Quantitative assessment of contamination of soil by the eggs of Ascaris lumbricoides and Trichuris trichiura
Transactions of the Royal Society of Tropical Medicine and HygienePublished 1 July 1990
Michael S. Wong, Donald A. P. Bundy
Citations40
SJR quartileQ2
SJR score0.64
SNIP0.77
Generate an AI Snapshot to get a quick, structured summary of this paper.
Study Snapshot
ObjectiveStudy objective
MethodsResearch methodology
PopulationPopulation studied
Sample sizeSample sizes
OutcomesStudy outcomes here
ResultsStudy results comes here
LimitationsResearch study limitations comes here
A concise AI-generated summary of the paper will appear here once you click Generate AI Snapshot.
TL;DR
It is suggested that geohelminth eggs are rapidly depleted from the surface of tropical soils in the absence of continuing sources of contamination.
Abstract
This study used a method of retrieving eggs from soil to examine the spatial and temporal dynamics of soil contamination with geohelminth eggs. The level of soil contamination in two children's homes in Jamaica was determined before and after further soil contamination was prevented by chemotherapy. The home which had higher human infection levels also had a higher prevalence and density of eggs in soil. The spatial distribution of the eggs in soil was overdispersed in the home with higher levels of infection, and underdispersed in the other, perhaps due to the low density of eggs. At both localities, the proportion of soil samples containing eggs and the density of eggs in soil declined over a two-month period. The results suggest that geohelminth eggs are rapidly depleted from the surface of tropical soils in the absence of continuing sources of contamination.
Keywords
Environmental Science
Parasitism and Host Behaviour
389 Citations1990C. J. Barnard
Parasitic relationships, C.C.Thompson opportunism in parasite life cycles, R.N.Tinsley a phylogenetic perspective on the evaluation of altered host behaviours - a critical look at the manipulation hypothesis.
ParasitologyCommunity control of helminth infections of man by mass and selective chemotherapy
218 Citations1985Roy M. Anderson, Graham F. Medley
The design of mass and targetted community-based chemotherapy programmes for the control of the major helminth infections of man is discussed in relation to the population and transmission dynamics of the parasites.
Transactions of the Royal Society of Tropical Medicine and HygieneThe population dynamics and epidemiology of intestinal nematode infections
144 Citations1986Roy M. Anderson
The paper reviews recent studies on the population biology, transmission dynamics and epidemiology of intestinal nematode infections to find evidence of predisposition to heavy infection by single and multiple species of parasites and control by mass, selective and targetted chemotherapy.
Philosophical transactions of the Royal Society of London. Series B, Biological sciencesPopulation ecology of intestinal helminth infections in human communities
138 Citations1988Donald A. P. Bundy
It is suggested that further understanding of the relative importance of environmental factors and resistance to the acquisition of intense infection is dependent upon a multidisciplinary approach to epidemiological field study.
Parasitology TodayGenetic control of immunity to helminth infections
121 Citations1985D. Wakelin
Variation exists in almost every parameter that has been moni- tored, but it is important to note that, as far as the infection itself is concerned, variation is essentially quantitative, not qualitative.
Journal of ParasitologyStudies on the Rate of Development and Viability of the Eggs of Ascaris lumbricoides and Trichuris trichiura under Field Conditions
58 Citations1927H. W. Brown
It is argued that eggs of these species probably remain viable and infective in nature a corresponding length of time and this opinion has been supported further by the results of experiments by Baillet (1866) and Cram (1924) who found Ascaris and Trichuris eggs to be very resistant to freezing temperatures.
Transactions of the Royal Society of Tropical Medicine and HygienePopulation distribution of Trichuris trichiura in a community of Jamaican children
56 Citations1985Donald A. P. Bundy, D. E. Thompson +4 more
Transactions of the Royal Society of Tropical Medicine and HygieneQuantitative assessment of geophagous behaviour as a potential source of exposure to geohelminth infection
50 Citations1988Michael S. Wong, D. A. P. Bundy +1 more
A new method, based on the measurement of soil-derived silica in stools, is described, which suggests that overdispersion of exposure to soil-borne infection may contribute to the observed aggregation of geohelminth infection.
Journal of ParasitologyObservations on the Epidemiology of Ascariasis in a Region of High Hookworm Endemicity
49 Citations1952Paul C. Beaver
In regions of the United States where ascariasis is most prevalent, hookworm (Necator americanus) infections are uncommon or absent, and in regions where hookworm infection is hyperendemic, as in the lower coastal plain of the southeastern United States, the incidence of ascariases is generally low.
Journal of HelminthologyA new technique for the recovery of <i>Toxocara</i> eggs from soil
48 Citations1979B. J. O. Dada
A new flotation technique for the extraction of Toxocara eggs from soil has been devised that has a fairly high recovery efficiency and can be used for replicated quantitative experiments.
ParasitologyThe survival of parasite eggs throughout the soil profile
45 Citations1985G. W. Storey, Richard A. Phillips
Rainfall is shown to be able to wash eggs into the soil where they may be afforded protection from radiation and desiccation; this may have little epidemiological significance.
American Journal of Tropical Medicine and HygieneRandomness of Particle Distribution in Human Feces and the Resulting Influence on Helminth Egg Counting
19 Citations1965Larry K. Martin
It was inferred that helminth eggs, like beads and seeds, are randomly scattered in the stools, even if introduced into the fecal stream (above the lower colon) at irregular intervals as much as several hours apart.
Journal of HygieneThe treatment of soil infested with the human whipworm, <i>Trichuris trichiura</i>
14 Citations1976D.J. Burden, A. G. Whitehead +3 more
The soil fumigants methyl bromide, chioropicrin and Basamid or mixtures ofBasamid and chloropicrin proved to be of no use in killing T. trichiura ova in soil, but on untreated plots the eggs died at a rate such that only 20 % of the ova remained viable after 18 months.