cats

  • DOI:
    文章类型: Journal Article
    UNASSIGNED: Assessing effectiveness of circular (CM) and linear (LM) scrub methods using 3 different combinations of chlorhexidine in surgical field antisepsis in cats.
    UNASSIGNED: Surgical field antisepsis was applied with 2 scrub methods (CM and LM) and 3 different chlorhexidine combinations (A1, A2, and A3) in 51 female cats undergoing ovariectomy. Sterile swabs collected from the surgical field pre- and post-antisepsis were inoculated in the laboratory and colony-forming units (CFU/mL) were quantified.
    UNASSIGNED: Following the application of antisepsis, the number of positive samples decreased in all groups (P < 0.05) when using both CM and LM, except for CM in the A1 group (P = 0.063). The CFU/mL counts also decreased after antisepsis with both CM and LM in all groups (P < 0.05). A high reduction in CFU/mL counts was observed after antisepsis with both CM and LM in all groups, but no significant differences were observed between the 2 scrub methods (P > 0.05).
    UNASSIGNED: Surgical field antisepsis in cats with CM and LM scrub methods, using 2% chlorhexidine combined with 70% ethyl or 70% isopropyl alcohol, or 1% chlorhexidine combined with 70% ethyl alcohol, can effectively reduce the bacterial load on the skin.
    Efficacité de deux méthodes de désinfection avec différentes combinaisons de chlorhexidine pour l’antisepsie du champ opératoire chez le chat.
    UNASSIGNED: Évaluation de l’efficacité des méthodes de désinfection par mouvements circulaires (CM) et linéaires (LM) utilisant 3 combinaisons différentes de chlorhexidine dans l’antisepsie du champ opératoire chez le chat.
    UNASSIGNED: Une antisepsie chirurgicale sur le terrain a été appliquée avec 2 méthodes de désinfection (CM et LM) et 3 combinaisons différentes de chlorhexidine (A1, A2 et A3) chez 51 chattes subissant une ovariectomie. Des écouvillons stériles prélevés sur le champ opératoire avant et après l’antisepsie ont été inoculés en laboratoire et les unités formant des colonies (UFC/mL) ont été quantifiées.
    UNASSIGNED: À la suite de l’application de l’antisepsie, le nombre d’échantillons positifs a diminué dans tous les groupes (P < 0,05) lors de l’utilisation à la fois de CM et de LM, à l’exception du CM dans le groupe A1 (P = 0,063). Le nombre d’UFC/mL a également diminué après antisepsie avec CM et LM dans tous les groupes (P < 0,05). Une forte réduction du nombre d’UFC/mL a été observée après antisepsie avec CM et LM dans tous les groupes, mais aucune différence significative n’a été observée entre les 2 méthodes de désinfection (P > 0,05).
    UNASSIGNED: L’antisepsie chirurgicale sur le terrain chez les chats avec les méthodes de désinfection CM et LM, utilisant 2 % de chlorhexidine combinée à 70 % d’alcool éthylique ou 70 % d’alcool isopropylique, ou 1 % de chlorhexidine combinée à 70 % d’alcool éthylique, peut réduire efficacement la charge bactérienne sur la peau.(Traduit par Dr Serge Messier).
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  • DOI:
    文章类型: Case Reports
    A 7-year-old spayed female domestic shorthair cat was presented for evaluation of a large-volume abdominal space-occupying lesion. A computed tomography angiography examination detected a round retroperitoneal mass, in contact with the large abdominal vessels, characterized by an external hyperattenuating capsule and a larger hypoattenuating center. The capsule was soft-tissue attenuating with marked heterogenous contrast enhancement. The center was hypoattenuating pre- and post-contrast administration. The mass displaced both kidneys laterally and the descendent colon ventrally. The mesenteric veins and both phrenicoabdominal veins were markedly increased in diameter. However, the adrenals were not involved. On the excretory phase, no contrast enhancement was observed in either ureter, except for the proximal tract of the right ureter. At laparotomy, both ureters entered the mass that was adherent to the great abdominal vessels. The cytological diagnosis was retroperitoneal extra-adrenal paraganglioma. In cats, retroperitoneal extra-adrenal paragangliomas are very rare. This is the first computed tomography angiography report of a retroperitoneal extra-adrenal paraganglioma in a domestic cat. Key clinical message: This report describes the computed tomography angiography features of a rare case of a retroperitoneal extra-adrenal paraganglioma in a cat. These features could be taken into consideration to direct the diagnosis of a possible neuroendocrine origin for a retroperitoneal mass in a cat.
