Samaneh Saedi; kiarash ghazvini; Masoud Youssefi; Hadi Safdar; saman soleimanpour; Parviz Afrough; Amir Azimian; hamid solgi; Masoud Keikha
Abstract
AbstractBackground: Mycobacterium tuberculosis is still one of the most dangerous human pathogens. Identification of the relationships between different clinical strains has remained a high priority for epidemiology research. Methods: In this study, we used MLSA (Multilocus sequence analysis) to generate ...
Read More
AbstractBackground: Mycobacterium tuberculosis is still one of the most dangerous human pathogens. Identification of the relationships between different clinical strains has remained a high priority for epidemiology research. Methods: In this study, we used MLSA (Multilocus sequence analysis) to generate a highly robust phylogeny of M. tuberculosis. MLSA, based on single nucleotide polymorphism (SNP) was performed on five genes fragments from the Rpsl (302 bp), MprA (559 bp), LipR (322 bp), KatG (488 bp) and Fgd1 (266 bp), in order to identify polymorphic nucleotide sites, and the discriminatory power of each locus for all genes was measured with Hunter‐Gaston Index (HGI). Results: In this study, a sequence type (ST) number was assigned to each unique allelic profile, and 9 sequence types were identified from 20 strains, these imply that there is a high diversity of strains in this area. Conclusion: Our results showed that the presence of high genetic diversity among clinical isolates of M. tuberculosis in Northeast of Iran. There is no evidence for recent transmission. Keywords: Mycobacterium tuberculosis, Multi-locus sequence analysis; Molecular epidemiology; Tuberculosis; KatG; Rpsl1. IntroductionMycobacterium tuberculosis (M. tuberculosis), the causative agents of tuberculosis (TB), is one of the most successful human pathogens, infecting nearly one-third of the people all around the world, causing over 9 million new cases and 1.7 million deaths each year [1-2]. Identification of the relationships between different clinical strains of M. tuberculosis has great significance to the public health [3].
Masoud Youssefi; Golsa Teimouri; Farnaz Zahedi Avval; kiarash ghazvini; Masoud Keikha
Abstract
The aim of this study was to determine the serum levels of ST2 protein and interleukin-33 in patients affected to tuberculosis and compare them with the control group. In the present study, at first 30 patients affected to TB were randomly selected and 52 healthy individuals, who were matched with respect ...
Read More
The aim of this study was to determine the serum levels of ST2 protein and interleukin-33 in patients affected to tuberculosis and compare them with the control group. In the present study, at first 30 patients affected to TB were randomly selected and 52 healthy individuals, who were matched with respect to their age and gender, included in the study as the control group. After that, the serum levels of sST2 and IL33 were measured by ELISA sandwich method using commercial Quantikine Human ELISA kit (R&D Systems). The data were finally analyzed by SPSS software. IL-33 levels in the TB group were higher than the healthy controls and a statistically significant difference was observed in the IL-33 levels between the two groups (P = 0.021). Moreover, IL-33R (ST2) was slightly increased in the TB patients compared to the healthy controls, although statistical analysis showed no significant difference between the two groups (P = 0.083). Regarding the high normal variation of sST2 and the limitations of the present study, it is recommended that future studies of sST2 be performed in with higher number of TB patients.
Mahbobeh Khammar; Sepideh Hassanzadeh; Fatemeh Tara; Malihe Siahsar; Fatemeh Tahmasbi; Masoud Keikha; Kiarash Ghazvini
Abstract
Introduction:In the present study, we evaluated the 4-year antimicrobial resistance trends of several nosocomial pathogens during 2018-2021 in a reffereal Mashhad hospital, Mashhad, Iran.
Methods:In this study, we reviewed the data of 70,234 clinical isolates were registred Infection Control Data of ...
Read More
Introduction:In the present study, we evaluated the 4-year antimicrobial resistance trends of several nosocomial pathogens during 2018-2021 in a reffereal Mashhad hospital, Mashhad, Iran.
Methods:In this study, we reviewed the data of 70,234 clinical isolates were registred Infection Control Data of Ghaem Hospital, Mashhad, Iran. The antimicrobial susceptibility testing was performed using Kirby-Bauer disk diffusion method according to clinical and laboratory standard institute (CLSI) instructions to evaluate trends of antimicrobial resistance over the times.
Results: There were identified (A. baumannii: n = 19,374; K. pneumonia n = 17,206; E. coli n = 23,777; S. epidermidis: n = 9,877). We did not find any significant difference in changes of antimicrobial trends over the time except in minor cases . However, The pattern of antimicrobial drug resistance was gradually differed except E. coli.
Conclusion: our results suggested the overall antimicrobial resistance trends was remins the same level during 2018-2021. It seems that in accessibility and stop prescribing of antibiotics can lead to decreasing antibiotic resistance rate.
kiarash Ghazvini; Masoud Keikha
Abstract
The odds ratio with 95%CIs was used to evaluated the synergistic effects between high salt intake and H. pylori infection among gastric cancer cases. Heterogeneity was assessed by I2 index and Cochrane Q-test; In addition, the presence of publication bias was measured using Begg’s p-value and Egger’s ...
