A survey of mosquitoes breeding in used tires in Spain for the detection of imported potential vector species

2007 ◽  
Vol 32 (1) ◽  
pp. 10-15 ◽  
Author(s):  
D. Roiz ◽  
R. Eritja ◽  
R. Escosa ◽  
J. Lucientes ◽  
E. Marquès ◽  
...  
Keyword(s):  
Vector Species ◽  
Potential Vector

scholarly journals Epidemiology of Lyme Disease

1991 ◽  
Vol 2 (2) ◽  
pp. 58-60
Author(s):  
Dennis J White
Keyword(s):  
Public Health ◽  
Lyme Disease ◽  
Disease Surveillance ◽  
Vector Species ◽  
Potential Vector ◽  
Public Health Agencies ◽  
Laboratory Services ◽  
Health Agencies ◽  
Surveillance Programs ◽  
Risk Of Exposure

Investigation of the epidemiology of Lyme disease depends upon information generated from several sources. Human disease surveillance can be conducted by both passive and active means involving physicians, public health agencies and laboratories. Passive and active tick surveillance programs can document the extent of tick-borne activity, identify the geographic range of potential vector species, and determine the relative risk of exposure to Lyme disease in specific areas. Standardized laboratory services can play an important role in providing data. Epidemiologists can gain a better understanding of Lyme disease through the collection of data from such programs. The interpretation of data and provision of information to the medical and general communities are important functions of public health agencies.

scholarly journals Potential vector species of carp edema virus (CEV)

2019 ◽  
Vol 42 (7) ◽  
pp. 959-964 ◽  
Author(s):  
Marek Matras ◽  
Magdalena Stachnik ◽  
Ewa Borzym ◽  
Joanna Maj‐Paluch ◽  
Michal Reichert
Keyword(s):  
Vector Species ◽  
Potential Vector

scholarly journals Geographical distribution of Culicoides (DIPTERA: CERATOPOGONIDAE) in mainland Portugal: Presence/absence modelling of vector and potential vector species

PLoS ONE ◽  
2017 ◽  
Vol 12 (7) ◽  
pp. e0180606 ◽  
Author(s):  
David W. Ramilo ◽  
Telmo Nunes ◽  
Sara Madeira ◽  
Fernando Boinas ◽  
Isabel Pereira da Fonseca
Keyword(s):  
Geographical Distribution ◽  
Vector Species ◽  
Potential Vector ◽  
Mainland Portugal

scholarly journals Complete mitochondrial genome of a potential vector louse fly, Lipoptena grahami (Diptera, Hippoboscidae)

2021 ◽  
Vol 6 (6) ◽  
pp. 1752-1753
Author(s):  
Mo Wang ◽  
Jishan Wang ◽  
Yingya Guo ◽  
Qinglian Zheng ◽  
Dibo Nouhoum ◽  
...  
Keyword(s):  
Mitochondrial Genome ◽  
Complete Mitochondrial Genome ◽  
Potential Vector

scholarly journals Malaria vector species composition and entomological indices following indoor residual spraying in regions bordering Lake Victoria, Tanzania

2020 ◽  
Vol 19 (1) ◽  
Author(s):  
Charles Kakilla ◽  
Alphaxard Manjurano ◽  
Karen Nelwin ◽  
Jackline Martin ◽  
Fabian Mashauri ◽  
...  
Keyword(s):  
Species Composition ◽  
Vector Control ◽  
Malaria Vector ◽  
Lake Victoria ◽  
Indoor Residual Spraying ◽  
Transmission Risk ◽  
Malaria Vectors ◽  
Vector Species ◽  
Sporozoite Rate ◽  
Pirimiphos Methyl

Abstract Background Vector control through long-lasting insecticidal nets (LLINs) and focal indoor residual spraying (IRS) is a major component of the Tanzania national malaria control strategy. In mainland Tanzania, IRS has been conducted annually around Lake Victoria basin since 2007. Due to pyrethroid resistance in malaria vectors, use of pyrethroids for IRS was phased out and from 2014 to 2017 pirimiphos-methyl (Actellic® 300CS) was sprayed in regions of Kagera, Geita, Mwanza, and Mara. Entomological surveillance was conducted in 10 sprayed and 4 unsprayed sites to determine the impact of IRS on entomological indices related to malaria transmission risk. Methods WHO cone bioassays were conducted monthly on interior house walls to determine residual efficacy of pirimiphos-methyl CS. Indoor CDC light traps with or without bottle rotator were hung next to protected sleepers indoors and also set outdoors (unbaited) as a proxy measure for indoor and outdoor biting rate and time of biting. Prokopack aspirators were used indoors to capture resting malaria vectors. A sub-sample of Anopheles was tested by PCR to determine species identity and ELISA for sporozoite rate. Results Annual IRS with Actellic® 300CS from 2015 to 2017 was effective on sprayed walls for a mean of 7 months in cone bioassay. PCR of 2016 and 2017 samples showed vector populations were predominantly Anopheles arabiensis (58.1%, n = 4,403 IRS sites, 58%, n = 2,441 unsprayed sites). There was a greater proportion of Anopheles funestus sensu stricto in unsprayed sites (20.4%, n = 858) than in sprayed sites (7.9%, n = 595) and fewer Anopheles parensis (2%, n = 85 unsprayed, 7.8%, n = 591 sprayed). Biting peaks of Anopheles gambiae sensu lato (s.l.) followed periods of rainfall occurring between October and April, but were generally lower in sprayed sites than unsprayed. In most sprayed sites, An. gambiae s.l. indoor densities increased between January and February, i.e., 10–12 months after IRS. The predominant species An. arabiensis had a sporozoite rate in 2017 of 2.0% (95% CI 1.4–2.9) in unsprayed sites compared to 0.8% (95% CI 0.5–1.3) in sprayed sites (p = 0.003). Sporozoite rates were also lower for An. funestus collected in sprayed sites. Conclusion This study contributes to the understanding of malaria vector species composition, behaviour and transmission risk following IRS around Lake Victoria and can be used to guide malaria vector control strategies in Tanzania.

