scholarly journals Intensive West Nile Virus Circulation in Serbia in 2018—Results of Integrated Surveillance Program

Pathogens ◽  
2021 ◽  
Vol 10 (10) ◽  
pp. 1294
Author(s):  
Tamaš Petrović ◽  
Milanko Šekler ◽  
Dušan Petrić ◽  
Dejan Vidanović ◽  
Zoran Debeljak ◽  
...  
Keyword(s):  
West Nile Virus ◽  
Early Detection ◽  
Public Health Service ◽  
Mosquito Control ◽  
Wild Birds ◽  
Surveillance Program ◽  
West Nile ◽  
The Public ◽  
Natural Hosts ◽  
Vojvodina Province

The results of the Serbian national integrated West Nile virus (WNV) surveillance program conducted in 2018 and funded by the Serbian Veterinary Directorate are presented. The WNV surveillance program encompassed the entire territory of Serbia and was conducted by the veterinary service in collaboration with entomologists and ornithologists. The objective of the program was early detection of WNV circulation in the environment and timely reporting to the public health service and local authorities to increase clinical and mosquito control preparedness. The program was based on the detection of WNV presence in wild birds (natural hosts) and mosquitoes (virus vectors) and on serological testing of sentinel horses (WNV-specific IgM antibodies). The season 2018 was confirmed to be the season of the most intensive WNV circulation with the highest number and severity of human cases in Serbia ever reported. The most intense WNV circulation was observed in the northern and central parts of Serbia including Vojvodina Province, the Belgrade City area, and surrounding districts, where most positive samples were detected among sentinel animals, mosquitoes and wild birds. The majority of human cases were preceded by the detection of WNV circulation during the surveillance. The WNV surveillance program in 2018 showed satisfactory results in the capacity to indicate the spatial distribution of the risk for humans and sensitivity to early detection of WNV circulation in the environment.

scholarly journals West Nile virus in California, 2003–2018: A persistent threat

2020 ◽  
Vol 14 (11) ◽  
pp. e0008841
Author(s):  
Robert E. Snyder ◽  
Tina Feiszli ◽  
Leslie Foss ◽  
Sharon Messenger ◽  
Ying Fang ◽  
...  
Keyword(s):  
Public Health ◽  
West Nile Virus ◽  
Southern California ◽  
Mosquito Control ◽  
Central Valley ◽  
Surveillance Program ◽  
Prevention Measures ◽  
West Nile ◽  
California Department ◽  
Public Health Agencies

The California Arbovirus Surveillance Program was initiated over 50 years ago to track endemic encephalitides and was enhanced in 2000 to include West Nile virus (WNV) infections in humans, mosquitoes, sentinel chickens, dead birds and horses. This comprehensive statewide program is a function of strong partnerships among the California Department of Public Health (CDPH), the University of California, and local vector control and public health agencies. This manuscript summarizes WNV surveillance data in California since WNV was first detected in 2003 in southern California. From 2003 through 2018, 6,909 human cases of WNV disease, inclusive of 326 deaths, were reported to CDPH, as well as 730 asymptomatic WNV infections identified during screening of blood and organ donors. Of these, 4,073 (59.0%) were reported as West Nile neuroinvasive disease. California’s WNV disease burden comprised 15% of all cases that were reported to the U.S. Centers for Disease Control and Prevention during this time, more than any other state. Additionally, 1,299 equine WNV cases were identified, along with detections of WNV in 23,322 dead birds, 31,695 mosquito pools, and 7,340 sentinel chickens. Annual enzootic detection of WNV typically preceded detection in humans and prompted enhanced intervention to reduce the risk of WNV transmission. Peak WNV activity occurred from July through October in the Central Valley and southern California. Less than five percent of WNV activity occurred in other regions of the state or outside of this time. WNV continues to be a major threat to public and wild avian health in California, particularly in southern California and the Central Valley during summer and early fall months. Local and state public health partners must continue statewide human and mosquito surveillance and facilitate effective mosquito control and bite prevention measures.

scholarly journals Predictive Modeling for West Nile Virus and Mosquito Surveillance in Lubbock, Texas

2018 ◽  
Vol 34 (1) ◽  
pp. 18-24 ◽  
Author(s):  
Steven T. Peper ◽  
Daniel E. Dawson ◽  
Nina Dacko ◽  
Kevan Athanasiou ◽  
Jordan Hunter ◽  
...  
Keyword(s):  
West Nile Virus ◽  
Mosquito Control ◽  
Dew Point ◽  
Surveillance Program ◽  
Vector Surveillance ◽  
West Nile Fever ◽  
West Nile ◽  
Control Programs ◽  
Average Wind ◽  
Effective Decision Making

