Transmission and control of vivax malaria in Afghan refugee settlements in Pakistan

被引:36
作者
Rowland, M
Hewitt, S
Durrani, N
Bano, N
Wirtz, R
机构
[1] UN,HIGH COMMISS REFUGEES,ISLAMABAD,PAKISTAN
[2] WALTER REED ARMY INST MED RES,DEPT ENTOMOL,WASHINGTON,DC 20307
关键词
malaria; Plasmodium vivax; Anopheles spp; sporozoite rate; biting rate; control; malathion; lambdacyhalothrin; refugees; Pakistan;
D O I
10.1016/S0035-9203(97)90065-1
中图分类号
R1 [预防医学、卫生学];
学科分类号
1004 ; 120402 ;
摘要
Regular biting collections were conducted in 1993-1994 to investigate seasonal fluctuations in the abundance of anophelines in Afghan refugee villages in north-western Pakistan. Enzyme-linked immunosorbent assays were used to test heads-plus-thoraces for the presence of malaria sporozoites. Anophelines giving positive results for Plasmodium vivax were captured in every month except January. Nine species were positive. Biting rates showed a marked increase in May, after the spring rains, and thus spring transmission of vivax malaria seems certain. However, transmission of vivax malaria reached its peak only after the monsoon in July. To determine the optimal time to control vivax malaria by indoor spraying with residual insecticide, spray campaigns were conducted in either spring or summer in 14 refugee villages. Villages sprayed in July 1994 showed a mean reduction in annual incidence of 62% (95% confidence interval [CI] +/- 6%) relative to the previous year, whereas villages sprayed in April 1994 showed only a 15% reduction (95% CI +/- 32%). Parasite prevalence surveys conducted in April and October 1994 confirmed the greater efficacy of spray campaigns waged in July. The insecticide malathion proved as effective as the pyrethroid lambdacyhalothrin, even though several species of anopheline were resistant to malathion.
引用
收藏
页码:252 / 255
页数:4
相关论文
共 10 条
[1]   Falciparum malaria and climate change in the Northwest Frontier Province of Pakistan [J].
Bouma, MJ ;
Dye, C ;
vanderKaay, HJ .
AMERICAN JOURNAL OF TROPICAL MEDICINE AND HYGIENE, 1996, 55 (02) :131-137
[2]   THE INTERRELATIONSHIP OF PLASMODIUM-FALCIPARUM AND PLASMODIUM-VIVAX IN THE PUNJAB [J].
FOX, E ;
STRICKLAND, GT .
TRANSACTIONS OF THE ROYAL SOCIETY OF TROPICAL MEDICINE AND HYGIENE, 1989, 83 (04) :471-473
[3]   AN ENTOMOLOGICAL INVESTIGATION OF THE LIKELY IMPACT OF CATTLE OWNERSHIP ON MALARIA IN AN AFGHAN REFUGEE CAMP IN THE NORTH-WEST FRONTIER PROVINCE OF PAKISTAN [J].
HEWITT, S ;
KAMAL, M ;
MUHAMMAD, N ;
ROWLAND, M .
MEDICAL AND VETERINARY ENTOMOLOGY, 1994, 8 (02) :160-164
[4]  
Pervez SD., 1989, PAK J HLTH, V26, P73
[5]  
RATHOR HR, 1985, PAKISTAN J MED RES, V24, P115
[6]   CHANGES IN MALATHION RESISTANCE WITH AGE IN ANOPHELES-STEPHENSI FROM PAKISTAN [J].
ROWLAND, M ;
HEMINGWAY, J .
PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY, 1987, 28 (02) :239-247
[7]   Pyrethroid-impregnated bed nets for personal protection against malaria for Afghan refugees [J].
Rowland, M ;
Bouma, M ;
Ducornez, D ;
Durrani, N ;
Rozendaal, J ;
Schapira, A ;
Sondorp, E .
TRANSACTIONS OF THE ROYAL SOCIETY OF TROPICAL MEDICINE AND HYGIENE, 1996, 90 (04) :357-361
[8]   PREVALENCE OF MALARIA IN AFGHAN REFUGEE VILLAGES IN PAKISTAN SPRAYED WITH LAMBDACYHALOTHRIN OR MALATHION [J].
ROWLAND, M ;
HEWITT, S ;
DURRANI, N .
TRANSACTIONS OF THE ROYAL SOCIETY OF TROPICAL MEDICINE AND HYGIENE, 1994, 88 (04) :378-379
[9]   DETECTION OF SPOROZOITES OF PLASMODIUM-VIVAX AND PLASMODIUM-FALCIPARUM IN MOSQUITOS BY ELISA - FALSE POSITIVITY ASSOCIATED WITH BOVINE AND SWINE BLOOD [J].
SOMBOON, P ;
MORAKOTE, N ;
KOOTTATHEP, S ;
TRISANAROM, U .
TRANSACTIONS OF THE ROYAL SOCIETY OF TROPICAL MEDICINE AND HYGIENE, 1993, 87 (03) :322-324
[10]   FIELD-EVALUATION OF ENZYME-LINKED IMMUNOSORBENT ASSAYS FOR PLASMODIUM-FALCIPARUM AND PLASMODIUM-VIVAX SPOROZOITES IN MOSQUITOS (DIPTERA, CULICIDAE) FROM PAPUA-NEW-GUINEA [J].
WIRTZ, RA ;
BURKOT, TR ;
GRAVES, PM ;
ANDRE, RG .
JOURNAL OF MEDICAL ENTOMOLOGY, 1987, 24 (04) :433-437