Domestic Rhodnius ecuadoriensis (Hemiptera, Reduviidae) infestation in Northern Peru: a comparative trial of detection methods during a six-month follow-up
Rev. Inst. Med. Trop. Säo Paulo
; Rev. Inst. Med. Trop. Säo Paulo;45(2): 85-90, Mar.-Apr. 2003. ilus, tab
Article
em En
| LILACS
| ID: lil-333183
Biblioteca responsável:
BR1.1
ABSTRACT
Two passive methods in the assessment of intradomiciliary infestation by Rhodnius ecuadoriensis were tested (i) the Gomes Nuñez sensor box (GN), (ii) sheets of white typing paper and (iii) one active timed manual method. The study was carried out in the Alto Chicama River Valley, Province of Gran Chimú, Department of La Libertad. The study design consisted of an initial searching of triatomines inside of the domestic environment by the manual capture active procedure (man/hour) covering all the studied houses. Then, matched pairs of GN boxes and paper sheets were simultaneously installed in the bedrooms of 207 households distributed in 19 localities. A comparative prospective trial of these passive detection devices were monitored at 2, 4 and, finally 6 months follow-up. Parasitological Trypanosoma rangeli and/or T. cruzi infections were investigated in two houses with high level of infestation by R. ecuadoriensis. 16.9 percent of the 207 households investigated by an initial active manual method were infested with R. ecuadoriensis. The proportion of infested houses fluctuated from 6.2 to 55.5 percent amongst the 19 localities investigated. T. rangeli natural infection was detected in R. ecuadoriensis specimens collected in two households. Parasite rates in the bugs ranged from 16.6 to 21.7 percent respectively. The most striking fact was an average rate of salivary gland infection ranging from 7.4 to 8.3 percent. At the end of the sixth month period, a cumulative incidence of 31.4 percent of positive GN boxes against 15.9 percent for paper sheets was recorded. All three methods combined detected domestic infestation in 129 (62.3 percent) of the 207 houses studied in the 19 localities. The range of houses infested varies from 6.7 percent to 92.9 percent. In areas with low bug density infestation rates, the methodology experienced in our studies, seems to be the best choice for investigations on domestic R. ecuadoriensis populations
Texto completo:
1
Coleções:
01-internacional
Base de dados:
LILACS
Assunto principal:
Rhodnius
/
Controle de Insetos
/
Entomologia
/
Insetos Vetores
Tipo de estudo:
Diagnostic_studies
Limite:
Animals
/
Female
/
Humans
/
Male
País/Região como assunto:
America do sul
/
Peru
Idioma:
En
Revista:
Rev. Inst. Med. Trop. Säo Paulo
Assunto da revista:
MEDICINA TROPICAL
Ano de publicação:
2003
Tipo de documento:
Article
País de afiliação:
Brasil
/
Peru
País de publicação:
Brasil