Simulium exiguum, the Vector of Onchocerca Volvulus on the Rio Micay, Colombia *

Hoyos, Paulina Muños de; Corredor, A; Tidwell, M. A.

doi:10.4269/ajtmh.1980.29.377

Cited by 15 publications

(11 citation statements)

References 0 publications

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“…Both species showed biting preference for the lower limbs. This finding agreed with those of Barreto and others 16 and Tidwell and others, 15 who demonstrated that S. exiguum had a biting preference for the lower limbs. It is necessary to complete the study doing monthly collections to establish the activity peaks throughout the year.…”

Section: Discussionsupporting

confidence: 83%

“…Although not statistically significant, differences between microfilarial densities in iliac crest and scapular region could be linked to the biting preferences of the vector. The finding for the first time of naturally infected S. exiguum corroborates the experimental demonstration by Tidwell and others 15 of this species as a vector in this region. Previous studies had not recorded (Psaroniocompsa) near incrustatum as a human-biting species.…”

Section: Discussionsupporting

confidence: 79%

“…This could partly account for the positivity to O. volvulus found in this locality and the relatively isolated nature of the focus. In contrast with the findings of Tidwell and others, 15 who found two daytime activity peaks between 8:00 AM and 10:00 AM and between 3:00 PM and 5:00 PM, an additional peak was found in this study between 11:00 AM and noon. Both species showed biting preference for the lower limbs.…”

Section: Discussioncontrasting

confidence: 56%

“…Captured adult flies were classified according to species. A rapid entomologic assessment (RENTA) was carried out on August [14][15][16][17]1996 in the community of Naiciona. Female blackflies were collected with an aspirator on two O. volvulus microfilariae positive human baits on four consecutive days during daylight hours between 6:00 AM and 6:00 PM.…”

Section: Methodsmentioning

confidence: 99%

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Current status of onchocerciasis in Colombia.

Corredor¹,

Nicholls²,

Duque³

et al. 1998

The American Journal of Tropical Medicine and Hygiene

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Abstract. To assess the current epidemiologic status of onchocerciasis in Colombia two surveys were undertaken in 1995 in a suspected new focus on the border between Colombia and Ecuador and in the known focus located on the Micay River. No new focus was found along the Colombia-Ecuador border. In the known focus, communities along the upper Micay River and its tributaries were surveyed; 655 adults underwent physical examinations and skin biopsies. Infected individuals were found almost exclusively in the community of Naiciona, where prevalence of infection was 40% (36 of 91). Polymerase chain reaction detection of onchocercal DNA in skin snips correlated with the skin-snip biopsy results. The prevalence of punctate keratitis, the only ocular manifestation found, was 33%. A rapid entomologic assessment demonstrated Simulium exiguum infected with Onchocerca volvulus. This is the first finding in Colombia of naturally infected black flies and confirms S. exiguum as a vector species. These data will be used for implementing a control program using periodic ivermectin distribution.

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Section: Discussionsupporting

confidence: 83%

Section: Discussionsupporting

confidence: 79%

Section: Discussioncontrasting

confidence: 56%

Section: Methodsmentioning

confidence: 99%

See 2 more Smart Citations

Current status of onchocerciasis in Colombia.

Corredor¹,

Nicholls²,

Duque³

et al. 1998

The American Journal of Tropical Medicine and Hygiene

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“…However, no data were available on the degree of susceptibility of this blackfly species to infection with O. volvulus in Venezuela. Apparently such information is needed to compare the vectorial capacity of S. metallicum in Venezuela with that of the same species in Guatemala or Colombia, where this species has been reported to be less important as a vector (De Leon and Duke, 1966;Collins, 1979;Ito et al, 1980;Tidwell et al, 1980).…”

Section: Introduction 89mentioning

confidence: 99%

Susceptibility of Simulium metallicum to infection with Onchocerca volvulus in Venezuela.

Takaoka

Suzuki

Noda

et al. 1984

Jap. J. Trop. Med. Hyg.

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Studies on the biology of Simuliidae (Diptera) at the Santiago onchocerciasis focus in Ecuador, with special reference to the vectors and disease transmission

Shelley

Arzube

1985

Transactions of the Royal Society of Tropical Medicine and Hygi

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A survey showed the presence of seven simuliid species in the onchocerciasis focus in Ecuador Simulium exiguum and S. quadrivittatum were the two most common anthropophilic species and were shown to be both experimental and natural vectors of Onchocerca volvulus. S. antillarum only occasionally bit man. Observations were made on the biology of the two vector species and it was evident that S. exiguum was the primary vector of onchocerciasis in the rainy season. The relevance of these findings to the epidemiology and control of onchocerciasis in Ecuador are discussed.

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Simulium exiguum, the Vector of Onchocerca Volvulus on the Rio Micay, Colombia *

Cited by 15 publications

References 0 publications

Current status of onchocerciasis in Colombia.

Current status of onchocerciasis in Colombia.

Susceptibility of Simulium metallicum to infection with Onchocerca volvulus in Venezuela.

Studies on the biology of Simuliidae (Diptera) at the Santiago onchocerciasis focus in Ecuador, with special reference to the vectors and disease transmission

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