scholarly journals Brazilian Spotted Fever with an Approach in Veterinary Medicine and One Health Perspective

2016 ◽  
Vol 2016 ◽  
pp. 1-7 ◽  
Author(s):  
Sabrina Destri Emmerick Campos ◽  
Nathalie Costa da Cunha ◽  
Nádia Regina Pereira Almosny
Keyword(s):  
Public Health ◽  
One Health ◽  
Spotted Fever ◽  
Rhipicephalus Sanguineus ◽  
Holistic Approach ◽  
Zoonotic Diseases ◽  
Rickettsial Infection ◽  
Brazilian Spotted Fever ◽  
Vector Borne

There is increasing interaction between man and pathogens transmitted by arthropods, especially by ticks. It is on this background that a holistic approach stands out, for the sake of Public Health. Brazilian Spotted Fever is an endemic disease at the country’s southeast, withAmblyomma sculptumas its major contributor, followed byA. aureolatumand potentiallyRhipicephalus sanguineus. Dogs have been considered sentinels, and in some areas the disease in dogs can precede human disease. Considering the importance of this disease for human health, the serological evidence in dogs, and the transmission of ticks between dogs and their owners, this review aimed to elucidate the importance of the epidemiological investigation, the diagnosis in dogs, and the role of veterinarians in Public Health to control vector-borne zoonotic diseases. We encourage veterinarians to include this rickettsial infection in the diagnosis of febrile diseases of common occurrence in dogs.

scholarly journals First identification of natural infection of Rickettsia rickettsii in the Rhipicephalus sanguineus tick, in the State of Rio de Janeiro

2009 ◽  
Vol 29 (2) ◽  
pp. 105-108 ◽  
Author(s):  
Nathalie C. Cunha ◽  
Adivaldo H. Fonseca ◽  
Jania Rezende ◽  
Tatiana Rozental ◽  
Alexsandra R.M. Favacho ◽  
...  
Keyword(s):  
Rio De Janeiro ◽  
Natural Infection ◽  
Spotted Fever ◽  
Pcr Amplification ◽  
Rhipicephalus Sanguineus ◽  
Rickettsia Rickettsii ◽  
Protein Encoding ◽  
Pcr Products ◽  
Brazilian Spotted Fever

The Brazilian Spotted Fever (BSF) is a zoonotic disease caused by Rickettsia rickettsii and transmitted by ticks of the genus Amblyomma, more frequently, Amblyomma cajennense. The aim of this paper was to report the first molecular detection of R. rickettsii on R. sanguineus naturally infected in Rio de Janeiro, Brazil. Ticks were collected from dogs in a rural region of Resende municipality, Rio de Janeiro State, Brazil (22º30'9.46"S, 44º42'44.29"WO), where occurred five human cases of BSF in 2006. The ticks were identified under a stereoscopic microscope and separated in pools by stages, species and sex. DNA extraction was carried out using QIAamp DNA Mini Kit (QIAGEN®). The DNA was submitted to PCR amplification using 04 set of primers: Rr190.70p/Rr190.602n (OmpA, 532bp), BG1-21/BG2-20 (OmpB, 650bp), Tz15/Tz16 (17 kDa protein-encoding gene, 246bp) and RpCS.877p/RpCS.1258n (gltA, 381bp). PCR products were separated by electrophoresis on 1% agarose gels and visualized under ultraviolet light with ethidium bromide. PCR products of the expected sizes were purified by QIAquick® and sequenced by ABI PRISM®. The generated nucleotide sequences were edited with using Bioedit® software and compared with the corresponding homologous sequences available through GenBank, using Discontiguous Mega Blast (http://www.ncbi.nlm.nih.gov). It was confirmed R. rickettsii by sequencing of the material (GenBank FJ356230). The molecular characterization of R. rickettsii in the tick R. sanguineus emphasizes the role of dogs as carriers of ticks from the environment to home. Moreover, this result suggests that there is a considerable chance for active participation of R. sanguineus as one of tick species in the transmission of R. ricketsii to human being in the Brazilian territory.

scholarly journals Prioritization of zoonotic diseases of public health significance in Nigeria using the one-health approach

One Health ◽  
2021 ◽  
pp. 100257
Author(s):  
Chikwe Ihekweazu ◽  
Charles Akataobi Michael ◽  
Patrick M. Nguku ◽  
Ndadilnasiya Endie Waziri ◽  
Abdulrazaq Garba Habib ◽  
...  
Keyword(s):  
Public Health ◽  
One Health ◽  
Zoonotic Diseases ◽  
Public Health Significance ◽  
Health Significance ◽  
The One

A proposal to leverage high-quality veterinary diagnostic laboratory large data streams for animal health, public health, and One Health

