Document Detail

Leukocytosis and blood eosinophilia in a polyparasitised population in north-eastern Brazil.
MedLine Citation:
PMID:  16183089     Owner:  NLM     Status:  MEDLINE    
It has long been known that leukocytosis and blood eosinophilia are common in the tropical environment, but data derived from population-based studies are scarce. A study was undertaken in a fishing village in north-east Brazil where both intestinal helminthiases and parasitic skin diseases are common. Of 409 individuals studied, 128 (31.3%) were infected with one intestinal helminth or ectoparasite species, 93 (22.7%) with two, 61 (14.9%) with three, 25 (6.1%) with four and 11 (2.7%) with more than four species; no parasites were found in 91 (22.2%) individuals. Leukocyte counts ranged between 3,300 cells/microl and 16,100 cells/microl (median, 7,200 cells/microl) and eosinophil counts between 40 cells/microl and 5,460 cells/microl (median, 455 cells/microl). Eosinophilia (>500/microl) was detected in 44.7% of the individuals, and hypereosinophilia (>1,000/microl) in 12.9%. Thirty-six (8.8%) individuals showed leukocytosis. While 75% of individuals with normal eosinophil counts were considered parasite-free, only 14% with eosinophilia and 11% with hypereosinophilia did not have enteroparasites or ectoparasites. Multivariate regression showed that the probability of eosinophilia and hypereosinophilia, but not of leukocytosis, increased with the number of parasite species present. The data show that eosinophilia occurs in almost one-half of the individuals from a resource-poor setting and that it is significantly associated with the presence of intestinal helminths, but not with the presence of ectoparasites.
J Heukelbach; G Poggensee; B Winter; T Wilcke; L R S Kerr-Pontes; H Feldmeier
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2005-09-23
Journal Detail:
Title:  Transactions of the Royal Society of Tropical Medicine and Hygiene     Volume:  100     ISSN:  0035-9203     ISO Abbreviation:  Trans. R. Soc. Trop. Med. Hyg.     Publication Date:  2006 Jan 
Date Detail:
Created Date:  2005-11-18     Completed Date:  2006-03-07     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  7506129     Medline TA:  Trans R Soc Trop Med Hyg     Country:  England    
Other Details:
Languages:  eng     Pagination:  32-40     Citation Subset:  IM    
Department of Community Health, School of Medicine, Federal University of Ceará, Rua Prof. Costa Mendes 1608 - 5 andar, Fortaleza, CE 60430-140, Brazil.
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MeSH Terms
Aged, 80 and over
Child, Preschool
Developing Countries
Eosinophilia / blood,  parasitology*
Helminthiasis / blood,  complications*
Intestinal Diseases, Parasitic / blood,  complications*
Leukocyte Count
Leukocytosis / blood,  parasitology*
Middle Aged
Rural Health
Skin Diseases, Parasitic / blood,  complications*

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