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https://www.readbyqxmd.com/read/28705746/first-report-of-ehrlichia-infection-in-goats-china
#1
Hui Zhang, Zhenyu Chang, Khalid Mehmood, Yajing Wang, Mujeeb Ur Rehman, Fazul Nabi, Ahamad Jawad Sabir, Xueting Liu, Xiaoxing Wu, Xinxin Tian, Donghai Zhou
Ehrlichiosis is an emerging infectious disease of domestic animals which is transmitted by ticks. This disease has been reported earlier in most parts of China in dogs, cattle and humans, but there is no published data regarding this disease in goats. The present study provided the evidence of Ehrlichia infection in goats in Wuhan, China on the basis of clinical signs, gross lesions, serum-biochemical, histopathological and PCR. Twenty four goats were presented to the veterinary hospital of Huazhong Agricultural University during July, 2016...
July 11, 2017: Microbial Pathogenesis
https://www.readbyqxmd.com/read/28700062/seropositivity-for-rickettsia-spp-and-ehrlichia-spp-in-the-human-population-of-mato-grosso-central-western-brazil
#2
Maria Cristina Fuzari Bezerra, Andréia Lima Tomé Melo, Isis Indaiara Gonçalves Granjeiro Taques, Daniel Moura de Aguiar, Richard Campos Pacheco, Renata Dezengrini Slhessarenko
INTRODUCTION: The epidemiology of Rickettsia and Ehrlichia species infection is underestimated in Mato Grosso State. METHODS: Serum samples obtained during a Dengue outbreak in 2011-2012 were tested via indirect immunofluorescence and/or ELISA. RESULTS: Samples from 19/506 (3.8%) patients presented antibodies for at least one of three Rickettsia species; 2/506 (0.4%) samples reacted against Ehrlichia canis. Most afflicted patients are residents of cities from the south-central region of the state, where these diseases have been reported in animals...
May 2017: Revista da Sociedade Brasileira de Medicina Tropical
https://www.readbyqxmd.com/read/28699575/proposal-to-reclassify-ehrlichia-muris-as-ehrlichia-muris-subsp-muris-subsp-nov-and-description-of-ehrlichia-muris-subsp-eauclairensis-subsp-nov-a-newly-recognized-tick-borne-pathogen-of-humans
#3
Bobbi S Pritt, Michelle E J Allerdice, Lynne M Sloan, Christopher D Paddock, Ulrike G Munderloh, Yasuko Rikihisa, Tomoko Tajima, Susan M Paskewitz, David F Neitzel, Diep K Hoang Johnson, Elizabeth Schiffman, Jeffrey P Davis, Cynthia S Goldsmith, Curtis M Nelson, Sandor E Karpathy
We have previously described a novel taxon of the genus Ehrlichia (type strain WisconsinT), closely related to Ehrlichia muris, that causes human ehrlichiosis among patients with exposures to ticks in the upper midwestern USA. DNA from this bacterium was also detected in Ixodes scapularis and Peromyscus leucopus collected in Minnesota and Wisconsin. To determine the relationship between the E. muris-like agent (EMLA) and other species of the genus Ehrlichia phenotypic, genotypic and epidemiologic comparisons were undertaken, including sequence analysis of eight gene loci (3906 nucleotides) for 39 EMLA DNA samples and the type strain of E...
July 12, 2017: International Journal of Systematic and Evolutionary Microbiology
https://www.readbyqxmd.com/read/28690147/novel-anaplasma-and-ehrlichia-organisms-infecting-the-wildlife-of-two-regions-of-the-brazilian-amazon
#4
Herbert S Soares, Arlei Marcili, Amália R M Barbieri, Antonio H H Minervino, Antonio F Malheiros, Solange M Gennari, Marcelo B Labruna
During 2009-2012, wild animals were sampled in the Amazon biome of Brazil. Animal tissues and blood were tested by polymerase chain reaction (PCR) assays targeting DNA of the bacterial family Anaplasmataceae (genera Anaplasma, Ehrlichia, Wolbachia) and the genus Borrelia. Overall, 181 wild animals comprising 36 different species (2 reptiles, 5 birds, and 29 mammals) were sampled. All birds and reptiles were negative by all PCR assays, as well as all mammals for the Borrelia PCR assay. Anaplasmataceae agents were searched by PCR assays targeting two different genes, the ribosomal 16S rRNA gene and the protein-coding dsb gene...