2021 ◽  
pp. 104063872110030
Author(s):  
Craig N. Carter ◽  
Jacqueline L. Smith
Keyword(s):  
Public Health ◽  
Data Streams ◽  
One Health ◽  
Animal Health ◽  
Disease Outbreaks ◽  
Large Data ◽  
Health Impact ◽  
The United States ◽  
Zoonotic Diseases ◽  
Diagnostic Laboratory

Test data generated by ~60 accredited member laboratories of the American Association of Veterinary Laboratory Diagnosticians (AAVLD) is of exceptional quality. These data are captured by 1 of 13 laboratory information management systems (LIMSs) developed specifically for veterinary diagnostic laboratories (VDLs). Beginning ~2000, the National Animal Health Laboratory Network (NAHLN) developed an electronic messaging system for LIMS to automatically send standardized data streams for 14 select agents to a national repository. This messaging enables the U.S. Department of Agriculture to track and respond to high-consequence animal disease outbreaks such as highly pathogenic avian influenza. Because of the lack of standardized data collection in the LIMSs used at VDLs, there is, to date, no means of summarizing VDL large data streams for multi-state and national animal health studies or for providing near-real-time tracking for hundreds of other important animal diseases in the United States that are detected routinely by VDLs. Further, VDLs are the only state and federal resources that can provide early detection and identification of endemic and emerging zoonotic diseases. Zoonotic diseases are estimated to be responsible for 2.5 billion cases of human illness and 2.7 million deaths worldwide every year. The economic and health impact of the SARS-CoV-2 pandemic is self-evident. We review here the history and progress of data management in VDLs and discuss ways of seizing unexplored opportunities to advance data leveraging to better serve animal health, public health, and One Health.

scholarly journals Presence of Rickettsia Species in a Marginalized Area of Yucatan, Mexico

2018 ◽  
Vol 2018 ◽  
pp. 1-4 ◽  
Author(s):  
Gaspar Peniche-Lara ◽  
Bertha Jimenez-Delgadillo ◽  
Claudia Munoz-Zanzi ◽  
María Cárdenas-Marrufo ◽  
Carlos Pérez-Osorio ◽  
...  
Keyword(s):  
Rural Areas ◽  
Close Contact ◽  
Rhipicephalus Sanguineus ◽  
Conventional Polymerase Chain Reaction ◽  
Epidemiological Studies ◽  
Serum Samples ◽  
Rickettsial Infection ◽  
Rickettsia Species ◽  
Vector Borne Diseases ◽  
Vector Borne

In the state of Yucatan, Mexico, rickettsiosis has become a common vector-borne disease in the general population. Ectoparasite species such as Rhipicephalus sanguineus and Amblyomma mixtum have been identified as Rickettsia vectors in Yucatan by studies focused on the wild animal population in rural areas. There have been studies that have tried to determine the presence of Rickettsia species in ectoparasites collected in Yucatan, but these studies did not include marginalized areas, where living in close contact with domestic and peridomestic animals that carry ectoparasites is a high-risk factor for acquiring rickettsial infection or many other vector-borne diseases. We evaluated the vector diversity and the presence of Rickettsia species presence in the ectoparasite population that parasitizes domestic animals in a marginalized rural town of Yucatan, Mexico; we also evaluated the seroprevalence of rickettsial antibodies in the human population of this town in order to determine the prevalence of rickettsial infection. A total of 437 ectoparasites were collected from the study area. The tick specimens collected belonged to the species Rhipicephalus sanguineus (n=380, 49 positive), Amblyomma mixtum (n=3, 0 positive), Ixodes affinis (n=4, 0 positive), Ctenocephalides felis (n=33, 0 positive), and Trichodectes canis (n=17, 0 positive). Conventional polymerase chain reaction and sequencing were used to identify the DNA of Rickettsia. Six out of 354 (1.8%) serum samples were positive for antibody to R. typhi. The combination of low antibody titers and the presence of Rickettsia species infecting ectoparasite species found in the study area requires eco-epidemiological studies and the identification of potentially protective practices or habits.

scholarly journals Rickettsial infection in Amblyomma cajennense ticks and capybaras (Hydrochoerus hydrochaeris) in a Brazilian spotted fever-endemic area

2014 ◽  
Vol 7 (1) ◽  
pp. 7 ◽  
Author(s):  
Felipe S Krawczak ◽  
Fernanda A Nieri-Bastos ◽  
Fernanda P Nunes ◽  
João F Soares ◽  
Jonas Moraes-Filho ◽  
...  
Keyword(s):  
Endemic Area ◽  
Spotted Fever ◽  
Amblyomma Cajennense ◽  
Rickettsial Infection ◽  
Hydrochoerus Hydrochaeris ◽  
Brazilian Spotted Fever

scholarly journals Strengthening the One Health Agenda: The Role of Molecular Epidemiology in Aspergillus Threat Management

