1.The study determined the antimicrobial effect of colloidal copper against selected Gram-negative bacilli
Tsend-Ayush D ; Khulan T ; Anuujin G ; Dolgorsuren N ; Tserendoljin G ; Gerelmaa E ; Oyunbaatar A
Mongolian Journal of Health Sciences 2026;92(2):40-44
Background:
Copper is a mineral that is involved in many functions og the human body and copper has antibacterial reaction. However many scientists have studied the antibacterial activity of nano copper, in our country, the lack of research is the basis of our research.
Aim:
Determination of antibacterial activity of colloidal copper (CuNP)
Materials and Methods:
The study protocol was reviewed and approved by the Research Ethics Review Committee of the Mongolian National University of Medical Sciences on February 18, 2022 (Protocol No. 2022/3-02). An ionized copper solution was produced by passing an electric current (19–20 V, 3–5 A, for 24 h) through sterilized distilled water using copper plates. Ascorbic acid was then added to prepare colloidal copper. The concentration was determined using a PPM meter, and the solution was filtered through a 0.22 µm bacterial filter. The minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC) against standard bacterial strains were determined by the broth dilution method. To determine the bactericidal time, bacterial cultures were exposed to the bactericidal concentration and subcultured hourly for 10 hours. Additionally, antibacterial activity was evaluated on Mueller–Hinton agar using the disk diffusion method according to CLSI standards, where 20 µL of colloidal copper was applied onto antibiotic disks. The plates were incubated at 37°C for 24 hours, and the diameter of the inhibition zones was measured.
Result:
The concentration of the prepared colloidal copper was 0.7 ppm. Using the broth dilution method, complete bactericidal activity was observed at 0.006 ppm against Klebsiella pneumoniae, Escherichia coli, and Salmonella enteritidis, while Pseudomonas aeruginosa was completely killed at 0.008 ppm. In terms of exposure time, complete bacterial killing occurred after 2 hours for S. enteritidis and K. pneumoniae, after 6 hours for E. coli, and after 11 hours for P. aeruginosa. In addition, antibacterial activity was evaluated on Mueller–Hinton agar using the disk diffusion method according to CLSI standards. Colloidal copper increased the inhibition zone diameter of most antibiotics by 1–5 mm, particularly against P. aeruginosa. In K. pneumoniae, the activity of aztreonam and ceftriaxone was enhanced. When evaluating the inhibition zone diameter of cefotaxime against E. coli, the susceptibility result changed from intermediate to susceptible, while no significant change was observed for the other antibiotics tested. For K. pneumoniae, the addition of colloidal copper increased the inhibition zone diameter of aztreonam and ceftriaxone by approximately 1–2 mm. In P. aeruginosa, the inhibition zone diameters of most antibiotics increased by 1–5 mm; however, the activity of imipenem decreased. For S. enteritidis, most antibiotics showed an increase in susceptibility of approximately 1–2 mm, while ceftriaxone showed no observable effect.
Conclusion
1. Colloidal copper solution, at low concentrations, exhibits bactericidal activity against some Gram-negative rod-shaped bacteria.
2. Colloidal copper solution shows a synergistic effect with certain drugs, enhancing their activity; however, it exhibits an inhibitory effect on the activity of imipenem.
2.The results of a comparative study on the bacterial activity of some honey trade in Mongolia
Gerelmaa E ; Nomin B ; Otgonjargal B ; Tsend-Ayush D ; Buyankhishig T ; Enkh-Amar B ; Oyunbaatar A ; Anuujin G
Mongolian Journal of Health Sciences 2026;92(2):62-66
Background:
Numerous international studies have established that the antibacterial activity of honey is attributed to its key components, including hydrogen peroxide, methylglyoxal, peptides, polyphenolic compounds, high sugar content, and acidic pH. Despite the vast consumption of different types of honey in Mongolia, there is a lack of sufficient scientific evidence on their antibacterial properties, which served as the rationale for conducting this study.
Aim:
A study comparing the antibacterial activity of honey commonly traded in Mongolia.