    Caractéristiques de l’angiographie par tomodensitométrie d’un para-gangliome extra-surrénalien rétropéritonéal chez un chatUne chatte domestique à poils courts, âgée de 7 ans, stérilisée, a été présentée pour évaluation d’une lésion abdominale de grand volume occupant de l’espace. Un examen d’angiographie tomodensitométrique a détecté une masse rétropéritonéale ronde, en contact avec les gros vaisseaux abdominaux, caractérisée par une capsule externe hyper-atténuante et un centre hypo-atténuant plus large. La capsule présentait une atténuation des tissus mous avec une prise de contraste hétérogène marquée. Le centre était hypoatténuant avant et après l’administration le milieu de contraste. La masse a déplacé latéralement les deux reins et ventralement le côlon descendant. Le diamètre des veines mésentériques et des deux veines phrénico-abdominales était nettement augmenté. Cependant, les surrénales n’étaient pas impliquées. À la phase excrétrice, aucune augmentation de contraste n’a été observée dans les deux uretères, à l’exception du tractus proximal de l’uretère droit. Lors de la laparotomie, les deux uretères pénétraient dans la masse adhérente aux gros vaisseaux abdominaux. Le diagnostic cytologique était un paragangliome extra-surrénalien rétropéritonéal. Chez le chat, les para-gangliomes extra-surrénaliens rétropéritonéaux sont très rares. Il s’agit du premier rapport d’angiographie par tomodensitométrie d’un para-gangliome extra-surrénalien rétropéritonéal chez un chat domestique.Message clinique clé:Ce rapport décrit les caractéristiques de l’angiographie par tomodensitométrie d’un cas rare de paragangliome extra-surrénalien rétropéritonéal chez un chat. Ces caractéristiques pourraient être prises en considération pour orienter le diagnostic d’une éventuelle origine neuroendocrinienne d’une masse rétropéritonéale chez un chat.(Traduit par Dr Serge Messier).
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  • DOI:
    文章类型: Case Reports
    The clinical presentation, cytologic findings, radiographic findings, and postmortem assessment of a cat with primary pulmonary adenocarcinoma with multiple digital metastasis are described. An unusual shifting, waxing and waning pattern of lameness, suspected to be an early manifestation of digital metastasis before any gross lesions were visible, was documented. Initial cytologic finding of a lung nodule was equivocal for diagnosis of neoplasia despite being strongly suspicious. Palliative management was short-lived, with rapid progression culminating in widespread metastasis to multiple digits, muscles, and other organs. The diagnosis of pulmonary adenocarcinoma was confirmed via necropsy and histopathology. Key clinical message: This case report highlights that feline lung-digit syndrome is an important differential diagnosis for an acute, waxing and waning, shifting leg lameness in an older cat. This pattern of lameness should raise the index of suspicion for an underlying primary lung neoplasm, and thoracic imaging (radiographs) should be considered.
    Syndrome pulmonaire-digital félin : un diagnostic différentiel des boiteries changeantes, croissantes et décroissantes chez un chatLa présentation clinique, les résultats cytologiques, les résultats radiographiques et l’évaluation post mortem d’un chat atteint d’adénocarcinome pulmonaire primaire avec métastases numériques multiples sont décrits. Un schéma inhabituel de boiterie, variable, croissante et décroissante, suspecté d’être une manifestation précoce de métastases digitales avant que des lésions macroscopiques ne soient visibles, a été documenté. La découverte cytologique initiale d’un nodule pulmonaire était équivoque pour le diagnostic de néoplasie bien qu’elle soit fortement suspecte. La prise en charge palliative a été de courte durée, avec une progression rapide aboutissant à des métastases généralisées à plusieurs doigts, muscles et autres organes. Le diagnostic d’adénocarcinome pulmonaire a été confirmé par autopsie et histopathologie.Message clinique clé :Ce rapport de cas souligne que le syndrome pulmonaire-digital félin est un diagnostic différentiel important pour une boiterie aiguë, croissante et décroissante et mobile des pattes chez un chat ágé. Ce type de boiterie devrait faire suspecter une tumeur primaire du poumon sous-jacente, et une imagerie thoracique (radiographies) devrait être envisagée.(Traduit par Dr Serge Messier).