July 6, 2017: Acta Tropica
https://www.readbyqxmd.com/read/28682765/a-pcr-survey-of-vector-borne-pathogens-in-different-dog-populations-from-turkey
#5
Huanping Guo, Ferda Sevinc, Onur Ceylan, Mutlu Sevinc, Ege Ince, Yang Gao, Paul Franck Adjou Moumouni, Mingming Liu, Artemis Efstratiou, Guanbo Wang, Shinuo Cao, Mo Zhou, Charoonluk Jirapattharasate, Aaron Edmond Ringo, Weiqing Zheng, Xuenan Xuan
In the present study, a total of 192 blood samples were collected from pet dogs, kennel dogs and shepherd dogs in Konya district, Turkey, and tested by specific PCR for the presence of vector-borne pathogens. Several pathogens were identified, most of which can cause substantial morbidity in dogs. PCR results revealed that 54 (28.1%) dogs were infected with one or more pathogens. Positive results were obtained for Babesia spp. in 4 dogs (2.1%), Hepatozoon spp. in 8 dogs (4.2%) and Mycoplasma spp. in 46 dogs (24%)...
September 26, 2017: Acta Parasitologica
https://www.readbyqxmd.com/read/28673455/neorickettsia-risticii-rickettsia-sp-and-bartonella-sp-in-tadarida-brasiliensis-bats-from-buenos-aires-argentina
#6
Gabriel L Cicuttin, María N De Salvo, Isabel La Rosa, Federico E Gury Dohmen
Bats are potential reservoirs of many vector-borne bacterial pathogens. The aim of the present study was to detect species of Anaplasma, Ehrlichia, Neorickettsia, Rickettsia, Borrelia and Bartonella in Brazilian free-tailed bats (Tadarida brasiliensis, Molossidae) from Buenos Aires city, Argentina. Between 2012 and 2013, 61 T. brasiliensis from urban areas of Buenos Aires city were studied. The samples were molecularly screened by PCR and sequencing. Five bats (8.2%) were positive to Neorickettsia risticii, one (1...
June 2017: Comparative Immunology, Microbiology and Infectious Diseases
https://www.readbyqxmd.com/read/28669382/new-wide-dynamic-range-assays-for-quantification-of-anti-leishmania-igg2-and-iga-antibodies-in-canine-serum
#7
Ana Cantos-Barreda, Damián Escribano, Luis J Bernal, Luis Pardo-Marín, José J Cerón, Silvia Martínez-Subiela
The aims of this study were (1) to develop and validate time resolved-immunofluorometric assays for the detection of anti-Leishmania IgG2 and IgA antibodies in canine serum and (2) to evaluate the ability of these assays to quantify different amounts of anti-Leishmania antibodies in Leishmania-seronegative and seropositive dogs, determined by a commercial ELISA assay, and between different clinical stages according to LeishVet guidelines. The analytical validation showed that the assays had a good precision with intra- and inter-assay coefficients of variation lower than 10%...
