scholarly journals Molecular Detection of Ehrlichia canis in the Pet-Dog Population in R. N. Macedonia

2021 ◽  
Vol 71 (2) ◽  
pp. 230-238
Author(s):  
Elena Atanaskova Petrov ◽  
Irena Celeska ◽  
Zagorka Popova ◽  
Kiril Krstevski ◽  
Igor Djadjovski
Keyword(s):  
Molecular Detection ◽  
Clinical Symptoms ◽  
Rhipicephalus Sanguineus ◽  
Ehrlichia Canis ◽  
Diagnostic Methods ◽  
Molecular Diagnostic ◽  
Positive Serology ◽  
Western Asia ◽  
Canine Monocytic Ehrlichiosis ◽  
The City

Abstract Canine monocytic ehrlichiosis (CME) is a widespread, tick-borne, canine disease, caused by an obligate intracellular bacterium, Ehrlichia canis. The main vector, a brown-dog tick, Rhipicephalus sanguineus, is widely distributed, especially in areas with tropic, subtropic, or Mediterranean climates (Central and South America, Eastern and Western Asia, Africa, Australia and Southern Europe). The study performed in 2012, by Stefanovska et al., determined a seroprevalence of 18.7% of E. canis among the Macedonian dog population. Up to date, the presence of E. canis, using molecular diagnostic methods, has not been investigated in Macedonia. Therefore, this study aimed to confirm the presence of E. canis, in the pet-dog population on the territory of the city of Skopje, North Macedonia, using a highly sensitive multiplex Real-Time PCR method (qPCR). Whole blood samples from 80 dogs of different breeds and ages, with clinical symptoms of CME and positive serology result for the presence of antibodies against E.canis, were collected for analyses. Out of 80 dogs, 36 (45%) were found as positive. The present work reports the first molecular detection of E. canis in pet dogs on the territory of the city of Skopje, Macedonia.

Prevalence of Ehrlichia canis (Rickettsiales: Ehrlichieae) DNA in Tissues From Rhipicephalus sanguineus (Acari: Ixodidae) Ticks in Areas Endemic for Canine Monocytic Ehrlichiosis in Brazil

2018 ◽  
Vol 56 (3) ◽  
pp. 828-831
Author(s):  
Bruno César Miranda Oliveira ◽  
Elis Domingos Ferrari ◽  
Milena Araúz Viol ◽  
Marcos Rogério André ◽  
Rosangela Zacarias Machado ◽  
...  
Keyword(s):  
Rhipicephalus Sanguineus ◽  
Ehrlichia Canis ◽  
Canine Monocytic Ehrlichiosis

A point-of-care diagnostic for differentiating Ebola from endemic febrile diseases

2018 ◽  
Vol 10 (471) ◽  
pp. eaat0944 ◽  
Author(s):  
David Sebba ◽  
Alexander G. Lastovich ◽  
Melody Kuroda ◽  
Eric Fallows ◽  
Joshua Johnson ◽  
...  
Keyword(s):  
Ebola Virus ◽  
Clinical Symptoms ◽  
Point Of Care ◽  
Hemorrhagic Fever ◽  
Diagnostic Methods ◽  
Outbreak Detection ◽  
Molecular Diagnostic ◽  
Clinical Samples ◽  
Live Virus ◽  
And Control

Hemorrhagic fever outbreaks such as Ebola are difficult to detect and control because of the lack of low-cost, easily deployable diagnostics and because initial clinical symptoms mimic other endemic diseases such as malaria. Current molecular diagnostic methods such as polymerase chain reaction require trained personnel and laboratory infrastructure, hindering diagnostics at the point of need. Although rapid tests such as lateral flow can be broadly deployed, they are typically not well-suited for differentiating among multiple diseases presenting with similar symptoms. Early detection and control of Ebola outbreaks require simple, easy-to-use assays that can detect and differentiate infection with Ebola virus from other more common febrile diseases. Here, we developed and tested an immunoassay technology that uses surface-enhanced Raman scattering (SERS) tags to simultaneously detect antigens from Ebola, Lassa, and malaria within a single blood sample. Results are provided in <30 min for individual or batched samples. Using 190 clinical samples collected from the 2014 West African Ebola outbreak, along with 163 malaria positives and 233 negative controls, we demonstrated Ebola detection with 90.0% sensitivity and 97.9% specificity and malaria detection with 100.0% sensitivity and 99.6% specificity. These results, along with corresponding live virus and nonhuman primate testing of an Ebola, Lassa, and malaria 3-plex assay, indicate the potential of the SERS technology as an important tool for outbreak detection and clinical triage in low-resource settings.