ABSTRACT West Nile virus (WNV) was first detected in North America during 1999, and has since spread throughout the contiguous USA. West Nile virus causes West Nile fever and the more severe West Nile neuroinvasive disease. As part of a WNV vector surveillance program, we collected mosquitoes in Lubbock, Texas, using CO2-baited encephalitic vector survey (EVS) traps. During 219 wk from 2009 through 2017, EVS traps were operated for 1,748 trap nights, resulting in more than 101,000 mosquitoes captured. Weekly, selected female mosquito specimens were pooled by species and trap site, and screened for WNV using reverse transcription–polymerase chain reaction assay. Mosquitoes positive for WNV were detected during 16.9% (37/219) of the weeks. Using this information, we constructed a statistical model to predict the probability of detecting an infection within a mosquito pool as a factor of weather variables. The final model indicated that detection of WNV in mosquitoes was negatively associated with the week of year squared and average wind from 3 wk prior to sampling, and was positively associated with week of year, average visibility, average humidity from 2 wk prior to sampling, and average dew point from 4 wk prior to sampling. The model developed in this study may aid public health and vector control programs in swift and effective decision making relative to city-wide mosquito control efforts by predicting when the chances of mosquitoes having WNV are at their greatest.

A Snapshot Avian Surveillance Reveals West Nile Virus and Evidence of Wild Birds Participating in Toscana Virus Circulation

2017 ◽  
Vol 17 (10) ◽  
pp. 698-708 ◽  
Author(s):  
Sabri Hacioglu ◽  
Ender Dincer ◽  
Cafer Tayer Isler ◽  
Zeynep Karapinar ◽  
Veysel Soydal Ataseven ◽  
...  
Keyword(s):  
West Nile Virus ◽  
Wild Birds ◽  
Toscana Virus ◽  
West Nile

The survey of wild birds for West Nile virus in Poland

2011 ◽  
Vol 14 (4) ◽  
pp. 573-577 ◽  
Author(s):  
J. Niczyporuk ◽  
E. Samorek-Salamonowicz ◽  
W. Kozdruń ◽  
Z. Mizak
Keyword(s):  
West Nile Virus ◽  
Genetic Material ◽  
Early Spring ◽  
Wild Birds ◽  
Rt Pcr ◽  
West Nile ◽  
Late Autumn ◽  
The Brain

The survey of wild birds for West Nile virus in PolandTwo thousand one hundred and forty birds belonging to 39 different species from different locations in Poland were examined. The study has taken place from the early spring till late autumn 2007-2010 when the activity of the mosquitoes was the highest. The brain samples were taken from the birds and whole cellular RNA was isolated, then the RT-PCR and NRT-PCR were performed to detect the presence of West Nile virus (WNV). The obtained results were confirmed by the commercial WNV Kit. No genetic material of WNV was found in the examined samples.

Surveillance on antibodies against West Nile virus, Usutu virus, tick-borne encephalitis virus and Tribeč virus in wild birds in Drienovská wetland, Slovakia

Biologia ◽  
2019 ◽  
Vol 74 (7) ◽  
pp. 813-820 ◽  
Author(s):  
Tomáš Csank ◽  
Ľuboš Korytár ◽  
Terézia Pošiváková ◽  
Tamás Bakonyi ◽  
Juraj Pistl ◽  
...  
Keyword(s):  
West Nile Virus ◽  
Wild Birds ◽  
Encephalitis Virus ◽  
West Nile ◽  
Usutu Virus ◽  
Tick Borne Encephalitis ◽  
Tick Borne Encephalitis Virus

scholarly journals Emergence of West Nile virus infections in humans in Turkey, 2010 to 2011

2012 ◽  
Vol 17 (21) ◽  
Author(s):  
H Kalaycioglu ◽  
G Korukluoglu ◽  
A Ozkul ◽  
O Oncul ◽  
S Tosun ◽  
...  
Keyword(s):  
West Nile Virus ◽  
Mosquito Control ◽  
Epidemiological Studies ◽  
Control Measures ◽  
Lower Activity ◽  
Virus Infections ◽  
West Nile ◽  
Notifiable Diseases ◽  
Routine Surveillance

In 2010, 47 human cases of West Nile virus (WNV) infection, including 12 laboratory-confirmed and 35 probable cases, were identified in Turkey. These were the first cases detected during routine surveillance. The patients were from 15 provinces, mainly located in the western part of the country. Incidence was 0.19/100,000 with a maximum of 1.39 in Sakarya province. Forty of the total 47 cases showed neuroinvasive manifestation. Median age was 58 years with a range of four to 86. Ten of the patients died. Enhanced surveillance in humans and animals and mosquito control measures were implemented. The WNV infections were included in the national notifiable diseases list as of April 2011. In 2011, three probable and two confirmed cases of WNV infection were diagnosed in provinces where infections had been detected in the previous year, supporting a lower activity than 2010. However, detection of WNV infections in humans in 2010 and 2011 consecutively, may indicate that WNV has become endemic in the western part of Turkey. Field epidemiological studies were undertaken to understand more about the nature of infection in Turkey.