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  • 文章类型: Journal Article
    背景:猫乳腺癌(FMC)是一种常见的侵袭性和高转移性癌症,影响雌性猫。早期检测对于预防局部和远处转移至关重要,从而提高整体生存率。虽然在手术前获取分子数据具有显著的潜在益处,目前用于监测非转移性FMC(NmFMC)和转移性FMC(mFMC)疾病进展的蛋白质生物标志物有限.本研究的目的是使用液相色谱-串联质谱法研究NmFMC和mFMC的血清肽组谱。进行了一项横断面研究,以比较13个NmFMC的血清肽组谱,23只mFMC和18只健康猫。对未胰蛋白酶化的样品进行液相色谱-串联质谱分析。
    结果:在观察到的8284种表达蛋白中,发现几种蛋白质与人类乳腺癌有关。在NmFMC,独特的蛋白质表达包括双链RNA结合蛋白Staufen同源物2(STAU2),与细胞增殖有关,以及与锌指结构域2A(BAZ2A)和γ-氨基丁酸A型受体亚基ε(GABRE)相邻的溴结构域,被确定为潜在的治疗目标。矛盾的是,出现了积极的预后标志物,如补体C1q样3(C1QL3)和红细胞膜蛋白带4.1(EPB41或4.1R)。在MFMC组中,与不良预后相关的过表达蛋白,包括B细胞淋巴瘤6转录抑制因子(BCL6),硫氧还蛋白还原酶3(TXNRD3)和铜蓝蛋白(CP)。同时,POU5类同源盒(POU5F1或OCT4)和层粘连蛋白亚基α1(LAMA1)的存在,报告为转移性生物标志物,已注意到。
    结论:观察到存在促增殖蛋白和抗增殖蛋白,可能表明NmFMC的独特特征。相反,mFMC组发现与不良预后和转移相关的蛋白.
    BACKGROUND: Feline mammary carcinoma (FMC) is a common aggressive and highly metastatic cancer affecting female cats. Early detection is essential for preventing local and distant metastasis, thereby improving overall survival rates. While acquiring molecular data before surgery offers significant potential benefits, the current protein biomarkers for monitoring disease progression in non-metastatic FMC (NmFMC) and metastatic FMC (mFMC) are limited. The objective of this study was to investigate the serum peptidome profiles of NmFMC and mFMC using liquid chromatography-tandem mass spectrometry. A cross-sectional study was conducted to compare serum peptidome profiles in 13 NmFMC, 23 mFMC and 18 healthy cats. The liquid chromatography-tandem mass spectrometry analysis was performed on non-trypsinized samples.
    RESULTS: Out of a total of 8284 expressed proteins observed, several proteins were found to be associated with human breast cancer. In NmFMC, distinctive protein expressions encompassed double-stranded RNA-binding protein Staufen homolog 2 (STAU2), associated with cell proliferation, along with bromodomain adjacent to zinc finger domain 2A (BAZ2A) and gamma-aminobutyric acid type A receptor subunit epsilon (GABRE), identified as potential treatment targets. Paradoxically, positive prognostic markers emerged, such as complement C1q like 3 (C1QL3) and erythrocyte membrane protein band 4.1 (EPB41 or 4.1R). Within the mFMC group, overexpressed proteins associated with poor prognosis were exhibited, including B-cell lymphoma 6 transcription repressor (BCL6), thioredoxin reductase 3 (TXNRD3) and ceruloplasmin (CP). Meanwhile, the presence of POU class 5 homeobox (POU5F1 or OCT4) and laminin subunit alpha 1 (LAMA1), reported as metastatic biomarkers, was noted.
    CONCLUSIONS: The presence of both pro- and anti-proliferative proteins was observed, potentially indicating a distinctive characteristic of NmFMC. Conversely, proteins associated with poor prognosis and metastasis were noted in the mFMC group.