July 2017: Veterinary Immunology and Immunopathology
https://www.readbyqxmd.com/read/28658415/ehrlichia-canis-and-rickettsia-spp-in-dogs-from-urban-areas-in-paraiba-state-northeastern-brazil
#8
Tereza Emmanuelle de Farias Rotondano, Felipe da Silva Krawczak, Werona de Oliveira Barbosa, Jonas Moraes-Filho, Fernanda Nieri Bastos, Marcelo Bahia Labruna, Sérgio Santos de Azevedo, Marcia Almeida de Melo, Alzira Maria Paiva de Almeida
The aims of our study was to identify Ehrlichia canis and antibodies against Rickettsia spp. belonging to the spotted fever group (SFG) in dogs sampled from Paraiba state, northeastern Brazil. Blood and serum samples collected by convenience from dogs in urban areas of five municipalities were analyzed by real-time PCR for the detection of E. canis DNA and by immunofluorescence assay test (IFAT) for the identification of antibodies against Rickettsia rickettsii, R. felis, R. parkeri, R. amblyommii and R. rhipicephali antigens...
June 22, 2017: Revista Brasileira de Parasitologia Veterinária, Brazilian Journal of Veterinary Parasitology
https://www.readbyqxmd.com/read/28657860/prevalence-of-babesia-spp-ehrlichia-spp-and-tick-infestations-in-oklahoma-black-bears-ursus-americanus
#9
Delaina Skinner, Jessica R Mitcham, Lindsay A Starkey, Bruce H Noden, W Sue Fairbanks, Susan E Little
American black bears (Ursus americanus) are commonly infested with ticks throughout their range, but there are few surveys for tick-borne disease agents in bears. To characterize tick infestations and determine the prevalence of current infection with Babesia spp. and past or current infection with Ehrlichia spp. in newly re-established populations of black bears in east central and southeastern Oklahoma, we identified adult (n=1,048) and immature (n=107) ticks recovered from bears (n=62). We evaluated serum and whole blood samples from a subset (n=49) for antibodies reactive to, and characteristic DNA fragments of Ehrlichia spp...
June 28, 2017: Journal of Wildlife Diseases
https://www.readbyqxmd.com/read/28650718/subversion-of-rab5-regulated-autophagy-by-the-intracellular-pathogen-ehrlichia-chaffeensis
#10
Yasuko Rikihisa
Intracellular pathogens often exploit RAB functions to establish a safe haven in which to survive and proliferate. Ehrlichia chaffeensis, an obligatory intracellular bacterium, resides in specialized membrane-bound inclusions that have early endosome-like characteristics, e.g., resident RAB5 GTPase and RAB5 effectors, including VPS34 (the catalytic subunit of class III phosphatidylinositol 3-kinase), but the inclusions lack late endosomal or lysosomal markers. Within inclusions, Ehrlichia obtains host-derived nutrients by inducing RAB5-regulated autophagy using Ehrlichia translocated factor-1 deployed by its type IV secretion system...
June 26, 2017: Small GTPases
https://www.readbyqxmd.com/read/28645313/molecular-investigation-and-phylogeny-of-anaplasmataceae-species-infecting-domestic-animals-and-ticks-in-corsica-france
#11
Mustapha Dahmani, Bernard Davoust, Djamel Tahir, Didier Raoult, Florence Fenollar, Oleg Mediannikov
BACKGROUNDS: Corsica is a French island situated in the Mediterranean Sea. The island provides suitable natural conditions to study disease ecology, especially tick-borne diseases and emerging diseases in animals and ticks. The family Anaplasmataceae is a member of the order Rickettsiales; it includes the genera Anaplasma, Ehrlichia, Neorickettsia and Wolbachia. Anaplasmosis and ehrlichiosis traditionally refer to diseases caused by obligate intracellular bacteria of the genera Anaplasma and Ehrlichia...
June 23, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/28638803/peptide-nucleic-acid-knockdown-and-intra-host-cell-complementation-of-ehrlichia-type-iv-secretion-system-effector
#12
Pratibha Sharma, Omid Teymournejad, Yasuko Rikihisa
Survival of Ehrlichia chaffeensis depends on obligatory intracellular infection. One of the barriers to E. chaffeensis research progress has been the inability, using conventional techniques, to generate knock-out mutants for genes essential for intracellular infection. This study examined the use of Peptide Nucleic Acids (PNAs) technology to interrupt type IV secretion system (T4SS) effector protein expression in E. chaffeensis followed by intracellular complementation of the effector to determine its requirement for infection...
