Coupling between Annual and ENSO Timescales in the Malaria: Climate Association in Colombia

Poveda, Germán; Rojas, William; Quiñónes, Martha L.; Vélez, Iván Darío; Mantilla, Ricardo; Ruíz, Daniel; Zuluaga, Juan Ignacio Marín; Rúa, Guillermo

doi:10.2307/3454707

Cited by 20 publications

(14 citation statements)

References 4 publications

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“…The relationship between anopheline abundance and climate is well documented for various regions of the world, particularly for variables such as temperature, RH and rainfall ( Githeko et al , 2000;Kovats et al , 2003 ). In Colombia and Venezuela, malaria epidemics have been associated with increases in tempera ture and reductions in rainfall and river level ( Bouma & Dye, 1997;Poveda et al , 2001 ). Some authors have associated the increased density of An.…”

Section: Discussionmentioning

confidence: 99%

Abundance, biting behaviour and parous rate of anopheline mosquito species in relation to malaria incidence in gold‐mining areas of southern Venezuela

Moreno

Rubio-Palis²,

Páez³

et al. 2007

Medical Vet Entomology

111

108

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A longitudinal entomological and epidemiological study was conducted in five localities of southern Venezuela between January 1999 and April 2000 to determine the abundance, biting behaviour and parity of anopheline mosquitoes (Diptera: Culicidae) in relation to climate variables and malaria incidence. A total of 3685 female anopheline mosquitoes, representing six species, were collected. The most abundant species were Anopheles marajoara Galvão & Damasceno (60.7%) and Anopheles darlingi Root (35.1%), which together represented 95.8% of the total anophelines collected. Abundance and species distribution varied by locality. Malaria prevalence varied from 12.5 to 21.4 cases per 1000 population. Transmission occurred throughout the year; the annual parasite index (API) for the study period was 813.0 cases per 1000 population, with a range of 71.6-2492 per 1000 population, depending on locality. Plasmodium vivax (Grassi & Feletti) (Coccidia: Plasmodiidae) accounted for 78.6% of cases, Plasmodium falciparum (Welch) for 21.4% and mixed infections (Pv+Pf) for < 0.1%. Anopheles marajoara and An. darlingi were more abundant during the rainy season (April-September). There was no significant correlation (P > 0.05) between mosquito abundance and rainfall. Correlations between malaria incidence by parasite species and mosquito abundance were not significant (P > 0.05). Monthly parous rates were similar for An. marajoara and An. darlingi throughout the year, with two peaks that coincided with the dry-rainy transition period and the period of less rain. Peaks in the incidence of malaria cases were observed 1 month after major peaks in biting rates of parous anophelines. Anopheles darlingi engages in biting activity throughout the night, with two minor peaks at 23.00-00.00 hours and 03.00-04.00 hours. Anopheles marajoara has a different pattern, with a biting peak at 19.00-21.00 hours and 76.6% of biting occurring before midnight. Although both vectors bite indoors and outdoors, they showed a highly significant (P < 0.01) degree of exophagic behaviour. The present study constitutes the first effort to characterize the bionomics of anophelines in malaria endemic foci in different ecological situations in relation to malaria transmission in southern Venezuela and to provide relevant information to be considered when planning and implementing vector control programmes.

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Section: Discussionmentioning

confidence: 99%

Abundance, biting behaviour and parous rate of anopheline mosquito species in relation to malaria incidence in gold‐mining areas of southern Venezuela

Moreno

Rubio-Palis²,

Páez³

et al. 2007

Medical Vet Entomology

111

108

View full text Add to dashboard Cite

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“…In contrast, report lower malaria incidence during a strong El Niño year of high rainfall in Tanzania. Meanwhile, El Niño-related droughts have been associated with malaria epidemics in Colombia (Poveda et al, 2001) and Sri Lanka (Bouma and van der Kaay, 1996), Guyana (Gagnon et al, 2002) and with droughts in the preceding year in Venezuela (Bouma and Dye, 1997). Given the complex relationship between rainfall and breeding site formation that can produce differential responses to rainfall within a single country (e.g.…”

Section: Malaria Early Warning Systems From Observed and Predicted Ramentioning

confidence: 99%

Hydrological and geomorphological controls of malaria transmission

Smith

Macklin

Thomas

2013

Earth-Science Reviews

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“…For example, analysis of malaria data from Colombia for 1980–1997 appears to indicate that El Niño events intensify the annual seasonal transmission cycle ( 24 ). Prediction based on El Niño indicators may prove useful for ensuring availability of resources at national levels, in particular, drugs and insecticides, because of the relatively long lead times ( 25 ).…”

Section: Preventive Interventionsmentioning

confidence: 99%