scholarly journals Efficacy of a Doxycycline Treatment Regimen Initiated during Three Different Phases of Experimental Ehrlichiosis

2010 ◽  
Vol 54 (12) ◽  
pp. 5012-5020 ◽  
Author(s):  
Jennifer C. McClure ◽  
Michelle L. Crothers ◽  
John J. Schaefer ◽  
Patrick D. Stanley ◽  
Glen R. Needham ◽  
...  
Keyword(s):  
Antibiotic Therapy ◽  
Treatment Regimen ◽  
Rhipicephalus Sanguineus ◽  
Ehrlichia Canis ◽  
Clinical Parameters ◽  
Blood Samples ◽  
Persistently Infected ◽  
Doxycycline Treatment ◽  
Canine Monocytic Ehrlichiosis ◽  
Three Phases

ABSTRACT Doxycycline is the treatment of choice for canine monocytic ehrlichiosis (CME), a well-characterized disease and valuable model for tick-borne zoonoses. Conflicting reports of clearance of Ehrlichia canis after treatment with doxycycline suggested that the disease phase during which treatment is initiated influences outcomes of these treatments. The purpose of this study was to evaluate the efficacy of a 28-day doxycycline regimen for clearance of experimental E. canis infections from dogs treated during three phases of the disease. Ten dogs were inoculated with blood from E. canis carriers and treated with doxycycline during acute, subclinical, or chronic phases of CME. Daily rectal temperatures and semiweekly blood samples were monitored from each dog, and Rhipicephalus sanguineus ticks were acquisition fed on each dog for xenodiagnosis. Blood collected from dogs treated during acute or subclinical CME became PCR negative for E. canis as clinical parameters improved, but blood samples collected from dogs treated during chronic CME remained intermittently PCR positive. R. sanguineus ticks fed on dogs after doxycycline treatments became PCR positive for E. canis, regardless of when treatment was initiated. However, fewer ticks became PCR positive after feeding on two persistently infected dogs treated with doxycycline followed by rifampin, suggesting that antibiotic therapy can reduce tick acquisition of E. canis.

scholarly journals Occurrence of Leishmania chagasi, Trypanosoma cruzi, Babesia canis vogeli, Anaplasma platys, and Ehrlichia canis in canine blood donors

2017 ◽  
Vol 38 (1) ◽  
pp. 295
Author(s):  
Felipe Augusto Constantino Seabra da Cruz ◽  
Amanda Atsumy Funakawa Otsubo ◽  
Yolanda Paim Arruda Trevisan ◽  
Thalita Priscila Peres Seabra Cruz ◽  
Arleana Do Bom Parto Ferreira de Almeida ◽  
...  
Keyword(s):  
Trypanosoma Cruzi ◽  
Clinical Symptoms ◽  
Fluorescent Antibody ◽  
Ehrlichia Canis ◽  
Diagnostic Methods ◽  
Babesia Canis ◽  
Anaplasma Platys ◽  
Leishmania Chagasi ◽  
Veterinary Clinic ◽  
Factors Associated

The transfusion of blood components is common in a veterinary clinic; however, the safety of this therapeutic measure cannot always be guaranteed. Studies show a high risk of haemoparasite transmission during blood transfusion in canines. These parasites include Leishmania chagasi, Anaplasma platys, and Ehrlichia canis, which are endemic to the city of Cuiabá. This study aimed to evaluate the occurrence of L. chagasi, Trypanosoma cruzi, Babesia (canis) vogeli, A. platys, and E. canis in canine blood donor candidates, and identify possible factors associated with the infection of these agents. Sixty-six canines were evaluated using serologic and molecular tests, for the presence of the Leishmania species. While one canine sample showed a positive result for L. chagasi with indirect fluorescent antibody test, with titer of 1:40, and seven canine samples were positive using DPP, all other samples were negative when using PCR and ELISA. All canines were negative for T. cruzi when using PCR. The B. (c.) vogeli infection was identified in one canine and A. platys was identified in six canines. E. canis was identified in 17 canines, with a prevalence of 25.7%. There were no significant factors associated with the infection of the pathogens investigated. Given the observation of infection, even in the absence of clinical symptoms, emphasis must be placed on the need for the use of more sensitive and specific diagnostic methods for the screening of donor canines.

