An investigation into the behaviour of Anopheles parensis Gillies at Malindi on the Kenya coast.
An investigation into the behaviour of Anopheles parensis Gillies at Malindi on the Kenya coast.
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DOI：
10.1017/s0007485300049221
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发表时间：
1964-01-01
影响因子：
1.9
通讯作者：
Furlong, M.
中科院分区：
文献类型：
--
作者：
Gillies, M. T.;Furlong, M.
在1962年1月至11月期间进行的研究中（本文给出了其全部细节），发现在1961年3月至1962年10月期间对房屋喷洒滴滴涕的地区，有大量的父母按蚊叮咬人类。那些村庄外的人口密度最大。A. parensis与A. funestus。没有证据表明A。在喷洒区，平腹蛛是疟疾的外嗜性媒介，鉴于在未喷洒区捕获的样本中观察到的未产率很高，认为该物种在正常条件下不太可能作为重要的媒介。F. I. C.以下内容几乎完全基于作者的总结。在1962年1月至11月进行的一次调查中，主要是通过在下午5点至上午8点之间进行的标准通宵捕捞，亲本按蚊吉利斯[R.A.E.，B 51 105]在肯尼亚马林迪附近的一个地区被发现大量咬人，1961年3月至1962年10月期间，该地区的房屋被喷洒滴滴涕。村庄外的密度最大，房子的阳台上和室内的密度最小。然而，在一个开放式的未喷洒的房子里，捕捉到了相当大的数量。两名男子每晚的月平均捕获量在7月和8月的户外最大（超过200）。在所有情况下，在日落后的两个小时和日出前的三个小时，渔获量最大。傍晚高峰是最高的户外渔获量，和深夜高峰在室内收集。一个明显的影响，月光上的渔获量观察，傍晚高峰在某些条件下更大的月亮的第一季度和深夜高峰在其最后一个季度。在喷洒区和未喷洒村中，未产雌虫的比例分别为64%和50%，在未喷洒村中，类似A. funestus Giles（其中大多数是该物种）。loc.同上]）未发现A. parensis在喷洒区或在一个小系列解剖从未喷洒的村庄。因此，没有证据表明A。在喷洒区，Parensis是疟疾的外嗜性媒介。此外，鉴于在未喷洒地区观察到的高未产率，认为该物种在正常情况下不太可能有任何重要性。
In studies made between January and November 1962, full details of which are given in this paper, Anopheles parensis was found in large numbers biting man in an area in which the spraying of houses with DDT had been carried out between March 1961 and October 1962. Densities were greatest just outside the villages. It seemed possible that the high density of A. parensis was linked with the disappearance of A. funestus. There was no evidence that A. parensis was acting as an exophilous vector of malaria in the sprayed zone, and in view of the high nulliparous rate observed in specimens caught in an unsprayed area it is considered that this species is unlikely to be of any importance as a vector under normal conditions. F. I. C. Apted.The following is based almost entirely on the authors' summary. In an investigation carried out in January-November 1962, mainly by means of standard all-night catches made between 5 p.m. and 8 a.m., Anopheles parensis Gillies [R.A.E., B 51 105] was found biting man in large numbers in a zone near Malindi, Kenya, in which houses were sprayed with DDT between March 1961 and October 1962. Densities were greatest just outside villages, less so on the verandah of a house and least indoors. In one open type of unsprayed house, however, moderately large numbers were caught. The monthly average catch per night by two men was greatest (over 200) outdoors in July and August. Catches in all situations were greatest during the two hours following sunset and the three hours preceding sunrise. The evening peak was highest in the outdoor catches, and the late-night peak in the indoor collections. A distinct influence of moonlight on the catches was observed, the early evening peak under certain conditions being greater during the moon's first quarter and the late-night peak during its last quarter. Moderate numbers were caught biting cattle, but as there were no large herds of stock in the neighbourhood, it is believed that most feeding was on man. The proportion of nulliparous females was 64 per cent. in the sprayed zone and 50 per cent. in an unsprayed village, and in the latter the nulliparous rate in females resembling A. funestus Giles (the majority of which would have been of that species [cf. loc. cit.]) was 24 per cent. No sporozoite infections were found in A. parensis in the sprayed zone or in a small series dissected from the unsprayed village. Thus no evidence was obtained that A. parensis was acting as an exophilous vector of malaria in the sprayed zone. Moreover, in view of the high nulliparous rate observed in the unsprayed area, this species is considered unlikely to be of any importance under normal conditions.