2017: Frontiers in Cellular and Infection Microbiology
https://www.readbyqxmd.com/read/28633666/molecular-detection-of-vector-borne-pathogens-in-dogs-and-cats-from-qatar
#13
Ana Margarida Alho, Clara Lima, Maria Stefania Latrofa, Vito Colella, Silvia Ravagnan, Gioia Capelli, Luís Madeira de Carvalho, Luís Cardoso, Domenico Otranto
BACKGROUND: Vector-borne diseases (VBDs) have been increasingly reported in dogs and cats worldwide. However, no data are currently available regarding canine and feline VBDs in Qatar and limited information is available from other Persian Gulf countries. METHODS: Blood samples from 98 client-owned animals (i.e. 64 dogs and 34 cats) living in Doha (Qatar) were collected and the presence of genomic DNA of Anaplasma spp., Babesia spp., Dirofilaria spp., Ehrlichia spp...
June 20, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/28632488/vector-borne-pathogens-in-stray-dogs-in-northeastern-turkey
#14
Esin Guven, Hamza Avcioglu, Seyda Cengiz, Armagan Hayirli
This experiment was carried out to attain prevalence and molecular characterization of pathogens causing canine vector-borne diseases (CVBDs) including babesiosis, hepatozoonosis, leishmaniasis, filariosis (Dirofilaria immitis, Dirofilaria repens, and Acanthocheilonema reconditum), ehrlichiosis (Ehrlichia canis), and anaplasmosis (Anaplasma platys) in stray dogs. The study material consisted of 133 asymptomatic female (n = 96) and male (n = 37) stray dogs (≤1 year old, n = 16 and 1-6 years old, n = 117) housed in the Animal Care and Rehabilitation Center, Erzurum, Northeastern Turkey...
June 20, 2017: Vector Borne and Zoonotic Diseases
https://www.readbyqxmd.com/read/28630068/ehrlichia-chaffeensis-trp120-moonlights-as-a-hect-e3-ligase-involved-in-self-and-host-ubiquitination-to-influence-protein-interactions-and-stability-for-intracellular-survival
#15
Bing Zhu, Seema Das, Shubhajit Mitra, Tierra R Farris, Jere W McBride
Ehrlichia chaffeensis secretes tandem repeat protein (TRP) effectors that are involved in a diverse array of host cell interactions, some of which directly activate cell signaling pathways, and reprogram host gene transcription to promote survival in the mononuclear phagocyte. However, the molecular details of these effector-host interactions and roles in pathobiology are incompletely understood. In this study, we determined that the E. chaffeensis effector, TRP120, is post-translationally modified by ubiquitin (Ub), and ubiquitination occurs through intrinsic and host-mediated HECT ligase activity...
June 19, 2017: Infection and Immunity
https://www.readbyqxmd.com/read/28626230/engineering-of-obligate-intracellular-bacteria-progress-challenges-and-paradigms
#16
REVIEW
Erin E McClure, Adela S Oliva Chávez, Dana K Shaw, Jason A Carlyon, Roman R Ganta, Susan M Noh, David O Wood, Patrik M Bavoil, Kelly A Brayton, Juan J Martinez, Jere W McBride, Raphael H Valdivia, Ulrike G Munderloh, Joao H F Pedra
It is estimated that approximately one billion people are at risk of infection with obligate intracellular bacteria, but little is known about the underlying mechanisms that govern their life cycles. The difficulty in studying Chlamydia spp., Coxiella spp., Rickettsia spp., Anaplasma spp., Ehrlichia spp. and Orientia spp. is, in part, due to their genetic intractability. Recently, genetic tools have been developed; however, optimizing the genomic manipulation of obligate intracellular bacteria remains challenging...
