b>\u0000 </p>","PeriodicalId":10659,"journal":{"name":"Comparative medicine","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2023-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10653388","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
Seasonal Variation of Laboratory Animals as a Consideration for Research Reproducibility. 实验室动物的季节变化作为研究再现性的考虑因素。
IF 0.8 4区 农林科学
Comparative medicine Pub Date : 2023-08-27 DOI: 10.30802/AALAS-CM-23-000033
Mark A Suckow, Noé Tirado-Muñiz
{"title":"Seasonal Variation of Laboratory Animals as a Consideration for Research Reproducibility.","authors":"Mark A Suckow, Noé Tirado-Muñiz","doi":"10.30802/AALAS-CM-23-000033","DOIUrl":"10.30802/AALAS-CM-23-000033","url":null,"abstract":"<p><p>Laboratory rodents are generally maintained under standardized conditions in order to control the effects of extrinsic factors on research. However, despite attempts to standardize conditions, variability can nonetheless confound efforts directed toward research reproducibility. Here we explore some of the existing literature on the potential impact of seasonal variability as an extrinsic factor that can potentially impact research results. We discuss the influence of seasonal changes in association with an internal clock mechanism that might account for such variation, noting that the mechanisms and interactions of seasonal and internal time-keeping remain largely undetermined. Finally, we speculate that seasonal changes experienced by personnel who handle animals may influence the animals in ways that result in physiologic and behavioral changes.</p>","PeriodicalId":10659,"journal":{"name":"Comparative medicine","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2023-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10702282/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10316296","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Assessment of Risperidone Toxicity in Zebrafish (Danio rerio) Embryos. 利培酮对斑马鱼胚胎毒性的评估。
IF 0.8 4区 农林科学
Comparative medicine Pub Date : 2023-08-27 Epub Date: 2023-08-03 DOI: 10.30802/AALAS-CM-22-000123
Hirla Costa Silva Fukushima, Ricardo Lacava Bailone, Ricardo Carneiro Borra
{"title":"Assessment of Risperidone Toxicity in Zebrafish (<i>Danio rerio</i>) Embryos.","authors":"Hirla Costa Silva Fukushima, Ricardo Lacava Bailone, Ricardo Carneiro Borra","doi":"10.30802/AALAS-CM-22-000123","DOIUrl":"10.30802/AALAS-CM-22-000123","url":null,"abstract":"<p><p>Risperidone is an antipsychotic medication used in the treatment of conditions like autism and schizophrenia. The goal of the current study was to examine the effects of risperidone in zebrafish embryos ( <i>Danio rerio</i> ) with regard to survival, development, and cardiac and neural systems. The results showed that concentrations above 100 μM were associated with deaths, teratogenic effects, and cardiotoxic and neurotoxic effects. The findings support the utility of zebrafish for toxicological screening studies.</p>","PeriodicalId":10659,"journal":{"name":"Comparative medicine","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2023-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10702279/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9934826","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Mitigation of Fibrosis after Myocardial Infarction in Rats by Using a Porcine Cholecyst Extracellular Matrix. 猪胆囊囊肿细胞外基质对大鼠心肌梗死后纤维化的缓解作用。
IF 0.8 4区 农林科学
Comparative medicine Pub Date : 2023-08-27 Epub Date: 2023-08-01 DOI: 10.30802/AALAS-CM-22-000097
Reshma S Nair, Praveen K Sobhan, Sachin J Shenoy, Mukund A Prabhu, Vikas Kumar, Surya Ramachandran, Thapasimuthu V Anilkumar
{"title":"Mitigation of Fibrosis after Myocardial Infarction in Rats by Using a Porcine Cholecyst Extracellular Matrix.","authors":"Reshma S Nair, Praveen K Sobhan, Sachin J Shenoy, Mukund A Prabhu, Vikas Kumar, Surya Ramachandran, Thapasimuthu V Anilkumar","doi":"10.30802/AALAS-CM-22-000097","DOIUrl":"10.30802/AALAS-CM-22-000097","url":null,"abstract":"<p><p>Fibrosis that occurs after nonfatal myocardial infarction (MI) is an irreversible reparative cardiac tissue remodeling process characterized by progressive deposition of highly cross-linked type I collagen. No currently available therapeutic strategy prevents or reverses MI-associated fibrotic scarring of myocardium. In this study, we used an epicardial graft prepared of porcine cholecystic extracellular matrix to treat experimental nonfatal MI in rats. Graft-assisted healing was characterized by reduced fibrosis, with scanty deposition of type I collagen. Histologically, the tissue response was associated with a favorable regenerative reaction predominated by CD4-positive helper T lymphocytes, enhanced angiogenesis, and infiltration of proliferating cells. These observations indicate that porcine cholecystic extracellular matrix delayed the fibrotic reaction and support its use as a potential biomaterial for mitigating fibrosis after MI. Delaying the progression of cardiac tissue remodeling may widen the therapeutic window for management of scarring after MI.