Journals / Mikrobiyoloji Bülteni / 2008 / Cilt: 42 - Sayı: 1

Investigation of anti-Leishmania seroprevalence by differrent serologic assays in children inhabiting in the northwestern part of Turkey

Ülkemizin kuzeybatısındaki il ve ilçelerde yaşayan çocuklarda anti-Leıshmania seroprevalansının farklı serolojik yöntemlerle araştırılması

Pages
103–111
DOI
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AI Summary & Key Takeaways

AI Insight
⚡ TL;DR(Too Long; Didn't Read)

As a result, the rate of ar\t\-Leishmania seropositivity (5.2% with at least one test, and 4.2% with at least three tests) in healthy children in the study area should not be ignored, and prevention strategies should be undertaken since our previous study have also showed that the rate of VL in dogs was high and the vector Phlebotomus species were determined in these areas of Turkey.

📌 3 Key Takeaways

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Objective & Hypothesis:Human visceral leishmaniasis (VL) caused by Leishmania infantum in Mediterranean region is still an important public health problem in those countries including Turkey.
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Key Findings & Data:A total of 572 healthy children (260 girls, 312 boys) aged between 1-17 years old (mean age: 8.1 years) inhabiting in Eskisehir, Bilecik, Kütahya and Afyon provinces and their counties were included to the study with the informed consent obtained from their families.
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Conclusion & Impact:As a result, the rate of ar\t\-Leishmania seropositivity (5.2% with at least one test, and 4.2% with at least three tests) in healthy children in the study area should not be ignored, and prevention strategies should be undertaken since our previous study have also showed that the rate of VL in dogs was high and the vector Phlebotomus species were determined in these areas of Turkey.
🔬Design:Research Article
📍Scope:Comprehensive Sample
⚙️Variables:Domain Parameters

Abstract

Human visceral leishmaniasis (VL) caused by Leishmania infantum in Mediterranean region is still an important public health problem in those countries including Turkey. The asymptomatic presentation of the infection in most of the cases leads to difficulties in the diagnosis and prevention of the spread of infection. The aim of this study was to investigate the seroprevalence of anti-Leishmania antibodies in children inhabiting in the northwestern part of Turkey. A total of 572 healthy children (260 girls, 312 boys) aged between 1-17 years old (mean age: 8.1 years) inhabiting in Eskisehir, Bilecik, Kütahya and Afyon provinces and their counties were included to the study with the informed consent obtained from their families. All serum samples were screened by a commercial ELISA (Leishmania Ab Panel, Cypress Diagnostics, Belgium), two in-house ELISA (with whole antigens and rK39 antigen) tests and an in-house indirect fluorescent antibody test (IFAT). The sera yielding a positive result by commercial ELISA, have been re-evaluated with rK39 dipstick test. Of 572 children, 5.2% (n=30) were found positive with commercial ELISA, 3.8% (n=22) with IFAT, 4.7% (n=27) with in-house whole ELISA, and 3.6% (n=21) with in-house rK39 ELISA. Of 30 commercial ELISA positive sera, 19 (63.3%) gave positive result also by dipstick test. This difference was attributed to the use of multiple antigens belonging to different Leishmania species in commercial ELISA test. The number of children who were seropositive with all of the tests were 15 (2.6%) and with at least three of the tests were 24 (4.2%). Most (76.7%) of the 30 seropositive children with commercial ELISA were found to be inhabiting in Iscehisar town of Afyon province (n=16) and Sogut town of Bilecik province (n=7) where canine VL was also endemic. Our results also indicated that 93.3% (28/30) of seropositive children were living in the rural parts of the study region. Thirty seropositive children were followed-up for one year, but none of them have exhibited clinical findings of VL. As a result, the rate of ar\t\-Leishmania seropositivity (5.2% with at least one test, and 4.2% with at least three tests) in healthy children in the study area should not be ignored, and prevention strategies should be undertaken since our previous study have also showed that the rate of VL in dogs was high and the vector Phlebotomus species were determined in these areas of Turkey.

