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Effect of chlorpyrifos on healing of cutaneous leishmaniasis lesions after treatment with Pentostam(®).

Abstract：

:The insecticide chlorpyrifos (CPF) is widely used in the Kingdom of Saudi Arabia (KSA) to control agricultural pests. The present work is a preliminary investigation of the effect of CPF on healing of cutaneous leishmaniasis (CL) lesions, caused by Leishmania major in farmers exposed to this insecticide, after treatment with Pentostam(®). Lesion diameters were measured and CPF concentrations in the blood plasma of farmer and non-farmer CL patients in Al-Ahsa were detected by gas chromatography/mass spectrometry/mass spectrometry before and 6 weeks after treatment with Pentostam(®). CPF concentrations in the blood of farmer patients ranged between 4.570 and 7.096 ng/μl (mean = 6.19 ± 0.881 ng/μl) before and after treatment with Pentostam(®). The mean lesion diameter in these patients decreased by a factor of 2.21 after treatment with Pentostam(®); they measured 1.85-11.75 mm, (mean = 6.165 ± 3.500 mm) before treatment and 0.22-6.10 mm (mean = 2.796 ± 2.102 mm) after treatment. Lesion diameter increased exponentially with the increase of CPF concentration in the patients' blood. CPF was not detected in the non-farmer patients before or after treatment. Their mean lesion diameter decreased by a factor of 6.86 after treatment with Pentostam(®); they measured 1.33-7.10 mm (mean = 2.882 ± 1.764 mm) before treatment and 0.11-0.92 mm (mean = 0.425 ± 0.277 mm) after treatment. The mean lesion diameter in farmer patients was much greater than that of non-farmer patients both before (2.14×) and after (6.657×) treatment with Pentostam(®). Chronic exposure to low levels of the pesticide aggravates the development and delays the healing of CL lesions due to immunotoxicity and/or peripheral neurotoxicity caused by CPF. Further detailed studies would assess CPF effect on the severity of infection with CL in agricultural workers continuously exposed to this insecticide in different areas of KSA in conformity of their finding.

journal_name

Saudi J Biol Sci

journal_title

Saudi journal of biological sciences

authors

Al-Dawood AN,Al-Ghazal RA,Al-Jaser MH,Khalil GM

doi

10.1016/j.sjbs.2009.07.005

subject

Has Abstract

pub_date

2009-07-01 00:00:00

pages

31-6

issue

1

eissn

1319-562X

issn

2213-7106

pii

SJBS5

journal_volume

16

pub_type

杂志文章

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