</p>","PeriodicalId":10659,"journal":{"name":"Comparative medicine","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2023-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10702285/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10180179","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Expression of Testis-specific Serine/Threonine Kinases during the Reproductive and Nonreproductive Seasons and Their Localization in Mature Spermatozoa of Tree Shrews (Tupaia belangeri). 睾丸特异性丝氨酸/苏氨酸激酶在树鼩生殖和非生殖季节的表达及其在成熟精子中的定位。
IF 0.8 4区 农林科学
Comparative medicine Pub Date : 2023-08-27 Epub Date: 2023-08-07 DOI: 10.30802/AALAS-CM-23-000043
Xia Tan, Xin Zhang, Xiang Li, Minghua Yang, Yahui Li
{"title":"Expression of Testis-specific Serine/Threonine Kinases during the Reproductive and Nonreproductive Seasons and Their Localization in Mature Spermatozoa of Tree Shrews (<i>Tupaia belangeri</i>).","authors":"Xia Tan, Xin Zhang, Xiang Li, Minghua Yang, Yahui Li","doi":"10.30802/AALAS-CM-23-000043","DOIUrl":"10.30802/AALAS-CM-23-000043","url":null,"abstract":"<p><p>Tree shrews display obvious reproductive cycles, and sexually mature male tree shrews produce little or no sperm with extremely low motility during the nonreproductive season; the mechanism underlying this phenomenon remains unknown. Because testis-specific serine/threonine kinases (TSSK) are specifically expressed in the testis and male germ cells of mammals, we hypothesized that they may have an important role in spermatogenesis or sperm function regulation in tree shrews. In addition, the expression, distribution, subcellular localization, and dynamic changes of TSSK in tree shrew sperm are unclear. Here we show that during the reproductive season, the seminiferous tubules were significantly larger as compared with the nonreproductive season and contained mature sperm and other germ cells. The mRNA expression of <i>Tssk</i> genes in testis was significantly higher than that in other tissues, and the mRNA level in the testis during the reproductive season was significantly higher than that in nonreproductive season. In addition, the mRNA level of <i>Tssk3</i> in the testis and sperm was significantly higher than that of other members. Specifically, <i>Tssk1</i> mRNA was distributed in the acrosome and throughout the flagellum of tree shrew sperm, <i>Tssk2</i> was present in the acrosome, <i>Tssk3</i> was localized to postacrosomal region and relocated to the main part of the flagellum after capacitation, and <i>Tssk6</i> was distributed in the acrosome and postacrosomal region. These results indicate that the TSSK are important regulating reproductive function in tree shrews.</p>","PeriodicalId":10659,"journal":{"name":"Comparative medicine","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2023-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10702283/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9945306","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Evaluation of Uveitis Induced in Rats by a Type I Collagen Peptide as a Model for Childhood Arthritis-associated Uveitis. I型胶原肽作为儿童关节炎相关葡萄膜炎模型在大鼠中诱导的葡萄膜炎的评估。
IF 0.8 4区 农林科学
Comparative medicine Pub Date : 2023-08-27 DOI: 10.30802/AALAS-CM-22-000129
Stephanie C Osinchuk, Bruce H Grahn, Tracy D Wilson, Brooke N Thompson, David A Hart, Kim D Harrison, David Ml Cooper, Arash Panahifar, Alan M Rosenberg