June 19, 2017: Nature Reviews. Microbiology
https://www.readbyqxmd.com/read/28620610/molecular-detection-of-tick-borne-pathogen-diversities-in-ticks-from-livestock-and-reptiles-along-the-shores-and-adjacent-islands-of-lake-victoria-and-lake-baringo-kenya
#17
David Omondi, Daniel K Masiga, Burtram C Fielding, Edward Kariuki, Yvonne Ukamaka Ajamma, Micky M Mwamuye, Daniel O Ouso, Jandouwe Villinger
Although diverse tick-borne pathogens (TBPs) are endemic to East Africa, with recognized impact on human and livestock health, their diversity and specific interactions with tick and vertebrate host species remain poorly understood in the region. In particular, the role of reptiles in TBP epidemiology remains unknown, despite having been implicated with TBPs of livestock among exported tortoises and lizards. Understanding TBP ecologies, and the potential role of common reptiles, is critical for the development of targeted transmission control strategies for these neglected tropical disease agents...
2017: Frontiers in Veterinary Science
https://www.readbyqxmd.com/read/28615848/therapeutic-management-of-canine-ehrlichiosis-with-aid-of-blood-transfusion-a-case-report
#18
Arjun Kasondra, Snehil Gupta, Gamit Amit Bhai Bharat Bhai, Vijesh Kumar Saini
An adult female Labrador Retriever dog was presented at referral veterinary polyclinic, IVRI in lateral recumbency with history of anorexia, high fever, severe panting, heavy tick infestation, and not responding to cephalosporins and fluoroquinolones since last 1 week. Clinical examination showed pale conjunctiva, enlarged popliteal lymph node however, electrocardiogram (ECG) report found to be normal. Haematological finding showed marked anaemia and thrombocytopenia. Parasitological examination found it to be positive for Ehrlichia canis and confirmed ticks to be Rhipicephalus sanguineus...
June 2017: Journal of Parasitic Diseases: Official Organ of the Indian Society for Parasitology
https://www.readbyqxmd.com/read/28601472/detection-and-phylogenetic-characterisation-of-novel-anaplasma-and-ehrlichia-species-in-amblyomma-triguttatum-subsp-from-four-allopatric-populations-in-australia
#19
Alexander W Gofton, Helen P Waudby, Sophie Petit, Telleasha L Greay, Una M Ryan, Peter J Irwin
Anaplasma and Ehrlichia spp. are tick-borne pathogens that can cause severe disease in domestic animals, and several species are responsible for emerging zoonoses in the northern hemisphere. Until recently, the only members of these genera reported in Australia (A. marginale, A. centrale, and A. platys) were introduced from other continents, through the importation of domestic animals and their associated ticks. However, unique Anaplasma and Ehrlichia 16S rRNA gene sequences were recently detected for the first time in native Australian ticks, particularly in Amblyomma triguttatum subsp...
August 2017: Ticks and Tick-borne Diseases
https://www.readbyqxmd.com/read/28598270/investigating-the-adult-ixodid-tick-populations-and-their-associated-anaplasma-ehrlichia-and-rickettsia-bacteria-at-a-rocky-mountain-spotted-fever-hotspot-in-western-tennessee
#20
Rebecca T Trout Fryxell, Brain M Hendricks, Kimberly Pompo, Sarah E Mays, Dave J Paulsen, Darwin J Operario, Allan E Houston
Ehrlichiosis and rickettsiosis are two common bacterial tick-borne diseases in the southeastern United States. Ehrlichiosis is caused by ehrlichiae transmitted by Amblyomma americanum and rickettsiosis is caused by rickettsiae transmitted by Amblyomma maculatum and Dermacentor variabilis. These ticks are common and have overlapping distributions in the region. The objective of this study was to identify Anaplasma, Ehrlichia, and Rickettsia species associated with questing ticks in a Rocky Mountain spotted fever (RMSF) hotspot, and identify habitats, time periods, and collection methods for collecting questing-infected ticks...
June 9, 2017: Vector Borne and Zoonotic Diseases
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