Identification of the parasites that cause children's cutaneous leishmaniasis and several types of immune response cells

Cutaneous leishmaniasis has received many epidemiological, diagnostic, therapeutic, quantitative and other studies. The current study aims to determine the type of leishmaniasis parasite that causes cutaneous leishmaniasis in children in the Al-Diwaniyah governorate in central Iraq to ​​assess the level of variations in globulins and immune cells in children with cutaneous leishmaniasis. Fifty-nine was a positive sample for the traditional laboratory examination of cutaneous leishmaniasis in children whose ages ranged between (8 months-10 and years). They were collected from the Maternity and Children Hospital from January 2020 to December 2021. The samples were subjected to molecular diagnostics to determine the type of leishmaniasis that causes the disease using Real-Time PCR. ELISA was approved to measure the levels of variation in the concentrations of IgG and IgM among the group of infected and healthy children. The results indicated that children's predominant type causing cutaneous leishmaniasis is L. major 52 samples (88.13%). The immunological study showed clear and statistically significant differences in the mean globulin concentrations for comparing the patient's L. major with the control group at a probability level (P≤0.05). The current study concluded that L. major is the dominant species responsible for cutaneous leishmaniasis. Keywords: Catenous leishmaniasis, L. major, Real-Time PCR.

The Geographical Distribution of Human Cutaneous and Visceral Leishmania Species Identified by Molecular Methods in Iran: A Systematic Review With Meta-Analysis

Leishmaniasis is one of the most common vector-borne parasitic diseases in Iran. Leishmania species identification is necessary for epidemiological aspects, precise prognosis, control and treatment of the disease. We systematically searched all the studies, reports, and documentation related to species identification and geographical distribution of causative agents of cutaneous (CL), mucosal (ML), and visceral leishmaniasis (VL) using DNA-based molecular diagnostic techniques in Iran. International databases including PubMed, ScienceDirect, Embase, Google Scholar, Scopus, and Web of Science were systemically searched for English articles and Iran's databases including SID, IranMedex and Magiran were searched for Persian reports and articles. Searches were performed from 1999 to 2019 (20 years). The current review was conducted using the keywords: cutaneous leishmaniasis, visceral leishmaniasis, Leishmania species, Human, Molecular, PCR, and Iran. The study quality was evaluated using the NOS checklist. This meta-analysis procedure was accomplished using STATA, version 2.7.9. Of the 3,426 records identified in the initial search, 154 articles met inclusion criteria and qualified for the systematic review and meta-analysis. In subgroup analysis, the pooled frequency of causative agents of CL isolates was 67.3% (95% CI: 59.51–74.67%) for L. major and 32.1% (95% CI: 24.72–39.87%) for L. tropica. In addition, the pooled frequency of causative agents of VL isolates was 97.1% (95% CI: 94.6–98.8%) for L. infantum and 2.9% (95% CI: 1.12–5.37%) for L. tropica. The findings of this study showed that the main causative agents of CL and VL in Iran are L. major and L. infantum, respectively. Moreover, kinetoplast DNA (kDNA) and internal transcriber spacer (ITS) were the most used markers for identifying Leishmania species. The current study provides valuable data to encourage and direct researchers as well as public health managers in the comprehensive leishmaniasis control and prevention planning in Iran.