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  • 文章类型: Journal Article
    猫泛白细胞减少症是由猫泛白细胞减少症病毒(FPV)引起的一种传染性病毒性疾病。一种密切相关的病原体是犬细小病毒(CPV),和该病毒中的氨基酸取代使其能够获得猫科动物的宿主范围。在猫科动物宿主中,由CPV引起的疾病表现出与FPV或较温和的症状相似的症状,导致其诊断不足。这项研究的目的是确定具有泛白细胞减少症临床症状的猫中CPV2型(CPV-2)的存在,并评估将商业CPV抗原测试用于FPV的临床诊断。
    来自斯洛伐克中部的59只猫的样品被包括在研究中。收集直肠拭子并使用商业抗原测试对细小病毒感染进行临床测试。通过靶向病毒VP2基因的PCR确认抗原阳性样品。用Sanger法建立PCR产物的序列。
    在59个样本中,通过抗原和PCR测试发现23例细小病毒感染呈阳性(38.9%)。国家生物技术信息中心BLASTn应用的分析显示与FPV成对同一性99.78-100%。本研究中纳入的细小病毒感染猫的死亡率为8.69%(2/23)。
    尽管未证实患有CPV-2的猫科动物疾病,CPV抗原检测能够检测FPV感染.
    UNASSIGNED: Feline panleukopenia is a contagious viral disease caused by the feline panleukopenia virus (FPV). A closely related pathogen is canine parvovirus (CPV), and amino acid substitutions in this virus allow it to acquire a feline host range. In feline hosts, the disease induced by CPV manifests with similar symptoms to those caused by FPV or milder ones, leading to its underdiagnosis. The aim of this study was to determine the presence of CPV type 2 (CPV-2) in cats with clinical symptoms of panleukopenia and to assess the use of commercial CPV antigen tests for the clinical diagnosis of FPV.
    UNASSIGNED: Samples from 59 cats from central Slovakia were included in the study. Rectal swabs were collected and clinically tested for parvovirus infection using a commercial antigen test. Antigen-positive samples were confirmed by PCR targeting the viral VP2 gene. The sequences of the PCR products were established with the Sanger method.
    UNASSIGNED: Of 59 samples, 23 were revealed to be positive for parvovirus infection by both antigen and PCR test (38.9%). Analysis with the National Center for Biotechnology Information BLASTn application showed 99.78-100% pairwise identity with FPV. The mortality rate of parvovirus-infected cats included in this study was 8.69% (2/23).
    UNASSIGNED: Although feline disease with CPV-2 was not confirmed, the CPV antigen test was able to detect FPV infection.
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  • 文章类型: Journal Article
    肺毛细血管血管瘤病(PCH)是一种特发性疾病,肺组织中的小毛细血管样血管异常增殖,这可能导致严重的PH。兽医文献中描述的PCH只有几例:狗27例,猫2例。在兽医学中,PH主要被认为是左心衰竭的结果,是毛细血管后PH向毛细血管前形式的进展。PCH主要被描述为原发性疾病,但是,具有很高的肺水肿可能性的毛细血管后PH的耐药性引起了人们的猜测,即PCH可能是左心疾病的继发性畸形。
    在PH发展的背景下,发现与左侧和右侧心脏病之间转移相关的特征。
    回顾性分析具有PCH(sPCH)组织学标记的猫和狗的材料与右心衰竭(RHF)的材料。
    具有PCH的组织学和免疫组织化学标记的动物先前有患有左心容量超负荷的疾病史。两组之间的X线片和大体病理没有差异。组织学上,在RHF中可以发现肺纤维化和动脉病;在sPCH中,肺泡间隔中的毛细血管重复和周围结构中的奇异增殖。
    PCH可能是由于容量超负荷引起的血管重塑的次要模式。
    UNASSIGNED: Pulmonary capillary hemangiomatosis (PCH) is an idiopathic disease with the anomalous proliferation of a small capillary-like vessel in the pulmonary tissue, which can lead to a severe form of PH. There are only several cases of PCH described in veterinary literature: 27 cases in dogs and 2 cases in cats. In veterinary medicine, PH is mostly recognized as a consequence of left heart failure as a progression of the postcapillary PH to the precapillary form. PCH is mostly described as a primary disease, but resistant postcapillary PH with the high possibility of pulmonary edema raises speculation that PCH could be a secondary malformation to the left heart disease.
    UNASSIGNED: Discover the features associated with the shift between left- and right-sided heart disease in the context of PH development.
    UNASSIGNED: Retrospective analysis of materials from cats and dogs with histological markers of PCH (sPCH) versus those with right heart failure (RHF).