Özet

Akdeniz Bölgesi'nde Leishmania infantum'a bağlı olarak gelişen insan visseral leishmaniasis'! (VL), ciddi bir halk sağlığı problemi olarak önemini korumaktadır. Enfeksiyonun çoğu olguda asemptomatik seyretmesi, olguların tanımlanmasını ve yayılımının sınırlandırılmasını zorlaştırmaktadır. Bu çalışmada, ülkemizin kuzeybatı bölgesindeki bazı il ve ilçelerde yaşayan sağlıklı çocuklarda ar\X\-Leishmania seroprevalansının araştırılması amaçlanmıştır. Çalışmaya Eskişehir, Bilecik, Kütahya ve Afyon illeri ile bu illerin bazı ilçelerinde yaşayan 1-17 yaş arasındaki (ortalama: 8.1 yıl) sağlıklı 572 çocuk (260 kız, 312 erkek) dahil edilmiştir. Çalışmaya katılmayı kabul eden ailelerin bilgilendirilmesi ve onayı ile tüm çocuklardan alınan serum örneklerinde Leishmania antikorları; ticari ELISA (Leishmania Ab Panel, Cypress Diagnostics, Belçika), "in-house" ELISA (tüm organizma antijeni-"whole"- ve rK39 antijeni ile) ve "in-house" indirek floresan antikor testi (IFAT) ile araştırılmıştır. Ticari ELISA ile pozitiflik saptanan serumlar rK39 "dipstick" testi ile tekrar değerlendirilmiştir. Çalışma grubundaki çocukların %5.2'sinde (n=30) ticari ELISA testi ile, %3.8'inde (n=22) IFAT ile, %4.7'sinde (n=27) "in-house whole" ELISA ile ve %3.6'sında (n=21) "in-house rK39" ELISA ile seropozitiflik saptanmıştır. Ticari ELISA ile pozitif bulunan 30 örneğin 19'u (%63.3) "dipstick" testi ile pozitif sonuç vermiş, aradaki farklılığın ticari ELISA testinde çok sayıda Leishmania türüne ait antijenlerin kullanılmasına bağlı olduğu düşünülmüştür. Tüm serolojik yöntemlerle seropozitifliğin saptandığı olgu sayısı 15 (%2.6), en az üç yöntemle seropozitifliğin saptandığı olgu sayısı ise 24 (%4.2) olarak belirlenmiştir. Ticari ELISA testi ile seropozitif 30 olgunun %76.7'sinin Afyon-İscehisar (n=16) ve Bilecik-Söğüt (n=7) ilçelerinde yaşadığı belirlenmiş, %93.3'ünün (28/30) ise kırsal bölgede yaşadığı görülmüştür. Seropozitiflik saptanan çocukların hiçbirisinde bir yıllık izlem süresinde VL'e ait semptom ve klinik bulgular gözlenmemiştir. Bulgularımız çalışmanın yapıldığı bölgede sağlıklı çocuklarda saptanan seropozitifliğin (en az bir test ile %5.2, en az üç test ile %4.2) göz ardı edilemeyecek bir oranda olduğunu göstermektedir. Sonuç olarak, bu çalışmanın bulgularıyla birlikte aynı bölgelerde daha önce gerçekleştirdiğimiz bir çalışmada köpeklerde saptanan VL seropozitifliğinin yüksek olması ve vektör Phlebotomus türlerinin saptanmış olması nedeniyle parazitin yayılımının önlenmesinde gerekli koruyucu önlemlerin alınması için bölgedeki hekimlerin ve kamuoyunun bilgilendirilmesi gerektiği düşünülmüştür.

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Cite This Article

DOĞAN, N., BÖR, Ö., DİNLEYİCİ, E. Ç., TÖZ, S. Ö., ÖZBEL, Y. (2008). Investigation of anti-Leishmania seroprevalence by differrent serologic assays in children inhabiting in the northwestern part of Turkey. Mikrobiyoloji Bülteni, Cilt: 42 - Sayı: 1, 103–111. https://ajindex.com/articles/298952

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