{"title":"Evaluation of Uveitis Induced in Rats by a Type I Collagen Peptide as a Model for Childhood Arthritis-associated Uveitis.","authors":"Stephanie C Osinchuk, Bruce H Grahn, Tracy D Wilson, Brooke N Thompson, David A Hart, Kim D Harrison, David Ml Cooper, Arash Panahifar, Alan M Rosenberg","doi":"10.30802/AALAS-CM-22-000129","DOIUrl":"10.30802/AALAS-CM-22-000129","url":null,"abstract":"<p><p>Chronic asymptomatic and acute symptomatic anterior uveitis are forms of ocular inflammation associated with juvenile idiopathic arthritis (JIA) Chronic JIA-associated uveitis is characterized by young age of onset, female predilection, oligoarthritis, and antinuclear antibody (ANA) positivity. Acute JIA-associated uveitis predominantly affects older male juveniles who also develop enthesitis. A type I collagen-derived peptide (melanin-associated antigen [MAA]) induces anterior uveitis in rodents. In this study, we evaluated MAA-induced uveitis in rats as a potential model for JIA-uveitis. We characterized MAA-induced uveitis by assessing its relationship to age and sex; tracking the occurrence of arthritis, enthesitis, and ANA positivity; and measuring vitreous fluid inflammatory biomarkers. Juvenile and adult and male and female Lewis rats (<i>Rattus norvegicus</i>) were inoculated with MAA. Slit-lamp biomicroscopy, indirect ophthalmoscopy, and joint examinations were performed 3 times weekly. Rats were euthanized at 4 wk after MAA inoculation, and plasma ANA testing, vitreous inflammatory biomarker assays, and globe histopathology assessments were conducted. Uveitis, arthritis, ANA status, levels of inflammatory biomarkers, histopathology, and joint tomographic images were assessed in relation to age and sex and compared with nonuveitic controls. All MAA-immunized rats developed uveitis characterized by anterior chamber fibrin, iridal vessel dilation, and miosis, and uveal and choroidal lymphocytic infiltration. Levels of the vitreous fluid biomarker CCL5 were higher in uveitic rats compared with control rats. Time to uveitis onset, clinical uveitis scores, and biomarker levels did not differ based on age or sex. None of the MAA-exposed rats had arthritis, enthesitis, or ANA. None of the rats inoculated with MAA that had been treated with matrix metallopeptidase 1 had clinical, histologic, or immunohistochemical evidence of ocular inflammation. In contrast to JIA-associated uveitis in humans, MAA-induced uveitis in rats is not associated with age or sex predilections and MAA is not arthritogenic.</p>","PeriodicalId":10659,"journal":{"name":"Comparative medicine","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2023-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10702287/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9945302","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Dietary Linoleic Acid: An Omega-6 Fatty Acid Essential for Liver Regeneration in Buffalo Rats. 膳食亚油酸:水牛大鼠肝脏再生所必需的Omega-6脂肪酸。
IF 0.8 4区 农林科学
Comparative medicine Pub Date : 2023-08-27 Epub Date: 2023-08-31 DOI: 10.30802/AALAS-CM-23-000004
Robert T Dauchy, Leonard A Sauer, David E Blask
{"title":"Dietary Linoleic Acid: An Omega-6 Fatty Acid Essential for Liver Regeneration in Buffalo Rats.","authors":"Robert T Dauchy, Leonard A Sauer, David E Blask","doi":"10.30802/AALAS-CM-23-000004","DOIUrl":"10.30802/AALAS-CM-23-000004","url":null,"abstract":"<p><p>Rodents are currently the most common animals used for hepatic surgical resection studies that investigate liver regeneration, chronic liver disease, acute liver failure, hepatic metastasis, hepatic function, and hepatic cancer. Our previous work has shown that dietary consumption of linoleic acid (LA) stimulates the growth of rodent and human tumors in vivo. Here we compared 3 diets - a 5% corn oil diet (control), a diet deficient in essential fatty acids (EFAD), and an EFAD supplemented with LA in amounts equal to those in the control diet (EFAD+LA). We hypothesized that consumption of the LA provided in the EFAD+LA diet would elevate plasma levels of LA and stimulate regeneration in rats after a 70% hepatectomy (HPX), and that regeneration would not occur in the EFAD rats. Each diet group was comprised of 30 male and 30 female Buffalo rats (BUFF/CrCrl). Rats were fed one of the 3 diets and water ad libitum. After 8 wk on the assigned diet, rats were underwent a 70% HPX. On days 4 and 21 after HPX, 30 male and 30 female rats from each diet group were anesthetized for in vivo study and then were euthanized for tissue collection. For the in vivo study, arterial and venous blood samples were collected from the liver. LA-, glucose-, and O₂ -uptake, and lactate- and CO₂ -output were significantly higher in LA-replete rats as compared with LA-deficient rats. After a 70% HPX, the remaining liver mass in control and EFAD+LA groups had doubled at day 4, reaching 60% of the original total weight, and had regenerated completely at day 21. However, no regeneration occurred in the EFAD group. At day 4 the portions of livers removed from the control and EFAD+LA groups had significantly higher content of LA, protein, cAMP, and DNA as compared with their livers on day 21. [³ H]thymidine incorporation into liver DNA was significantly higher in the 2 LA-replete groups, with male values greater than female values, as compared with LA-deficient group. These data indicate that liver regeneration after HPX is dependent on dietary LA. Understanding the mechanisms of LA-dependent liver regeneration in rats supports our current efforts to enhance successful surgical resection therapies in humans.