Kaul S M, Sharma R S, Borgohain B K, Das N S, Verghese T
National Institute of Communicable Diseases, Delhi.
J Commun Dis. 1994 Jun;26(2):68-74.
In the past Assam was devastated by epidemics of Kala-azar. However, inspite of resurgence of this disease in Bihar and neighbouring areas Assam has remained untouched by this disease since the mid 1950s so far. The study undertaken in Kamrup district, sought to provide an entomological explanation for Assam's present freedom from Kala-azar. Sandfly collections were made in 15 villages. Three different methods were used; namely hand collections by aspirator and torch, sticky traps and examination of soft parts of cattle in the villages for mating swarms. 1049 sandflies were collected which did not include any specimens of P. argentipes. The vector of Indian Kala-azar has either been eliminated by continuous insecticide spraying in this high P. falciparum, and chloroquine resistance area or reduced to such low levels of prevalence that routine sampling methods are unable to reveal its presence. The implications of this finding are discussed in relation to Kala-azar control in India, in general.
过去，阿萨姆邦曾遭受黑热病疫情的重创。然而，尽管比哈尔邦及周边地区该疾病有所复发，但自20世纪50年代中期以来，阿萨姆邦至今未受此疾病影响。在卡姆鲁普区开展的这项研究，旨在为阿萨姆邦目前未出现黑热病提供昆虫学方面的解释。在15个村庄进行了白蛉采集。采用了三种不同方法，即使用吸气器和手电筒进行人工采集、粘性诱捕器以及检查村庄里牛的柔软部位以寻找交配群体。共采集到1049只白蛉，其中未包括任何银足白蛉标本。在这个恶性疟原虫高发且存在氯喹耐药性的地区，通过持续喷洒杀虫剂，印度黑热病的传播媒介要么已被消灭，要么已减少到常规采样方法无法检测到其存在的低流行水平。总体而言，针对这一发现对印度黑热病防治工作的影响进行了讨论。