Genes ◽  
2018 ◽  
Vol 9 (7) ◽  
pp. 359 ◽  
Author(s):  
Eta Ashu ◽  
Jianping Xu
Keyword(s):  
Public Health ◽  
Molecular Epidemiology ◽  
One Health ◽  
Species Level ◽  
Aspergillus Species ◽  
Diagnostic Tools ◽  
Health Initiative ◽  
Threat Management ◽  
The One

The United Nations’ One Health initiative advocates the collaboration of multiple sectors within the global and local health authorities toward the goal of better public health management outcomes. The emerging global health threat posed by Aspergillus species is an example of a management challenge that would benefit from the One Health approach. In this paper, we explore the potential role of molecular epidemiology in Aspergillus threat management and strengthening of the One Health initiative. Effective management of Aspergillus at a public health level requires the development of rapid and accurate diagnostic tools to not only identify the infecting pathogen to species level, but also to the level of individual genotype, including drug susceptibility patterns. While a variety of molecular methods have been developed for Aspergillus diagnosis, their use at below-species level in clinical settings has been very limited, especially in resource-poor countries and regions. Here we provide a framework for Aspergillus threat management and describe how molecular epidemiology and experimental evolution methods could be used for predicting resistance through drug exposure. Our analyses highlight the need for standardization of loci and methods used for molecular diagnostics, and surveillance across Aspergillus species and geographic regions. Such standardization will enable comparisons at national and global levels and through the One Health approach, strengthen Aspergillus threat management efforts.

scholarly journals Endothelial Exosome Plays a Functional Role during Rickettsial Infection

mBio ◽  
2021 ◽  
Vol 12 (3) ◽  
Author(s):  
Yakun Liu ◽  
Changcheng Zhou ◽  
Zhengchen Su ◽  
Qing Chang ◽  
Yuan Qiu ◽  
...  
Keyword(s):  
Endothelial Cells ◽  
Functional Role ◽  
Spotted Fever ◽  
Endothelial Barrier ◽  
Normal Brain ◽  
Spotted Fever Group ◽  
Sequencing Analysis ◽  
Barrier Dysfunction ◽  
Rickettsial Infection

ABSTRACT Spotted fever group rickettsioses (SFRs) are devastating human infections. Vascular endothelial cells (ECs) are the primary targets of rickettsial infection. Edema resulting from EC barrier dysfunction occurs in the brain and lungs in most cases of lethal SFR, but the underlying mechanisms remain unclear. The aim of the study was to explore the potential role of Rickettsia-infected, EC-derived exosomes (Exos) during infection. Using size exclusion chromatography (SEC), we purified Exos from conditioned, filtered, bacterium-free media collected from Rickettsia parkeri-infected human umbilical vein ECs (HUVECs) (R-ECExos) and plasma of Rickettsia australis- or R. parkeri-infected mice (R-plsExos). We observed that rickettsial infection increased the release of heterogeneous plsExos, but endothelial exosomal size, morphology, and production were not significantly altered following infection. Compared to normal plsExos and ECExos, both R-plsExos and R-ECExos induced dysfunction of recipient normal brain microvascular ECs (BMECs). The effect of R-plsExos on mouse recipient BMEC barrier function is dose dependent. The effect of R-ECExos on human recipient BMEC barrier function is dependent on the exosomal RNA cargo. Next-generation sequencing analysis and stem-loop quantitative reverse transcription-PCR (RT-qPCR) validation revealed that rickettsial infection triggered the selective enrichment of endothelial exosomal mir-23a and mir-30b, which potentially target the endothelial barrier. To our knowledge, this is the first report on the functional role of extracellular vesicles following infection by obligately intracellular bacteria. IMPORTANCE Spotted fever group rickettsioses are devastating human infections. Vascular endothelial cells are the primary targets of infection. Edema resulting from endothelial barrier dysfunction occurs in the brain and lungs in most cases of lethal rickettsioses, but the underlying mechanisms remain unclear. The aim of the study was to explore the potential role of Rickettsia-infected, endothelial cell-derived exosomes during infection. We observed that rickettsial infection increased the release of heterogeneous plasma Exos, but endothelial exosomal size, morphology, and production were not significantly altered following infection. Rickettsia-infected, endothelial cell-derived exosomes induced dysfunction of human recipient normal brain microvascular endothelial cells. The effect is dependent on the exosomal RNA cargo. Next-generation sequencing analysis revealed that rickettsial infection triggered the selective enrichment of endothelial exosomal mir-23a and mir-30b, which potentially target the endothelial barrier. To our knowledge, this is the first report on the functional role of extracellular vesicles following infection by obligately intracellular bacteria.

