The purpose of the study. To study the seroprevalence of Giardia lamblia among the pediatric population in the Astrakhan region in 2019–2022, associated with certain determinants such as age, regional prevalence, the presence or absence of clinical manifestations and risk factors, and analyze the effectiveness and adequacy of diagnostic and therapeutic procedures.

Materials and methods. Over 2019–2022, six thousand eight hundred fifty episodes of parasitic infections were registered in the Astrakhan region, of which 95.1%, or 6,523 cases, accounted for children. Giardiasis accounted for 19.6% (1,240 cases) of all parasitic infections, while children accounted for 82.8% (1,109 cases).

The results of the study. In the Astrakhan region, giardiasis is characterized by the same prevalence in urban and rural areas.

In the majority of cases, patients complained of various clinical symptoms and signs characteristic of this disease (87.2 (967 cases)), on the basis of which giardiasis was suspected and further examination of the child was carried out.

When collecting the epidanamnesis, it was found that 90.4% of children (1002 cases) said that they did not follow personal hygiene well. In addition, onychophagia (48.6% (539 cases)), geophagia (37.9% (420 cases)), and close contact with animals (including pets) was detected in more than half of all cases — 76.8% or 852 cases.

Research limitations. The limiting factors in the study are the epidemiological maps of children infected with lamblia.

Conclusions. During the study period, giardiasis was more often found among school-age children in the Astrakhan region. The clinical picture was most often dominated by pain in the epigastric region, complaints of decreased appetite and diarrhea. In all cases, giardiasis was diagnosed based on laboratory confirmation of the presence of cysts.

Compliance with ethical standards. The conducted study does not require the submission of the conclusion of the committee on biomedical ethics or other documents, since during the preparation of the work, epidemiological records of persons with giardia were used, as well as extracts from outpatient admission cards of children’s polyclinics.

Contribution of the authors: Kravchenko D.A. — collection and processing of material; Tarasova A.V. — statistical data processing; Arakelyan R.S. — collection and processing of material; writing text, statistical data processing, editing; concept and design of research, writing text, compiling a list of references; Maslyaninova A.E. — statistical data processing; Kasatkin D.N. — approval of the final version of the article; Beshtaov D.H. — statistical data processing; Artsueva H.B. — statistical data processing; Akhmarov N.V. — statistical data processing; Akhmedpashaev G.T. — statistical data processing. All co–authors are responsible for the integrity of all parts of the article.

Acknowledgment. The study had no sponsorship.

Conflict of interest. The authors declare no conflict of interest.

Received: June 16, 2023 / Accepted: October 18, 2023 / Published: February 28, 2025