scholarly journals Hematological and histopathological changes in medular aplasia resulting from Ehrlichia canis infection in a Border collie dog

2021 ◽  
Vol 15 (4) ◽  
pp. 275-280
Author(s):  
Carolina Araújo Neves ◽  
Reiner Silveira de Moraes ◽  
Kaline Ogliari ◽  
Antônio Carlos Severino Neto ◽  
Dirceu Guilherme de Souza Ramos ◽  
...  
Keyword(s):  
Bone Marrow ◽  
Adipose Tissue ◽  
Rhipicephalus Sanguineus ◽  
Ehrlichia Canis ◽  
Major Constituent ◽  
Long Bones ◽  
Histopathological Changes ◽  
Canine Monocytic Ehrlichiosis ◽  
The University ◽  
Veterinary Hospital

The Canine Monocytic Ehrlichiosis (CME) is an infectious disease that commonly affects dogs of all breeds and ages. It is caused by the bacterium Ehrlichia canis and is transmitted by the tick Rhipicephalus sanguineus. The disease may pre-sent itself in the acute, subclinical, and chronic forms. The present study reports the case of a 2-year-old male Border Collie with advanced stage CME, attended at the Pet Clinic of the Veterinary Hospital of the University Federal de Jataí, which resul-ted in medullary aplasia. The diagnosis of marrow aplasia was based on the necroscopic and histopathological examinations. At necropsy, the diaphyses of the long bones were filled with diffuse, strongly whitish and pasty tissue, typical of the adipose tissue, also found in the femoral epiphyses. The histopathology showed unilocular adipose tissue as the major constituent of the bone marrow and rare islands of marrow cells. These findings were compatible with severe hypoplasia of the red bone mar-row and hyperplasia of the white bone marrow, affecting hematopoiesis, resulting in the laboratory alterations observed in the hematocrit, WBC, and plateletogram.

scholarly journals Molecular diagnosis and risk factors of canine ehrlichiosis in the municipality of Itabuna-Bahia, Brazil

2020 ◽  
Vol 41 (3) ◽  
pp. 897
Author(s):  
Jeane Martinha dos Anjos Cordeiro ◽  
Paula Elisa Brandão Guedes ◽  
Alexandre Dias Munhoz ◽  
Fabiana Lessa Silva
Keyword(s):  
Risk Factors ◽  
Nested Pcr ◽  
Clinical Signs ◽  
Rhipicephalus Sanguineus ◽  
Nested Polymerase Chain Reaction ◽  
Molecular Tests ◽  
Canine Ehrlichiosis ◽  
Non Governmental Organizations ◽  
Canine Monocytic Ehrlichiosis ◽  
The City

Ehrlichiosis is an emerging zoonosis worldwide and has had several adverse effects on public health. Canine monocytic ehrlichiosis (CME), caused by Ehrlichia canis, has the tick Rhipicephalus sanguineus as the vector. The main clinical signs in affected dogs are fever, apathy, anorexia, weight loss, and neurological signs. The diagnosis is made through the association of clinical signs with parasitological, serological, and molecular tests. The aim of this study was to evaluate the occurrence of E. canis infection in dogs from the city of Itabuna-Bahia, as well as to identify the risk factors related to infection. For this, 405 dogs from the Center for Zoonoses Control (CCZ), non-governmental organizations (NGOs), and dogs domiciled and semi-domiciled in the city of Itabuna, southern Bahia, were evaluated. After initial physical evaluation of the dogs, blood samples were collected by venipuncture for subsequent DNA extraction and E. canis testing using the nested Polymerase Chain Reaction (nested-PCR) technique. In addition, an epidemiological questionnaire that included questions related to the animals was administered to the dog owners to identify the risk factors for exposure to the etiological agent and to the vector. Approximately 17% of the dogs in the municipality of Itabuna-Bahia tested positive for E. canis by nested-PCR, a result higher than that found in other studies conducted in the same municipality. Among the factors associated with E. canis infection, contact with other dogs (p = 0.0226) was an important factor for the dissemination of CME, since dogs are reported to be reservoirs of E. canis. Male dogs (p = 0.0016) presented lower risk for E. canis infection. Other studies, however, describe no association between animal gender and infection by E. canis. Preventive measures to reduce exposure to the vector of ehrlichiosis are necessary.

