Determinants of the population growth of the West Nile virus mosquito vector Culex pipiens in a repeatedly affected area in Italy

被引:23
作者
Mulatti, Paolo [1 ]
Ferguson, Heather M. [2 ]
Bonfanti, Lebana [1 ]
Montarsi, Fabrizio [1 ]
Capelli, Gioia [1 ]
Marangon, Stefano [1 ]
机构
[1] Ist Zooprofilatt Sperimentale Venezie, I-35020 Legnaro, Padua, Italy
[2] Univ Glasgow, Inst Biodivers Anim Hlth & Comparat Med, Glasgow G12 8QQ, Lanark, Scotland
来源
PARASITES & VECTORS | 2014年 / 7卷
关键词
Culex pipiens; Culicidae; Mosquito population dynamics; Density dependence; West nile virus; Disease vectors; CLIMATE-CHANGE; ABUNDANCE; DYNAMICS; PATTERNS; DIPTERA; BORNE; EPIDEMIOLOGY; ECOLOGY; DENSITY; REGION;
D O I
10.1186/1756-3305-7-26
中图分类号
R38 [医学寄生虫学]; Q [生物科学];
学科分类号
07 ; 0710 ; 09 ; 100103 ;
摘要
Background: The recent spread of West Nile Virus in temperate countries has raised concern. Predicting the likelihood of transmission is crucial to ascertain the threat to Public and Veterinary Health. However, accurate models of West Nile Virus (WNV) expansion in Europe may be hampered by limited understanding of the population dynamics of their primary mosquito vectors and their response to environmental changes. Methods: We used data collected in north-eastern Italy (2009-2011) to analyze the determinants of the population growth rate of the primary WNV vector Culex pipiens. A series of alternative growth models were fitted to longitudinal data on mosquito abundance to evaluate the strength of evidence for regulation by intrinsic density-dependent and/or extrinsic environmental factors. Model-averaging algorithms were then used to estimate the relative importance of intrinsic and extrinsic variables in describing the variations of per-capita growth rates. Results: Results indicate a much greater contribution of density-dependence in regulating vector population growth rates than of any environmental factor on its own. Analysis of an average model of Cx. pipiens growth revealed that the most significant predictors of their population dynamics was the length of daylight, estimated population size and temperature conditions in the 15 day period prior to sampling. Other extrinsic variables (including measures of precipitation, number of rainy days, and humidity) had only a minor influence on Cx. pipiens growth rates. Conclusions: These results indicate the need to incorporate density dependence in combination with key environmental factors for robust prediction of Cx. pipiens population expansion and WNV transmission risk. We hypothesize that detailed analysis of the determinants of mosquito vector growth rate as conducted here can help identify when and where an increase in vector population size and associated WNV transmission risk should be expected.
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页数:11
相关论文
共 57 条
  • [1] Effects of density and larval competition on selected life history traits of Culex pipiens quinquefasciatus (Diptera: Culicidae)
    Agnew, P
    Haussy, C
    Michalakis, Y
    [J]. JOURNAL OF MEDICAL ENTOMOLOGY, 2000, 37 (05) : 732 - 735
  • [2] West Nile virus epidemic in horses, Tuscany region, Italy
    Autorino, GL
    Battisti, A
    Deubel, V
    Ferrari, G
    Forletta, R
    Giovannini, A
    Lelli, R
    Murri, S
    Scicluna, MT
    [J]. EMERGING INFECTIOUS DISEASES, 2002, 8 (12) : 1372 - 1378
  • [3] BASE TEMPERATURE SELECTION FOR THE PREDICTION OF EUROPEAN CORN-BORER INSTARS BY THE GROWING DEGREE-DAY METHOD
    BAKER, DG
    SHARRATT, BS
    CHIANG, HC
    ZANDLO, JA
    RUSCHY, DL
    [J]. AGRICULTURAL AND FOREST METEOROLOGY, 1984, 32 (01) : 55 - 60
  • [4] Benincasa F, 1991, AGROMETEOROLOGIA
  • [5] Climate changes, environment and infection: Facts, scenarios and growing awareness from the public health community within Europe
    Bezirtzoglou, Christos
    Dekas, Konstantinos
    Charvalos, Ekatherina
    [J]. ANAEROBE, 2011, 17 (06) : 337 - 340
  • [6] Spatio-temporal patterns of distribution of West Nile virus vectors in eastern Piedmont Region, Italy
    Bisanzio, Donal
    Giacobini, Mario
    Bertolotti, Luigi
    Mosca, Andrea
    Balbo, Luca
    Kitron, Uriel
    Vazquez-Prokopec, Gonzalo M.
    [J]. PARASITES & VECTORS, 2011, 4
  • [7] Blitvich Bradley J., 2008, Animal Health Research Reviews, V9, P71, DOI 10.1017/S1466252307001430
  • [8] Chikungunya virus in Aedes albopictus, Italy
    Bonilauri, Paolo
    Bellini, Romeo
    Calzolari, Mattia
    Angeflni, Raffaella
    Venturi, Luciano
    Fallacara, Francesca
    Cordioli, Paolo
    Angelini, Paola
    Venturolli, Claudio
    Merialdi, Giuseppe
    Dottori, Michele
    [J]. EMERGING INFECTIOUS DISEASES, 2008, 14 (05) : 852 - 854
  • [9] Brook BW, 2006, ECOLOGY, V87, P1445, DOI 10.1890/0012-9658(2006)87[1445:SOEFDD]2.0.CO
  • [10] 2