Materials and Methods:
The study was conducted using an experimental research design. Eight standard pathogenic bacterial strains were utilized: Pseudomonas aeruginosa ATCC 27853, Escherichia coli ATCC 25922, Klebsiella pneumoniae ATCC 1706, Staphylococcus aureus ATCC 25923, Methicillin-resistant Staphylococcus aureus (MRSA) ATCC 700699, Staphylococcus epidermidis ATCC 35984, Salmonella enterica ATCC 13076, and Acinetobacter baumannii ATCC 19606. A total of 14 honey samples were selected for the study, comprising 11 samples sourced from the Uvs, Tuv, Sukhbaatar, Khentii, Dornod, Darkhan, Selenge, and Khuvsgul provinces of Mongolia, and 3 Manuka-type honey samples from Australia. The samples were serially diluted in broth using a 96-well U-bottom microtiter plate. One microliter of each bacterial suspension was added, and the plates were incubated at 37°C for 18–24 hours. Subsequently, the cultures were spread onto Mueller-Hinton agar and incubated under the same conditions. The minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC) were determined by evaluating bacterial growth inhibition and bactericidal activity, respectively.
Result:
Among the tested samples, the Manuka honey with MGO 570 and the honey collected from Tumentsogt soum in Sukhbaatar province exhibited the most potent antibacterial activity against MRSA, with a minimum inhibitory concentration (MIC) of 12.5% (v/v) and a minimum bactericidal concentration (MBC) of 25% (v/v). In contrast, the antibacterial activity of Manuka honey with UMF 5 and the honeys sourced from Tuv, Uvs, and Khalkhgol soum in Dornod province demonstrated MIC and MBC values of 25% (v/v) and 50% (v/v), respectively. The Manuka honey with MGO 30, as well as the honeys collected from Selenge, Darkhan, Sukhbaatar, Khentii, and Rashaant and Tarialan soums in Khuvsgul province, showed comparatively weaker activity against MRSA, Salmonella enterica, Staphylococcus epidermidis, Escherichia coli, and Staphylococcus aureus.
Conclusion
1. The antibacterial activity of natural and cultivated floral honeys was assessed by determining their minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC) against eight standard bacterial strains.
2. All seven natural floral honey samples exhibited measurable antibacterial effects against the tested strains, whereas some of the cultivated floral honey samples showed no observable activity against certain bacterial strains.
3.Antibiotic Resistance of Helicobacter pylori in Mongolia
Oyunbaatar A ; ; Gerelmaa E ; ; Narmandakh B ; Birgit Henrich ; Battogtokh Ch ; Avarzed A
Mongolian Journal of Health Sciences 2026;93(3):78-84
Background:
Helicobacter pylori is a highly prevalent pathogen infecting more than half of the global population, with considerable geographic variation in its genetic characteristics and antibiotic resistance patterns. The EPIYA motifs of the CagA protein play a critical role in bacterial virulence; however, data on the association between CagA genotypes and antibiotic resistance remain limited in Mongolia.
Aim:
To determine the antibiotic resistance, CagA EPIYA patterns, and clarithromycin resistance-associated mutations of H. pylori strains in Mongolia, and to evaluate the agreement between phenotypic and molecular diagnostic methods.
Materials and Methods:
Gastric biopsy specimens were collected from 210 patients undergoing endoscopy and cultured for H. pylori. Antibiotic susceptibility to metronidazole, clarithromycin, amoxicillin, levofloxacin, and tetracycline was determined using the E-Test method according to EUCAST guidelines. CagA EPIYA patterns were analyzed, and clarithromycin resistance-associated mutations (A2142C, A2142G, A2143G) were detected using real-time PCR.