scholarly journals Molecular epidemiology of Anaplasma platys, Ehrlichia canis and Babesia vogeli in stray dogs in Paraná, Brazil

2017 ◽  
Vol 37 (2) ◽  
pp. 129-136 ◽  
Author(s):  
Claudia M. Ribeiro ◽  
Aldair C. Matos ◽  
Thainá Azzolini ◽  
Everton R. Bones ◽  
Eduardo A. Wasnieski ◽  
...  
Keyword(s):  
Rhipicephalus Sanguineus ◽  
Molecular Study ◽  
Ehrlichia Canis ◽  
Anaplasma Platys ◽  
Amblyomma Cajennense ◽  
Blood Samples ◽  
Babesia Vogeli ◽  
Polymerase Chain ◽  
Hematological Changes ◽  
The City

ABSTRACT: Hemoparasitic infections are tick-borne diseases, which affect animals and humans. Considering the importance of canine hemoparasitic infections in veterinary clinics, this study aimed to determine the occurrence of Anaplasma platys, Ehrlichia canis and Babesia vogeli in blood samples from 182 dogs not domiciled in the city of Pato Branco, southwestern region of Paraná State, Brazil, using polymerase chain reaction (PCR). The prevalence of A. platys and B. vogeli was 32.9% and 10.9% respectively, and A. platys infection prevailed (p<0.001). The number of dogs positive for A. platys was larger in Winter (p<0.05). All blood samples were negative for E. canis. In the dogs, infestation by Amblyomma cajennense predominated over that by Rhipicephalus sanguineus (p<0.001); but there was no significant association between PCR and the variables presence of ticks, sex and age. Dogs infected by A. platys and B. vogeli showed thrombocytopenia, lymphopenia and leukocytosis; but there was no correlation between such hematological changes and infection by hemoparasites. This appears to be the first molecular study that demonstrates the existence of A. platys and B. vogeli in dogs from the southwestern region of Paraná.

scholarly journals Evaluation of in-house ELISA and 11 commercial ELISA kits in the serological diagnosis of COVID-19

2021 ◽  
pp. 39-52
Author(s):  
Waldemar Rastawicki ◽  
Klaudia Płaza ◽  
Adam Pietrusiński
Keyword(s):  
Viral Infections ◽  
Clinical Symptoms ◽  
High Sensitivity ◽  
Diagnostic Methods ◽  
Molecular Diagnostic ◽  
Rt Pcr ◽  
Serum Samples ◽  
Serological Tests ◽  
Igm Antibodies ◽  
Epidemiological Surveys

Introduction: ELISA-Immunoassays can complement the molecular diagnostic methods, and can be one of the important tools of sero-surveillance and vaccine evaluation. The aim of the presented study was to develop in-house ELISA and evaluate 11 commercial ELISA tests for detection of anti-SARS-CoV-2 antibodies in serum samples collected from COVID patients. Methods: In total, 237 serum samples obtained from 165 people with COVID-19 with RT-PCR confirmed SARS-CoV-2 virus infection were used for the study. The specificity of the developed in-house ELISA kit was tested using 170 serum samples obtained from patients with various bacterial and viral infections. The study used an in-house ELISA and 11 commercial ELISA kits developed by various manufacturers. Results: The presented study showed high sensitivity (81.0%) and specificity (97.2%) of the developed in-house kit in relation to the RT-PCR method. The sensitivity of the inhouse test significantly increased (98.1%) when only convalescents - persons at least 3 weeks after COVID-19 were examined. Commercial ELISA kits most frequently detected IgG antibodies (from 44.9% to 89.4%), especially in samples obtained later in the disease, and the least frequent detection of IgM antibodies (from 4.2% to 42.4%). Conclusions: All the presented ELISA kits may be used in serodiagnosis of COVID-19 however the detection of antibodies in individual tests differed quite significantly and was dependent on the period of the disease, on the class of immunoglobulins and the type of antigen used. The sensitivity of serological tests in the IgG class is clearly higher when examining samples obtained at least 2-3 weeks from the onset of clinical symptoms. Searching for IgA antibodies may be useful mainly in the early phase of the disease while IgM antibodies does not provide significant additional information. In the case of asymptomatic or mild infection, the level of antibodies is low which may be the cause problems with the correct interpretation of epidemiological surveys

scholarly journals Molecular detection and genetic variability of Ehrlichia canis in pet dogs in Xinjiang, China