</p>","PeriodicalId":10659,"journal":{"name":"Comparative medicine","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2023-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10702281/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10131540","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Exclusion of Horizontal and Vertical Transmission as Major Sources of Trypanosoma Cruzi Infections in a Breeding Colony of Rhesus Macaques (Macaca Mulatta). 在猕猴繁殖群中排除水平和垂直传播作为克氏锥虫感染的主要来源。
IF 0.8 4区 农林科学
Comparative medicine Pub Date : 2023-06-01 Epub Date: 2023-06-02 DOI: 10.30802/AALAS-CM-23-000005
Whitney M Kiehl, Carolyn L Hodo, Gabriel L Hamer, Sarah A Hamer, Gregory K Wilkerson
{"title":"Exclusion of Horizontal and Vertical Transmission as Major Sources of <i>Trypanosoma Cruzi</i> Infections in a Breeding Colony of Rhesus Macaques (<i>Macaca Mulatta</i>).","authors":"Whitney M Kiehl, Carolyn L Hodo, Gabriel L Hamer, Sarah A Hamer, Gregory K Wilkerson","doi":"10.30802/AALAS-CM-23-000005","DOIUrl":"10.30802/AALAS-CM-23-000005","url":null,"abstract":"<p><p>The vector-borne protozoal parasite <i>Trypanosoma cruzi</i> causes Chagas disease in humans and animals. This parasite is endemic to the southern United States where outdoor-housed NHP at biomedical facilities are at risk of infection. In addi- tion to the direct morbidity caused by <i>T. cruzi</i>, infected animals are of limited biomedical research use because infections can produce confounding pathophysiologic changes even in animals with no clinical disease. In part due to concerns for direct <i>T. cruzi</i> transmission between animals, infected NHP at some institutions have been culled, removed, or otherwise isolated from uninfected animal populations. However, data that document horizontal or vertical transmission in captive NHP in the United States are not available. To evaluate the potential for inter-animal transmission and to identify environmental factors that affect the distribution of new infections in NHPs, we conducted a retrospective epidemiologic study of a rhesus macaque ( <i>Macaca mulatta</i> ) breeding colony in south Texas. We used archived biologic samples and husbandry records to identify the time and location of macaque seroconversion. These data were used to perform a spatial analysis of how geographic location and animal associations affected the spread of disease and to infer the importance of horizontal or vertical routes of transmission. The majority of <i>T. cruzi</i> infections were spatially clustered, suggesting that environmental factors promoted vector exposure in various areas of the facility. Although we cannot not rule out horizontal transmission, our data suggest that horizontal transmission was not a critical route for spread for the disease. Vertical transmission was not a contributing factor in this colony. In conclusion, our findings suggest that local triatome vectors were the major source of <i>T. cruzi</i> infections in captive macaques in our colony. Therefore, limiting contact with vectors, rather than segregation of infected macaques, is a key strategy for disease prevention at institutions that house macaques outdoors in the southern United States.</p>","PeriodicalId":10659,"journal":{"name":"Comparative medicine","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10290485/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10064704","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Trends and Treatment Approaches for Complications in Neuroscience Experiments with Monkey Species. 猴类神经科学实验并发症的发展趋势及治疗方法。
IF 1.3 4区 农林科学
Comparative medicine Pub Date : 2023-06-01 Epub Date: 2023-05-19 DOI: 10.30802/AALAS-CM-22-000079
Aarti Kishore Jain, Ginger Tansey, Renée Hartig, Anna S Mitchell, Michele A Basso
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