West Nile virus lineage 2 in Sardinian wild birds in 2012: a further threat to public health

2013 ◽  
Vol 141 (11) ◽  
pp. 2313-2316 ◽  
Author(s):  
G. SAVINI ◽  
G. PUGGIONI ◽  
A. DI GENNARO ◽  
G. DI FRANCESCO ◽  
A. M. ROCCHIGIANI ◽  
...  
Keyword(s):  
Public Health ◽  
West Nile Virus ◽  
Sequence Analysis ◽  
Wild Birds ◽  
Homologous Sequence ◽  
West Nile ◽  
Lineage 2 ◽  
High Level

SUMMARYWest Nile virus (WNV) strains belonging to lineage 2 were detected and isolated from the tissues of a goshawk and two carrion crows in Sardinia in August 2012. According to NS3 sequence analysis, the Sardinian isolates shared a high level of similarity with those of Italian lineage 2 strains which circulated in 2011 and with the homologous sequence of the 2004 Hungarian isolate. Following the human fatality reported in 2011 in Olbia, this study is the first to report the spread and enzootic circulation of WNV lineage 2 in Sardinia.

Attempts to detect West Nile virus in wild birds in Poland

2011 ◽  
Vol 59 (3) ◽  
pp. 405-408 ◽  
Author(s):  
Jowita Niczyporuk ◽  
Elżbieta Samorek-Salamonowicz ◽  
Wojciech Kozdruń ◽  
Zbigniew Mizak
Keyword(s):  
West Nile Virus ◽  
Early Spring ◽  
Wild Birds ◽  
Rt Pcr ◽  
West Nile ◽  
Late Autumn ◽  
The Brain

The aim of the study was to attempt the detection of West Nile virus (WNV) in wild birds in Poland. Forty-eight species of 1912 wild birds were used for the investigations. The birds were derived from various locations in Poland from early spring till late autumn of the years 2009–2011. The brain samples were homogenised and cellular RNA was isolated. Two methods (RT-PCR and nested RT-PCR) were used. The presence of WNV RNA was not detected in the samples examined. Additionally, a short analysis of the epizootiological situation regarding the presence of WNV in Poland is presented.

scholarly journals West Nile Virus: An Update on Pathobiology, Epidemiology, Diagnostics, Control and “One Health” Implications

Pathogens ◽  
2020 ◽  
Vol 9 (7) ◽  
pp. 589 ◽  
Author(s):  
Gervais Habarugira ◽  
Willy W. Suen ◽  
Jody Hobson-Peters ◽  
Roy A. Hall ◽  
Helle Bielefeldt-Ohmann
Keyword(s):  
West Nile Virus ◽  
One Health ◽  
Antiviral Treatment ◽  
Disease Outbreaks ◽  
Economic Losses ◽  
West Nile ◽  
Animal Products ◽  
Health Implications ◽  
Natural Hosts ◽  
Control Programmes

West Nile virus (WNV) is an important zoonotic flavivirus responsible for mild fever to severe, lethal neuroinvasive disease in humans, horses, birds, and other wildlife species. Since its discovery, WNV has caused multiple human and animal disease outbreaks in all continents, except Antarctica. Infections are associated with economic losses, mainly due to the cost of treatment of infected patients, control programmes, and loss of animals and animal products. The pathogenesis of WNV has been extensively investigated in natural hosts as well as in several animal models, including rodents, lagomorphs, birds, and reptiles. However, most of the proposed pathogenesis hypotheses remain contentious, and much remains to be elucidated. At the same time, the unavailability of specific antiviral treatment or effective and safe vaccines contribute to the perpetuation of the disease and regular occurrence of outbreaks in both endemic and non-endemic areas. Moreover, globalisation and climate change are also important drivers of the emergence and re-emergence of the virus and disease. Here, we give an update of the pathobiology, epidemiology, diagnostics, control, and “One Health” implications of WNV infection and disease.

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