scholarly journals Endothelial exosome plays functional role during rickettsial infection

2020 ◽  
Author(s):  
Yakun Liu ◽  
Changcheng Zhou ◽  
Zhengchen Su ◽  
Qing Chang ◽  
Yuan Qiu ◽  
...  
Keyword(s):  
Endothelial Cells ◽  
Functional Role ◽  
Spotted Fever ◽  
Endothelial Barrier ◽  
Normal Brain ◽  
Spotted Fever Group ◽  
Sequencing Analysis ◽  
Barrier Dysfunction ◽  
Rickettsial Infection

AbstractSpotted fever group rickettsioses (SFRs) are devastating human infections. Vascular endothelial cells (ECs) are the primary targets of infection. Edema resulting from EC barrier dysfunction occurs in the brain and lungs in most cases of lethal SFR, but the underlying mechanisms remain unclear. The aim of the study is to explore the potential role of Rickettsia (R)-infected, EC-derived exosomes (Exos) during infection. Using size-exclusion chromatography (SEC), we purified Exos from conditioned, filtered, bacteria-free media collected from R-infected human umbilical vein ECs (HUVECs) (R-ECExos) and plasma of R-infected mice (R-plsExos). We observed that rickettsial infection increases the release of heterogeneous plsExos, but endothelial exosomal size, morphology, and production were not significantly altered following infection. Compared to normal plsExos and ECExos, both R-plsExos and R-ECExos induced dysfunction of recipient normal brain microvascular Ecs (BMECs). The effect of R-plsExos on mouse recipient BMEC barrier function is dose-dependent. The effect of R-ECExos on human recipient BMEC barrier function is dependent on exosomal RNA cargo. Next-generation sequencing analysis and stem-loop quantitative reverse transcription PCR (RT-qPCR) validation revealed that R infection triggered the selective enrichment of endothelial exosomal mir-23a and mir-30b, which target the endothelial barrier. To our knowledge, this is the first report on the functional role of extracellular vesicles following infection by obligately intracellular bacteria.ImportanceSpotted fever group rickettsioses are devastating human infections. Vascular endothelial cells are the primary targets of infection. Edema resulting from endothelial barrier dysfunction occurs in the brain and lungs in most cases of lethal rickettsioses, but the underlying mechanisms remain unclear. The aim of the study is to explore the potential role of Rickettsia-infected, endothelial cell-derived exosomes during infection. We observed that rickettsial infection increases the release of heterogeneous plasma Exos, but endothelial exosomal size, morphology, and production were not significantly altered following infection. Rickettsia-infected, endothelial cell-derived exosomes induced dysfunction of recipient normal brain microvascular endothelial cells. The effect is dependent on exosomal RNA cargo. Next-generation sequencing analysis revealed that rickettsial infection triggered the selective enrichment of endothelial exosomal mir-23a and mir-30b, which target the endothelial barrier. To our knowledge, this is the first report on the functional role of extracellular vesicles following infection by obligately intracellular bacteria.

scholarly journals Occurrence of Escherichia coli in cloacal samples of broiler chicken from Kollam and Kottayam districts

2021 ◽  
Vol 52 (4) ◽  
Author(s):  
Afsal S. ◽  
Latha C. ◽  
Sethulekshmi C. ◽  
Binsy M. ◽  
Beena C. J. ◽  
...  
Keyword(s):  
Foodborne Pathogens ◽  
Broiler Chicken ◽  
One Health ◽  
Holistic Approach ◽  
Cloacal Swab ◽  
Zoonotic Diseases ◽  
Foodborne Illness ◽  
Culture Techniques ◽  
E Coli ◽  
Conventional Culture

Foodborne pathogens like E. coli are considered as the major causes of foodborne illness in humans worldwide. The present study was undertaken to determine the occurrence of E. coli in cloacal samples of broiler chicken from Kollam and Kottayam districts. The occurrence of E. coli in cloacal samples from broiler chicken was 76.5 per cent from Kollam and 79 per cent from Kottayam through culture techniques. Out of the total 400 cloacal swab samples collected from broiler chicken, 77.8 per cent were positive for E. coli. The samples which were subjected to conventional culture techniques were further analysed for PCR confirmation. The study revealed that, 56.5 and 67 per cent samples were positive for E. coli from Kollam and Kottayam, respectively. An overall occurrence of 61.8 per cent out of 400 samples were confirmed for E. coli by PCR. One Health approach can be used as a suitable tool to combat the foodborne zoonotic diseases, since it is an integrated, multidisciplinary, holistic approach. Proper implementation of biosecurity measures in farms is mandatory to control foodborne zoonotic diseases.

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