2020 ◽  
Vol 13 (5) ◽  
pp. 916-922
Author(s):  
Qiao Mengfan ◽  
Wang Lixia ◽  
Lei Ying ◽  
Ren Yan ◽  
Cai Kuojun ◽  
...  
Keyword(s):  
Molecular Detection ◽  
Health And Safety ◽  
Rhipicephalus Sanguineus ◽  
Ehrlichia Canis ◽  
Molecular Characteristics ◽  
Rrna Gene ◽  
High Genetic Diversity ◽  
Blood Samples ◽  
Pet Dogs ◽  
Geographical Regions

Background and Aim: As a tick-borne zoonotic pathogen, Ehrlichia canis has already posed a threat to public health and safety. This study aimed to clarify the prevalence and molecular characteristics of E. canis in pet dogs in Xinjiang, China. Materials and Methods: A total of 297 blood samples of pet dogs and 709 skin ticks (Rhipicephalus sanguineus sensu lato) were subjected to molecular detection using PCR for E. canis 16S rRNA gene, and then, positive samples were amplified, sequenced, and phylogenetically analyzed for E. canis gp36 gene. Results: The PCR detection showed that the positive rate of PCR was 12.12% (36/297) in blood samples and 15.23% (108/709) in tick samples, respectively. Based on the phylogenetic analysis of E. canis gp36 protein, these E. canis strains in different geographical regions of the world can be divided into Genogroup I and Genogroup II. Among them, the Xinjiang epidemic strain XJ-6 and 533, 36, 1055, Kasur1, and Jake strains were clustered into subgroup 1.1 of Genogroup I, while the XJ-2, XJ-21, and XJ-35 strains and the TWN1, TWN4, CM180, and CM196 strains were closely related and belonged to subgroup 2.2 of Genogroup II, displaying high genetic diversity. Conclusion: This is the first study focusing on the molecular epidemiology of E. canis infection in pet dogs, which revealed that E. canis infection had been occurred in Xinjiang, China. More importantly, this study confirmed that the substantial variability in immunoreactive protein gp36 from E. canis strains circulating in pet dogs.

scholarly journals SEROPREVALENCE OF CANINE MONOCYTIC EHRLICHIOSIS IN HUNTING DOGS IN THE AUTONOMOUS PROVINCE OF VOJVODINA, SERBIA

2015 ◽  
Vol 7 (1) ◽  
pp. 11-18
Author(s):  
Aleksandar Potkonjak ◽  
Sara Savić ◽  
Ljubica Spasojević Kosić ◽  
Vuk Vračar ◽  
Radmila Kudus ◽  
...  
Keyword(s):  
Rhipicephalus Sanguineus ◽  
Ehrlichia Canis ◽  
Transmitted Infection ◽  
Hunting Dogs ◽  
Mediterranean Countries ◽  
Bacterial Vector ◽  
Canine Monocytic Ehrlichiosis ◽  
Autonomous Province ◽  
Epidemiological Characteristics ◽  
Continental Climate

Canine monocytic ehrlichiosis is a bacterial, vector-transmitted infection caused by Ehrlichia canis. Th e pathogen is mainly transmitted by ticks Rhipicephalus sanguineus. The disease highest distributionis most widely distributed in tropical and subtropical countries but it is also reported in Mediterranean countries of Europe (Spain, France, Italy, Turkey). Temperate continental climate and presence of these tick species are responsible for the maintenance and spreading of canine monocytic ehrlichiosis within the dog population in our region as well. Since hunting dogs are more exposed to tick bites then pet dogs, ed thisour study was conducted with the aims of determining the seroprevalence and basic epidemiological characteristics of monocytic ehrlichiosis infection in the population of hunting dogs, and comparing the obtained results with the results of other authors. This research involved 58 hunting dogs from the region of Autonomous Province of Vojvodina. All dogs were clinically examined and their basic epidemiological characteristics were recorded. Then, blood samples were collected in order to determine the presence of specifi c G class antibodies against Ehrlichia canis antigens. An indirect immunofl uorescence test manufactured by VMRD, U.S.A., was used. In this study, the seroprevalence of monocytic ehrlichiosis in a population of examined hunting dogs from the region of Vojvodina was 13.79%. Th is rate is similar to the seroprevalence of monocytic ehrlichiosis in the general population of dogs in Vojvodina.

Sign in / Sign up

Export Citation Format

Share Document