Result:
H. pylori was successfully cultured in 86 of 210 samples (41%), and 61 isolates were included in the final analysis. CagA-positive strains accounted for 86.9%, with a predominance of Western-type CagA (52/53), while only one East Asian-type strain was identified. Among Western-type strains, the ABC (58.5%) and ABCC (37.7%) patterns were most common. The highest resistance rate was observed for metronidazole (70.5%), followed by levofloxacin (50.9%). Clarithromycin and amoxicillin resistance were both 19.7%, whereas no resistance to tetracycline was detected. Multidrug resistance (≥2 antibiotics) was observed in 45.9% of isolates, and 14.8% showed resistance to ≥3 antibiotics. Clarithromycin resistance-associated mutations were detected in 21.3% of isolates, predominantly A2143G. The agreement between E-test and real-time PCR methods was excellent (κ=0.95, p<0.001).
Conclusion
H. pylori strains in Mongolia are characterized by a predominance of Western-type CagA, with ABC and ABCC as the most common subtypes. Notably, the AAABC and AAAAB subtypes were identified for the first time. High levels of antibiotic resistance, particularly to metronidazole and levofloxacin, as well as a substantial prevalence of multidrug resistance, highlight the need for region-specific treatment strategies. In Mongolia, H. pylori demonstrated the highest resistance to metronidazole, accompanied by a high proportion of multidrug-resistant isolates.
4.Utilizing lactic acid bacteria for the cultivation of health-safe vegetables
Anuujin G ; Munkhjargal B ; Tsend-Ayush D ; Gerelmaa E ; Baigalmaa J
Mongolian Journal of Health Sciences 2025;88(4):67-70
Background:
Research on lactic acid bacteria has confirmed how specific strains possess probiotic properties and impart unique sensory characteristics to food products. The use of probiotic lactic acid bacteria in many food products, thus confers various health benefits to humans when they are frequently consumed in adequate amounts.
Aim:
To determine the effect of lactic acid bacteria on the growth of tomatoes.
Materials and Methods:
The lactic acid bacteria were cultured using the Lactobacillus medium from whipping cream
and Dandelion (Taraxacum mongolicum) and identified using the MALDI-TOF MS automated microbial identification
analyzer. A solution was prepared using Lactobacillus delbrueckii isolated from whipping cream and Lactobacillus gasseri isolated from Dandelion (10^7CFU/ml), and sterilized tomato seeds were watered for 10 days with the solution, while
sterilized distilled water was used as a control. The germination rate of the seeds and the root length were measured and
recorded every day.
Results:
The solution of L.delbrueckii bacteria isolated from cream germinated 100% of the seeds, which is 4% higher
than the control seeds, while the solution of L.gasseri bacteria isolated from Dandelion germinated 100%, supporting 4%
higher than the control seeds. Seedlings irrigated with the L.delbrueckii bacterial solution exhibited an average length of
10.3cm, which was 1.3cm longer than the control (P=0.003), indicating a statistically significant difference. Similarly,
those treated with the L.gasseri solution had an average length of 11.5cm, 2.5cm longer than the control (P=0.005), also
demonstrating statistical significance.
Conclusion
The application of the lactic acid bacterial solution significantly enhanced both the germination of tomato
seeds and the growth of the plants compared to the control solution.
5.Trends in pedestrian injuries in Mongolia: An interrupted time-series analysis
Bayanzul B ; Tumen-Ulzii B ; Galbadrakh E ; Gerelmaa G G
Mongolian Medical Sciences 2025;213(3):32-39
Introduction:
Following the COVID-19 lockdown, the introduction of powered mopeds and scooters into
urban mobility in Mongolia, without basic traffic regulatory frameworks such as vehicle
classification, participation rules, age limits for riders, or parking regulations may have
contributed to an increased risk of pedestrian injuries.
Objective:
To examine temporal trends in pedestrian injuries in Mongolia and to assess the impact
of the emergence of micro mobility, while accounting for COVID-19 lockdowns, using an
interrupted time-series analysis.
Methods:
We conducted an interrupted time-series analysis using national data on pedestrian injuries in
Mongolia from January 2016 to December 2024. Monthly pedestrian injury rates per 10,000
population were calculated and stratified by age groups, regressing it on the number of
months after January 2016 (the beginning of the study), after November 2020 (the lockdowns
started), after May 2021 (the lockdown lifted and new mode of urban transportation started
to release).
