A severe case of cutaneous myiasis in São Gonçalo, Brazil, and a simple technique to extract New World screw-worm Cochliomyia hominivorax (Coquerel) (Diptera: Calliphoridae).

This work describes a severe case of myiasis by Cochliomyia hominivorax (Coquerel) in a 59-year-old patient living in an urban area of São Gonçalo, Rio de Janeiro. The patient had an open wound on the right shoulder parasitized by 287 larvae. In order to remove the larvae, the wound was washed with NaCl and solid vaseline was applied onto the wound and covered with gauze and adhesive tape. After 90 min, the larvae were killed by asphyxiation and were removed using sterile forceps and NaCl. This procedure left the wound completely clean.

Effects of forest fragmentation on dipterofauna (Calliphoridae) at the Reserva Biológica do Tinguá, Nova Iguaçu, RJ.

Samples were collected every month in three different sites of the Reserva Biológica do Tinguá, Brazil: site A was located on the border of the forest and sites B and C were located 1,000 and 500 m, respectively, towards the forest interior. The objective was to determine edge effects on a fragment of the Atlantic Forest. The greatest species richness was observed in sites A and B (23 species), compared with site C (16 species). Site A showed the greatest abundance and constancy, independent of the degree of synanthropy. Asynanthropic species were more abundant and constant in sites B and C. Site B showed the greatest diversity; and sites A and B showed the greatest similarity of populations. There was no significant correlation between Calliphoridae richness and canopy openness except in site C. Richness and abundance were positively correlated with subwood density, except for richness in site B.

Biological activity of neolignans on the post-embryonic development of Chrysomya megacephala.

Phytochemicals endowed with hormonal, antihormonal, or toxic activity are potential agents for insect control. The effect of some neolignans on one of the most prevalent flies in urban areas, which constitutes a menace to public health, was investigated.

Diversity of Calliphoridae (Diptera) in Brazil's Tinguá Biological Reserve.

The Calliphoridae are flies of great ecological, medical and sanitary importance because they are decomposers of organic matter, mechanical vectors of pathogenic agents, and causers of myiasis. This paper attempts to ascertain the diversity of Calliphoridae in the Tinguá Biological Reserve and correlate meteorological data (temperature, relative humidity of the air, and precipitation) with the occurrence of these flies. The study was conducted at a site in the Tinguá Biological Reserve, located in the municipality of Nova Iguaçu, state of Rio de Janeiro, Brazil. Four traps were set up using chicken viscera as bait. The experiment was conducted over the period of May 2001 to April 2002, with two monthly collections. The captured flies were killed with ether and conserved in 70% alcohol and identified in the Laboratory of Diptera Studies (UNIRIO) and the Laboratory of Vector Insect Biology and Control (FIOCRUZ), both headquartered in the city of Rio de Janeiro, RJ, Brazil. A total of 1,987 insects were captured, 37.5% belonging to the family Calliphoridae, 29.4% to Muscidae, 16.0% to Sarcophagidae, and 17.1% to other families. The most representative species found was Phaenicia eximia (47.0%), followed by Hemilucilia semidiaphana (23.6%), Mesembrinella bellardiana (13.7%), Hemilucilia segmentaria (7.5%), Chloroprocta idioidea (4.9%), Chrysomya albiceps (1.2%), Chrysomya megacephala (0.9%), Phaenicia sericata (0.6%), Eumesembrinella sp. (0.5%), and Chrysomya putoria (0.1%). Large numbers of Calliphoridae were noted in May, June, September and January, coinciding with low rainfall and an average temperature of 21.8 to 27.0 degrees C. A negative correlation was found between the number of Calliphoridae captured and meteorological factors.

Diversity of Calliphoridae (Diptera) in Brazil's Tinguá Biological Reserve

Os califorídeos são dípteros de grande importância ecológica e médico-sanitário, em virtude de serem decompositores de matéria orgânica, vetores mecânicos de agentes patogênicos e causadores de miíases. O presente trabalho objetivou verificar a diversidade de califorídeos na Reserva Biológica do Tinguá e correlacionar os dados meteorológicos (temperatura, umidade relativa do ar e precipitação) com a ocorrência desses dípteros. O estudo foi realizado em uma localidade da Reserva Biológica do Tinguá, município de Nova Iguaçu. Foram instaladas quatro armadilhas de captura, utilizando como isca vísceras de frango. O experimento foi conduzido no período de maio/2001 a abril/2002, sendo realizadas duas coletas mensais. Os dípteros capturados foram sacrificados com éter, conservados em álcool 70% e sua identificação ocorreu no Laboratório de Estudo de Dípteros (UNIRIO) e no Laboratório de Biologia e Controle de Insetos Vetores (FIOCRUZ). Foram capturados 1987 insetos pertencentes às famílias Calliphoridae (37,5%), Muscidae (29,4%), Sarcophagidae (16,0%) e outras (17,1%). Phaenicia eximia foi a espécie mais representativa (47,0%), seguida por Hemilucilia semidiaphana (23,6%), Mesembrinella bellardiana (13,7%), Hemilucilia segmentaria (7,5%), Chloroprocta idioidea (4,9%), Chrysomya albiceps (1,2%), Chrysomya megacephala (0,9%), Phaenicia sericata (0,6%), Eumesembrinella sp. (0,5%), e Chrysomya putoria (0,1%). Observou-se um maior percentual de fêmeas (70,6%). Constatou-se elevada incidência de califorídeos em maio, junho, setembro e janeiro, coincidindo com baixa precipitação e temperatura média entre 21,8 e 27,0 ºC. Constatou-se uma correlação negativa entre o número de califorídeos capturados e os fatores meteorológicos.