    UNASSIGNED: Animals with histological and immunohistochemistry markers of PCH had a previous history of disease with left heart volume overload. There were no differences between the groups in radiography and gross pathology. Histologically, pulmonary fibrosis and arteriopathy could be found in RHF; in sPCH-a duplication of capillaries in alveolar septa and bizarre proliferation in surrounding structures.
    UNASSIGNED: PCH could be a secondary pattern of vascular remodeling due to volume overload.
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  • 文章类型: Journal Article
    假性血小板减少症是在通过自动化机器分析猫血小板(PLT)计数时通常获得的假阴性结果。它与乙二胺四乙酸(EDTA)有关,一种广泛用于采血管的抗凝剂,导致EDTA依赖性假性血小板减少症(EDTA-PTCP)。
    为了研究用卡那霉素处理是否增加了使用EDTA-PTCP收集的猫科动物血液样本中PLT聚集的量。
    使用EDTA管获得31个血液样品。使用自动化的MindrayBC-5000Vet分析全血细胞计数。进行手动细胞计数和稀薄血液涂片以估计红细胞的数量,白细胞,和PLT以及评估PLT聚集的严重程度评分,分别。在EDTA管中进行预处理的那些和用卡那霉素处理的那些之间进行比较。
    在用卡那霉素处理之前和之后,样品的平均PLT计数显着不同,两者都是自动的(156.6±76.4vs.260.3±115.5;p<0.001)和手动(168.5±92.1与262.8±119.6;p<0.001)读数,95%置信区间为0.19(0.022-0.365)。
    这项研究表明,在临床实验室实践中,应将卡那霉素与EDTA-PTCP一起添加到猫科动物的血液样本中。
    UNASSIGNED: Pseudothrombocytopenia is a commonly obtained false negative result when analyzing feline platelet (PLT) count by an automated machine. It is related to ethylenediamine tetra-acetic acid (EDTA), a widely utilized anticoagulant in blood collection tubes, resulting in EDTA-dependent pseudothrombocytopenia (EDTA-PTCP).
    UNASSIGNED: To investigate whether treated with kanamycin enhanced the quantity of PLT aggregations in feline blood specimens collected using EDTA-PTCP.
    UNASSIGNED: Thirty-one blood samples were obtained using EDTA tubes. The complete blood count was analyzed using an automated Mindray BC-5000Vet. Both Manual cell counts and thin blood smears were performed to estimate the amount of red blood cell, white blood cell, and PLTs as well as to evaluate the severity scores of PLT clumping, respectively. Comparisons were made between those pre-treated and those treated with kanamycin in the EDTA tube.
    UNASSIGNED: There were significantly different mean PLT counts in the samples before and after they were treated with kanamycin, both on automated (156.6 ± 76.4 vs. 260.3 ± 115.5; p < 0.001) and manual (168.5 ± 92.1 vs. 262.8 ± 119.6; p < 0.001) readings, with a 95% confidence interval of 0.19 (0.022-0.365).
    UNASSIGNED: This study suggests that in clinical laboratory practice, kanamycin should be added to feline blood specimens with EDTA-PTCP.
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  • 文章类型: Journal Article
    背景:数字成像与基于深度学习的计算图像分析相结合是医学诊断中不断增长的领域,包括寄生虫学,其中已经开发了许多自动分析设备,并可用于临床实践。
    方法:ParasightAll-in-one(AIO)的性能,第二代设备,通过将其与公认的研究方法(mini-FLOTAC)和另一种市售测试(Imagyst)进行比较来进行评估。通过所有三种方法对59个犬和猫感染的粪便标本进行了定量分析。由于一些样本对一种以上的寄生虫呈阳性,该数据集包括48个Ancylostomaspp阳性标本。,13为弓形虫属。和23为毛虫属。
    结果:ParasightAIO计数的大小与mini-FLOTAC的大小相关,但与Imagyst的大小无关。ParasightAIO计数的Ancylostomaspp卵增加了约3.5倍。和Trichurisspp.弓形虫属的卵子增加了4.6倍。而不是迷你FLOTAC,并计算了27.9-,这些相同的卵子比Imagyst多17.1倍和10.2倍,分别。这些差异转化为在低卵计数水平(<50卵/g)下测试灵敏度之间的差异,与ParasightAIO>mini-FLOTAC>Imagyst。在更高的卵数下,ParasightAIO和mini-FLOTAC以可比的精度进行(明显高于Imagyst),而在较低计数(>30个鸡蛋/g)时,Parasight比mini-FLOTAC和Imagyst更精确,而后两种方法没有显着差异。
    结论:一般来说,ParasightAIO分析比mini-FLOTAC和Imagyst更精确,更灵敏,并且与mini-FLOTAC定量相关。虽然ParasightAIO生产的每克鸡蛋的原始计数低于mini-FLOTAC,这些可以使用从这些相关性产生的数据进行校正。
    BACKGROUND:  Digital imaging combined with deep-learning-based computational image analysis is a growing area in medical diagnostics, including parasitology, where a number of automated analytical devices have been developed and are available for use in clinical practice.