Results:
During the 9-year study period, there were 41,063 pedestrians, of whom 51.5% were
male. The monthly rate of overall pedestrian injury started to decrease after the COVID-19
lockdowns possibly due to reduced traffic activity. However, following the lifting of restrictions,
the trend started to increase among the age groups under 10 years (1.8%, 95% CI: 0.8–2.8),
10–19 years (1.6%, 95% CI: 0.3–2.9), 50–59 years (0.6%, 95% CI: 0.1–1.2), and 60–69
years (1.3%, 95% CI: 0.4–2.2).
Conclusion
The increase in pedestrian injuries suggests that the emergence of micromobility may have
contributed to higher injury risk for pedestrians in Mongolia. This highlights the urgent need
for change in infrastructure and regulations governing micromobility usage to enhance
pedestrian safety.
6.Interactions between herbs and conventional drugs
Narantungalag D ; Maralmaa T ; Oigonchimeg B ; Ser-Od B ; Tsetsegsuren E ; Gerelmaa B ; Sarnai S
Diagnosis 2024;110(3):5-13
This article provides an overview of the clinical evidence of interactions between herbal and conventional medicines. Herbs involved in drug interactions – or that have been evaluated in pharmacokinetic trials – are discussed in this review. While many of the interactions reported are of limited clinical significance and many herbal products (echinacea, valerian) seem to expose patients to minor risk
under conventional pharmacotherapy, a few herbs, notably St. John’s wort, may provoke adverse events sufficiently serious about endangering the patient’s health.
Healthcare professionals should remain vigilant for potential interactions between herbal medicines and prescribed drugs, especially when drugs with a narrow therapeutic index are used. Hypericum perforatum L. (St. John’s wort) extracts are widely used as a safe alternative to conventional antidepressant drugs for mild to moderate forms of depressive disorders.
St. John’s wort represents the herbal product that is most involved in herb-to drug interactions.
The aim of this article is to provide an overview of the clinical data regarding the E2 interactions between herbal remedies and prescribed drugs.
For patients on prescription medications, the concomitant use of herbal medications can cause serious and adverse effects. It is the responsibility of health professionals to be well informed about the clinical evidence of herb-drug interactions.
7.Comparison of umbilical cord blood gas parameters of newborns with the use of some labory induction drugs
Oigonchimeg B ; Sarnai S ; Maralmaa T ; Ser-Od B ; Tsetsegsuren E ; Gerelmaa B ; Narantungalag D
Diagnosis 2024;110(3):40-46
Background:
Induction of labor is a procedure performed to prevent maternal and perinatal morbidity and mortality. The effects of birth control pills on babies are still controversial. Therefore, we conducted this study to compare the effects of oxytocin and misoprostol on fetal blood gas parameters.
Aim:
To compare the effects of misoprostol and oxytocin used in labor induction on umbilical cord blood parameters
Materials and methods:
We conducted this study among mothers who gave birth in the NICU, according to the inclusion criteria, a control group (n=30), misoprostol alone vaginally (n=30) and oxytocin drip alone (n= 30) and oxytocin with misoprostol group (n=30) 4 groups used 100 mothers were selected respectively. Umbilical artery blood was sampled and umbilical artery blood pH, pCO2, pO2, HCO3, and VE (blood base excess) parameters were measured in the laboratory. The umbilical cord blood acid-alkaline parameters and lactate levels were analyzed and evaluated using COBAS C311 and COBAS B221 instruments. It was compared and determined using SPSS26 and EXCEL programs.
Results:
The average age of all mothers included in the study was 27.87±6.12, the average gestation period was 39.6±0.7 weeks, and the average weight of the newborn was 3466±323 gr. The average umbilical cord blood pH value was 7.34±0.04 in the control group, 7.25±0.07 in the oxytocin group, 7.27±0.04 in the misoprostol group, and 7.24±0.04 in the oxytocin and misoprostol group. And lactate valie was 5.8 in the control group, 7.5 in the oxytocin group, 9.87 in the misoprostol group, 8.7 in the combined group.