scholarly journals Progress towards elimination of lymphatic filariasis in the Americas region

2020 ◽  
Vol 13 (Supplement_1) ◽  
pp. S33-S38
Author(s):  
Gilberto Fontes ◽  
Eliana Maria Mauricio da Rocha ◽  
Ronaldo Guilherme Carvalho Scholte ◽  
Rubén Santiago Nicholls
Keyword(s):  
Dominican Republic ◽  
Lymphatic Filariasis ◽  
Wuchereria Bancrofti ◽  
World Health ◽  
Vector Species ◽  
Effective Coverage ◽  
The Third ◽  
Assessment Survey ◽  
Health Organization ◽  
Important Progress

Abstract In South and Central America, lymphatic filariasis (LF) is caused by Wuchereria bancrofti, which is transmitted by Culex quinquefasciatus, the only vector species in this region. Of the seven countries considered endemic for LF in the Americas in the last decade, Costa Rica, Suriname and Trinidad and Tobago were removed from the World Health Organization list in 2011. The remaining countries, Brazil, Dominican Republic, Guyana and Haiti, have achieved important progress in recent years. Brazil was the first country in the Americas to stop mass drug administration (MDA) and to establish post-MDA surveillance. Dominican Republic stopped MDA in all LF-endemic foci: La Ciénaga and Southwest passed the third Transmission Assessment Survey (TAS) and the Eastern focus passed TAS-1 in 2018. Haiti passed the TAS and interrupted transmission in >80% of endemic communes, achieving effective drug coverage. Guyana implemented effective coverage in MDAs in 2017 and 2018 and in 2019 scaled up the treatment for 100% of the geographical region, introducing ivermectin in the MDA in order to achieve LF elimination by the year 2026. The Americas region is on its way to eliminating LF transmission. However, efforts should be made to improve morbidity management to prevent disability of the already affected populations.

scholarly journals The evolution of hard tick-borne relapsing fever borreliae is correlated with vector species rather than geographical distance

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Ranna Nakao ◽  
Kentaro Kasama ◽  
Bazartseren Boldbaatar ◽  
Yoshitoshi Ogura ◽  
Hiroki Kawabata ◽  
...  
Keyword(s):  
Core Gene ◽  
Genetic Distances ◽  
Hard Tick ◽  
Vector Species ◽  
Relapsing Fever ◽  
Strain Isolation ◽  
Ecological Features ◽  
Geographical Distances ◽  
History Of ◽  
Hokkaido Island

Abstract Background Relapsing fever (RF) borreliae are arthropod-borne spirochetes and some of them cause human diseases, which are characterized by relapsing or recurring episodes of fever. Recently, it has been classified into two groups: soft tick-borne RF (STRF) borreliae and hard tick-borne RF (HTRF) borreliae. STRF borreliae include classical RF agents and HTRF borreliae, the latter of which include B. miyamotoi, a human pathogen recently identified in Eurasia and North America. Results In this study, we determined the genome sequences of 16 HTRF borreliae strains: 15 B. miyamotoi strains (9 from Hokkaido Island, Japan, 3 from Honshu Island, Japan, and 3 from Mongolia) and a Borrelia sp. tHM16w. Chromosomal gene synteny was highly conserved among the HTRF strains sequenced in this study, even though they were isolated from different geographic regions and different tick species. Phylogenetic analysis based on core gene sequences revealed that HTRF and STRF borreliae are clearly distinguishable, with each forming a monophyletic group in the RF borreliae lineage. Moreover, the evolutionary relationships of RF borreliae are consistent with the biological and ecological features of each RF borreliae sublineage and can explain the unique characteristics of Borrelia anserina. In addition, the pairwise genetic distances between HTRF borreliae strains were well correlated with those of vector species rather than with the geographical distances between strain isolation sites. This result suggests that the genetic diversification of HTRF borreliae is attributed to the speciation of vector ticks and that this relationship might be required for efficient transmission of HTRF borreliae within vector ticks. Conclusions The results of the present study, together with those from previous investigations, support the hypothesis that the common ancestor of borreliae was transmitted by hard-bodied ticks and that only STRF borreliae switched to using soft-bodied ticks as a vector, which was followed by the emergence of Borrelia recurrentis, lice-borne RF borreliae. Our study clarifies the phylogenetic relationships between RF borreliae, and the data obtained will contribute to a better understanding of the evolutionary history of RF borreliae.

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