    METHODS: The performance of Parasight All-in-One (AIO), a second-generation device, was evaluated by comparing it to a well-accepted research method (mini-FLOTAC) and to another commercially available test (Imagyst). Fifty-nine canine and feline infected fecal specimens were quantitatively analyzed by all three methods. Since some samples were positive for more than one parasite, the dataset consisted of 48 specimens positive for Ancylostoma spp., 13 for Toxocara spp. and 23 for Trichuris spp.
    RESULTS: The magnitude of Parasight AIO counts correlated well with those of mini-FLOTAC but not with those of Imagyst. Parasight AIO counted approximately 3.5-fold more ova of Ancylostoma spp. and Trichuris spp. and 4.6-fold more ova of Toxocara spp. than the mini-FLOTAC, and counted 27.9-, 17.1- and 10.2-fold more of these same ova than Imagyst, respectively. These differences translated into differences between the test sensitivities at low egg count levels (< 50 eggs/g), with Parasight AIO > mini-FLOTAC > Imagyst. At higher egg counts Parasight AIO and mini-FLOTAC performed with comparable precision (which was significantly higher that than Imagyst), whereas at lower counts (> 30 eggs/g) Parasight was more precise than both mini-FLOTAC and Imagyst, while the latter two methods did not significantly differ from each other.
    CONCLUSIONS: In general, Parasight AIO analyses were both more precise and sensitive than mini-FLOTAC and Imagyst and quantitatively correlated well with mini-FLOTAC. While Parasight AIO produced lower raw counts in eggs-per-gram than mini-FLOTAC, these could be corrected using the data generated from these correlations.
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  • 文章类型: Journal Article
    立克次体在世界范围内发生,立克次体病在世界几个地区被认为是一种新兴的感染。蜱是人类和家畜中致病性立克次体物种的水库宿主。大多数致病性立克次体属斑点热组(SFG)。本研究旨在识别和诊断蜱动物,并调查立克次体的患病率。在克尔曼省农村地区的家畜和狗身上采集的蜱虫中,伊朗东南部。在这项研究中,鉴定了tick虫物种(动物),并使用实时PCR检测了来自两个属和物种的2100个tick虫(350个合并样品),其中包括Rhipicephaluslinnaei(1128)和Hyalommadeteriitum(972)。在24.9%(95CI20.28-29.52)的合并样品中观察到立克次体属的存在。测序和系统发育分析显示存在立克次体aeschlimannii(48.98%),以色列立克次体(28.57%),Sibirica立克次体(20.41%),阳性样本中的立克次体(2.04%)。结果表明,县变量与以下变量之间存在显着关联:tickspp。(p<0.001),蜱(p<0.001)和立克次体属感染。(p<0.001)。此外,蜱物种和宿主动物(狗和家畜)之间存在显著关联(p<0.001),蜱的立克次体感染(p<0.001),和立克次体。(p<0.001)。这项研究表明立克次体的患病率很高。(SFG)在克尔曼省农村地区的家畜和狗中。应告知卫生系统立克次体病的可能性以及这些地区立克次体的流行物种。
    Rickettsia occurs worldwide and rickettsiosis is recognized as an emerging infection in several parts of the world. Ticks are reservoir hosts for pathogenic Rickettsia species in humans and domestic animals. Most pathogenic Rickettsia species belong to the spotted Fever Group (SFG). This study aimed to identify and diagnose tick fauna and investigate the prevalence of Rickettsia spp. in ticks collected from domestic animals and dogs in the rural regions of Kerman Province, Southeast Iran. In this study, tick species (fauna) were identified and 2100 ticks (350 pooled samples) from two genera and species including Rhipicephalus linnaei (1128) and Hyalomma deteritum (972) were tested to detect Rickettsia genus using Real-time PCR. The presence of the Rickettsia genus was observed in 24.9% (95%CI 20.28-29.52) of the pooled samples. Sequencing and phylogenetic analyses revealed the presence of Rickettsia aeschlimannii (48.98%), Rickettsia conorii israelensis (28.57%), Rickettsia sibirica (20.41%), and Rickettsia helvetica (2.04%) in the positive samples. The results showed a significant association between county variables and the following variables: tick spp. (p < 0.001), Rickettsia genus infection in ticks (p < 0.001) and Rickettsia spp. (p < 0.001). In addition, there was a significant association between tick species and host animals (dogs and domestic animals) (p < 0.001), Rickettsia spp infection in ticks (p < 0.001), and Rickettsia spp. (p < 0.001). This study indicates a high prevalence of Rickettsia spp. (SFG) in ticks of domestic animals and dogs in rural areas of Kerman Province. The health system should be informed of the possibility of rickettsiosis and the circulating species of Rickettsia in these areas.