Conclusions
Compared to the group that did not use labor-inducing drugs, the mean pH of umbilical cord blood and lactate level were higher or statistically significant in the 3 groups that used labor-inducing drugs, indicating that birth-inducing drugs affect the umbilical cord blood parameters.
8.Ayurvedic medical books in the “Mongolian Tanjur”
Tudevdagva N ; Selenge E ; Gerelmaa B ; Shagdarsuren D ; Bold Sh
Mongolian Medical Sciences 2024;209(3):40-46
“Tanjur” is the greatest sutra written on thick Chinese muutuu paper with red nature
dust paint size 22,7 x 71,8 cm and has 107839 pages. It is the largest collection of ten
great and small sciences (philosophy, technology, logic, medicine, philology, astrology,
model dance, poetics, Abhidarma, and composition) created by ancient Indian and
Tibetan scientists and panditas. The Mongolian dust paint printed Tanjur had been
translated from Tibetan into Mongolian by over 200 translators under the supervision
of reincarnated Janjaa Rolbiidorj and Shireet Luvsandambiinyam between 1741 and
1742 and had been printed in Beijing between 1742 and 1749.
To print “Mongolian Tanjur” from blocks, 2160.9 ounces of silver were used. The
“Mongolian Tanjur” contains 8 Indian Ayurvedic medical books. As a result of this
research, we have briefly explained each of the 8 Ayurvedic medical books. Namely:
1. “One Hundred Medical Preparations” composed by Nagarjuna Acharya,
2. “Medical
Advice for Longevity” composed by Nagarjuna Acharya,
3. “Ritual Ava Medicine”
composed by Nagarjuna Acharya,
4. “Essence of Eight Branches” written by master
Vagbhata,
5. “An Explanation of Medical Practices called “The Essence of the Eight
Branches” written by master Vagbhata,
6. “A Commentary on the Essence of the
Eight Branches called Rays of Moonlight on the Meaning of the Words” written by the
Kashmiri Candranandana,
7. “Lexicon of Medical Terms from the Commentary on the
Essence of Eight Branches” written by the Kashmiri Candranandana and
8.“A powerful
healer to treats all diseases and promotes physical strength” written by Sivadasa.
Ayurveda is perceived as one of the most ancient and well-documented systems
of medicine, equally relevant in modern times. Its holistic approach, whether for
healthy individuals or diseased ones, remains unparalleled. Prevention of disease
and promotion of health are the main objectives of Ayurveda. Ayurveda is an ancient
medicine system of the Indian subcontinent. It is said to have originated in India
about 5000 years back. The word Ayurveda is a conjugation of two Sanskrit words,
“ayus,” meaning “life,” and “Veda,” meaning “science,” thus, it literally means the
'science of life. Unlike other medicinal systems, Ayurveda focuses more on healthy
living than the treatment of diseases.
9.Determining antibiotic susceptibility and multidrug resistance of the pathogens isolated from wound infection
Altantsetseg D ; Tserendulam B ; Nomiundari E ; Lkhagvadorj D ; Gerelmaa Ts ; Undarmaa S ; Dagvadorj Ts
Mongolian Medical Sciences 2024;210(4):3-8
Introduction:
Antimicrobial Resistance (AMR) has emerged as a significant public health and economic
issue worldwide, affecting both developed and developing countries. Our research has been
motivated by the increasing prevalence of carbapenem-resistant P. aeruginosa, A.baumannii,
and K. pneumonia in recent years.
Goal:
To determine antibiotic susceptibility of the pathogens isolated from wound infection and to
detect its multidrug resistance.
Material and Method:
Samples were collected from patients with wound infections. Pathogens were identified
by using the traditional culture methods and the API system with serotypes determined
phenotypically. Antibiotic susceptibility was assessed using the disk diffusion method and
the MIC to analyse antibiotic resistance.
Results:
In the study, among 11,221 recorded cases of wound infections in 2023, bacterial pathogens
were detected and identified at the species level in 10,339 cases (92.1%).