Read More
The odds ratio with 95%CIs was used to evaluated the synergistic effects between high salt intake and H. pylori infection among gastric cancer cases. Heterogeneity was assessed by I2 index and Cochrane Q-test; In addition, the presence of publication bias was measured using Begg’s p-value and Egger’s p-value test (18). There were 7 studies met our criteria. These studies were conducted during 2003-2019 in Korea, Japan, United states, China, and Portugal. We evaluated data of 8,068 cases. H. pylori infection was confirmed by ELISA and UBT in these eligible studies (Table 1). The frequency of gastric cancer in habitual high salt intakes with positive H. pylori infection was significantly greater than those preference salty food with negative H. pylori infection (Chi-square: 5.33; p-value: 0.02). Our results suggested that there is a positive association between high salt intake and risk of gastric cancer in H. pylori infected-individuals (OR: 1.47; 95%CI: 1.01-2.15; p-value: 0.04; I2: 83.6; Q-value: 36.6; Begg’s p-value: 0.13; Egger’s p-value: 0.25) (Fig. 1).
Gastric cancer is one of the top cause of cancer-related death in the world (1). Unfortunately, gastric cancer has a poor-prognosis and untreated early gastric cancer lesions will progress to advanced gastric cancer during 4-5 years (2). Gastric cancer is a heterogeneous malignancy with multifactorial causes including socio-economic status, diet, environmental condition, genetic polymorphism as well as infectious agents particularly chronic infection by Helicobacter pylori (3). In 1994, the International Agency for Research on Cancer (IARC) announced that H. pylori is considered as class I carcinogens and etiologic cause of human gastric cancer (4). However, a high rate of H. pylori infection in areas with a low incidence of gastric cancer remains an enigma (5). It has been suggested that H. pylori infection alone cannot cause gastric cancer without synergistic effects of lifestyle, diet, etc (6-7). On the other hand, there is evidence that dietary salt has an association with gastric adenocarcinoma (8-9). Therefore, it may that H. pylori infection and high salt intakes have synergistic effects in the development of gastric cancer. the previous studies reveal that salt cause upregulation of H. pylori cagA gene during in vitro experiments (10). We performed a comprehensive literature search in several databases including PubMed, Scopus, Embase, and Google scholar using search terms consisting “Helicobacter pylori”, “Salt”, “Gastric cancer”, “Dietary” and “Salt intake” without limitation in time and language. The potential relevant documents were evaluated and the required data such as first author, publication year, country, total cases, the frequency of high salt intake among H. pylori-infected cases with gastric cancer or odds ratio corresponding 95% confidence intervals (95%CIs), and H. pylori diagnostic test were summarized in Table 1. The odds ratio with 95%CIs was used to evaluate the synergistic effects between high salt intake and H. pylori infection among gastric cancer cases. Heterogeneity was assessed by I2 index and Cochrane Q-test; In addition, the presence of publication bias was measured using Begg’s p-value and Egger’s p-value test (18). There were 7 case-control studies that met our criteria. These studies were conducted during 2003-2019 in Korea, Japan, United states, China, and Portugal. We evaluated data of 8,068 cases. H. pylori infection was confirmed by ELISA and UBT in these eligible studies (Table 1). The sodium concentration was assessed by history, urinary sodium, as well as Food frequency questionnaires (FFQs) in these studies.The frequency of gastric cancer in habitual high salt intakes with positive H. pylori infection was significantly greater than those who preference salty food with negative H. pylori infection (Chi-square: 5.33; p-value: 0.02). Our results suggested that there is a positive association between high salt intake and risk of gastric cancer in H. pylori infected-individuals (OR: 1.47; 95%CI: 1.01-2.15; p-value: 0.04; I2: 83.6; Q-value: 36.6; Begg’s p-value: 0.13; Egger’s p-value: 0.25) (Fig 1). Tsugane et al, 2004 were suggested that there is a significant relation between salt intake and the subsequent risk of gastric cancer in a Japanese population (19). In addition, Ge et al., 2012 provided a systematic review to show the association between Habitual dietary salt intake and risk of developing to gastric cancer using 11 retrospective single-center studies (20).
Atieh Yaghoubi; kiarash Ghazvini; Seyed Isaac Hashemy
Abstract
Alzheimer's disease is a type of dementia and there were 50 million individuals have dementia in 2018 worldwide and the cost of dementia care to Medicare and Medicaid is so high (about US$1 trillion) in that year. Recently, several articles show that tuberculosis may be increased the development rate ...
Read More
Alzheimer's disease is a type of dementia and there were 50 million individuals have dementia in 2018 worldwide and the cost of dementia care to Medicare and Medicaid is so high (about US$1 trillion) in that year. Recently, several articles show that tuberculosis may be increased the development rate of Alzheimer's disease in these patients. So knowing the probable relationship between these two could be helpful. Also, there is evidence demonstrating that the Bacillus Calmette–Guérin (BCG) vaccine and rifampicin as a conventional vaccine and medicine against Mycobacterium tuberculosis infections could be used as a promising agent for the prevention and reduce the development of Alzheimer’s disease and other neurodegenerative diseases. According to our knowledge, the present review is the first and only review that assessed the possible relationship between tuberculosis and Alzheimer's disease as well as the possible therapeutic role of rifampicin and BCG vaccine in treatment and prevention of Alzheimer's disease, respectively.
Mohsen karbalaei; Kiarash Ghazvini; Masoud Keikha
Abstract
Tuberculosis (TB) infection is caused by an intracellular bacterium, Mycobacterium tuberculosis (Mtb). The disease is among the most important infectious diseases, which has dedicated most cases of morbidity and mortality to itself worldwide. The global report of World Health Organization (W