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  • 文章类型: Journal Article
    逆转录病毒的包膜糖蛋白(Env),例如猫白血病病毒(FeLV),是中和体液反应的主要目标,因此,一个有前途的候选疫苗,尽管据报道其免疫原性差。在融合前构象中掺入稳定来自其他病毒的类似蛋白的突变(例如,艾滋病毒感染,SARS-CoV-2S,或RSVF糖蛋白)提高了它们诱导中和保护性免疫应答的能力。因此,我们已经稳定了FeLVEnv蛋白,该策略基于先前用于生成可溶性HIVEnv三聚体的二硫键和Ile/Pro突变(SOSIP)的掺入。我们已经将这种SOSIP-FeLVEnv表征为其可溶形式,并作为高密度存在于基于FeLVGag的VLP表面上的跨膜蛋白。此外,我们已经在C57BL/6小鼠的DNA免疫试验中测试了其免疫原性。在SOSIP-FeLV可溶性蛋白免疫的动物中检测到低的抗FeLVEnv应答;然而,在用基于SOSIP-FeLVGag的VLP免疫的动物中意外地没有检测到应答。相比之下,在用缺乏SOSIP-FeLVEnv的对照GagVLP免疫的动物中观察到针对FeLVGag的高体液应答,而当VLP掺入SOSIP-FeLVEnv时,这种反应明显受损。我们的数据表明,FeLVEnv可以稳定为可溶性蛋白,并且可以在高密度VLP中表达。然而,当配制成DNA疫苗时,SOSIP-FeLVEnv仍然缺乏免疫原性,开发有效的FeLV疫苗必须克服的限制。
    The envelope glycoprotein (Env) of retroviruses, such as the Feline leukemia virus (FeLV), is the main target of neutralizing humoral response, and therefore, a promising vaccine candidate, despite its reported poor immunogenicity. The incorporation of mutations that stabilize analogous proteins from other viruses in their prefusion conformation (e.g., HIV Env, SARS-CoV-2 S, or RSV F glycoproteins) has improved their capability to induce neutralizing protective immune responses. Therefore, we have stabilized the FeLV Env protein following a strategy based on the incorporation of a disulfide bond and an Ile/Pro mutation (SOSIP) previously used to generate soluble HIV Env trimers. We have characterized this SOSIP-FeLV Env in its soluble form and as a transmembrane protein present at high density on the surface of FeLV Gag-based VLPs. Furthermore, we have tested its immunogenicity in DNA-immunization assays in C57BL/6 mice. Low anti-FeLV Env responses were detected in SOSIP-FeLV soluble protein-immunized animals; however, unexpectedly no responses were detected in the animals immunized with SOSIP-FeLV Gag-based VLPs. In contrast, high humoral response against FeLV Gag was observed in the animals immunized with control Gag VLPs lacking SOSIP-FeLV Env, while this response was significantly impaired when the VLPs incorporated SOSIP-FeLV Env. Our data suggest that FeLV Env can be stabilized as a soluble protein and can be expressed in high-density VLPs. However, when formulated as a DNA vaccine, SOSIP-FeLV Env remains poorly immunogenic, a limitation that must be overcome to develop an effective FeLV vaccine.
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