Sample sizes for identifying the key types of container occupied by dengue-vector pupae: the use of entropy in analyses of compositional data

Alexander, N., Lenhart, Audrey, Romero-Vivas, C. M. E., Barbazan, P., Morrison, A. C., Barrera, R., Arredondo-Jimenez, J. I. and Focks, D. A. (2006) 'Sample sizes for identifying the key types of container occupied by dengue-vector pupae: the use of entropy in analyses of compositional data'. Annals of Tropical Medicine and Parasitology, Vol 100, S5-S16.

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Abstract

A method has been developed for estimating the sample sizes needed to identify categories that comprise a large proportion of a compositional data-set. The method is to be used in the design of surveys of mosquito pupae, for identifying the key container types from which the majority of adult dengue vectors emerge. Although a finite-population correction was devised for estimating the mean of a negative binomial distribution, other complications of parametric approaches make them unlikely to yield methods simple enough to be practically applicable. The Shannon-Wiener index was therefore investigated as a more useful alternative, at the cost of theoretical generalizability, in an approach based on resampling methods in conjunction with the use of entropy. This index can be used to summarize the degree to which pupae are either concentrated in a few container types, or dispersed among many. An empirical relationship between the index and the repeatability of surveys of differing sample sizes was observed. A step-wise rule, based on the entropy of the cumulative data, was devised for determining the sample size, in terms of the number of houses positive for pupae, at which a pupal survey might reasonably be stopped.

Item Type:	Article
Additional Information:	Suppl. 1
Uncontrolled Keywords:	diptera culicidae
Subjects:	QX Parasitology > Insects. Other Parasites > QX 505 Diptera QX Parasitology > Insects. Other Parasites > QX 650 Insect vectors WC Communicable Diseases > Virus Diseases > Infectious Mononucleosis. Arbovirus Infections > WC 528 Dengue
Faculty: Department:	Groups (2002 - 2012) > Vector Group
Digital Object Identifer (DOI):	https://doi.org/10.1179/136485906X105471
Depositing User:	Sarah Lewis-Newton
Date Deposited:	11 Feb 2011 11:39
Last Modified:	17 Jul 2020 10:58
URI:	https://archive.lstmed.ac.uk/id/eprint/1437

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