For identification results showed that A. baummannii were detected from 138 cases (1.3%),
216 cases (2.08%) of Ps. aeruginosa, 5 cases (0.04%) of B. cepacia, 1,383 cases (13.4%)
of Enterobacteriaceae, 205 cases (2.0%) of Enterococcus spp., 8,329 cases (80.5%) of
Staphylococcus spp., and 63 cases (0.6%) of Streptococcus spp.
Antibiotic susceptibility of these bacteria was assessed and determined multidrug
resistance. We found the followings: For A. baumannii were resistant with MDR in 68 cases
(49.3%), MRSA in 4,243 cases (51.1%), MDRSta. aureus in 1,805 cases (29.4%), VRE in
34 cases (16.5%), ESBL in 4.6%, KPC in 26 cases (11.1%), FRNF in 24 cases (11.6%), and
CRPA in 13 cases (6.3%).
Conclusion
1. Of all wound infections reported in 2023 in 92.1% there were detected pathogenic bacteria,
of which S.aureus were in 80.5% and E. coli was in 13.4%
2. 60.7% of the pathogenic bacteria detected in wound infections were multidrug-resistant,
with MRSA accounting for 51.1% and MDR A.baumannii accounting for 49.3%, indicating
high antimicrobial resistance(AMR).
10.The study of the intestinal microbiota among Mongolian Adults, it related some factors
Saruuljavkhlan B ; Battogtokh Ch ; Enkh-Amar A ; Otgonjargal B ; Otgonbileg J ; Anuujin G ; Gerelmaa E ; Bira N
Mongolian Medical Sciences 2019;188(2):3-11
Background:
The intestinal microbiota of Mongolians and its composition is of great interest of researchers, a few studies
have did in this fields. Maybe Mongolian encompass a uniquely wide range of environmental conditions, ethno
geographical cohorts and traditional nomadic lifestyles.
Goal:
We aimed to determine the amount of gut microbiota, including Lactobacillus and Bifidobacterium in the fecal
samples of relative healthy Mongolian adults residing in various regions of Mongolia by conventional culture
method and PCR.
Material and Methods:
The study was performed population based cross sectional study in healthy volunteers. In this study, 256
relative healthy Mongolian adults with no history of gastrointestinal associated diseases were enrolled
between July 2018 and April 2019. Each participants was asked to complete a questionnaire containing 164
questions about demographics, physical activity, dietary habits. Fecal samples were collected for Lactobacillus
and Bifidobacterium analysis using culture method and determination of genus of Bifidobacterium sрp and
Lactobacillus spp by PCR.
ResultsParticipants had a mean age of 38.9±12.8 years. The mean values of Lactobacillus
by culture method were 5.9±1.28 and 6.24±0.94 log10 CFU/ml (4.67х106
, 4.66х106 CFU/ml), respectively. The
abundance of Lactobacillus had a positive correlation with grams for fiber and amount of bifidobacterium ((r=
0.495, р<0.001, r=0.288, p<0.05), respectively). Significant difference were observed between groups of milk
frequency per day for amounts of lactobacillus. In adult intestinal tracts, B.Bifidum was the most common taxon
31 (29%) followed by B. angulatum 14 (13.1%), B. adolescentis 10 (9.3%), B. catenulatum group 10 (9.3%), B.
longum 9 (8.4%). B. lactis, B. breve, B. dentium and B. gallicum were subdominant species.
Conclusion:
The mean amount of Bifidobacterium and Lactobacillus of all participants were 6.24±0.94 and 5.9±1.28 log10
CFU/ml (4.66*106
, 4.67*106
CFU/ml) respectively. The Lactobacillus abundance of healthy adults was higher in
region of Khangai, East and West of Mongolian than other regions. The composition of lactobacillus altered with
ageing. Significant correlations were found between fiber, fats, potato and amount of Lactobacillus.
Keywords: Bifidobacterium, Colony forming unit, Gut microbiota, Lactobacillus
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