guianense is reported here for the first time in the states of Piaui and Ceara, in the Parnaiba River hydrographic basin (Table 1).
vittatum species complex, is one of the most abundant and widespread species of Simulium
flies in North America (36).
Pt II: Description of males, females and pupae of Simulium
rufibasis Brunetti, its variety fasciatum nov.
The biting cycles, infective biting density and transmission potential of "forest" Simulium
Prevention: Avoid Third World communities, particularly those located within 10-20 km of fast flowing rivers in which Simulium
prefers to breed.
The location of the Onchocerca nodules on human body has however been correlated with the biting preference of human parts by Simulium
Along free-flowing rivers Larvae develop well in aerated water Loiasis (Fig.
In this study, the acute toxicity of the (+) and (-) enantiomers and the racemic mixture of fipronil were assessed using Ceriodaphnia dubia (water flea), Simulium
vittatum IS-7 (black fly), Xenopus laevis (African clawed frog), Palaemonetes pugio (grass shrimp), Mercenaria mercenaria (hardshell clam), and Dunaliella tertiolecta (phytoplankton).
Onchocerciasis (river blindness) is a terminally blinding disease caused by Onchocerca volvulus and it is transmitted by members of Simulium
damnosum sensu lato in west Africa (1,2).
A contribution to the study of Simulium
and Culicoides of Rio de Janeiro: Monthly incidence and biting activity.
The five most common drifting taxa (excluding terrestrial insects) were Baetis (Ephemeroptera: Baetidae), Simulium
(Diptera: Simuliidae), Trombidiformes, Orthocladiinae (Diptera: Chironomidae), and Hydropsyche (Trichoptera: Hydropsychidae); composing 45, 13, 13, 9, and 3% of the total, respectively.
neavei--transmitted onchocerciasis: HIV infection increases severity of onchocercal skin disease in a small sample of patients.
Using the ADEM method during Fall 2002, Grants Mill had 53% Elimia, a pleurocerid snail; using the EPA method during Spring 2002, Caldwell Mill had 76% Simulium
, a blackfly larva; using the Riffle/Run method during Fall 2002, Below the Cahaba WWTP had 71% Elimia; using the ADEM method during Fall 2002, Bains Bridge had 67% Somatogyrus.
The EO area is known to support the breeding of 11 species of blackflies including the Simulium
damnosum complex, which is the main vector of endemic onchocerciasis in south-eastern Nigeria (13).
Preliminary evaluation of the repellent activity of some plant essential oils against Simulium