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Karpisheh E, Sadjjadi SM, Nekooeian AA, Sharifi Y. Evaluation of structural changes of Echinococcus granulosus protoscoleces following exposure to different protoscolicidal solutions evaluated by differential interference contrast microscopy. J Parasit Dis 2023; 47:850-858. [PMID: 38009156 PMCID: PMC10667190 DOI: 10.1007/s12639-023-01632-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2023] [Accepted: 11/04/2023] [Indexed: 11/28/2023] Open
Abstract
The present study was aimed to assess the structural changes in protoscoleces of Echinococcus granulosus sensu stricto following exposure to different natural and chemical protoscolicidal agents using differential interference contrast (DIC)/Nomarski microscopy. Protoscoleces of sheep's liver cysts were collected aseptically. Individually, about 1000 protoscoleces were exposed to 0.5% silver nitrate, 20% hypertonic saline solution, 0.5% cetrimide solution and two different concentrations of garlic chloroformic extraction as well as phosphate-buffered saline (PBS). The protoscoleces viability was assessed using 0.1% eosin solution, and structural modifications in the protoscoleces were examined by DIC/Nomarski microscopy. The results revealed the degeneration of the tegument, disorganization of the hooks, and reduction of the size of the protoscoleces exposed to cetrimide, hypertonic sodium chloride, and silver nitrate. Furthermore, calcareous corpuscles became blurred and opaque and their numbers decreased in all the exposed samples except, those in PBS. The exposed protoscoleces to cetrimide and hypertonic sodium chloride solution showed extensive degeneration of the tegument and disorganization of the hooks. In the group exposed to 200 mg/ml chloroformic garlic extract, the protoscoleces' width decreased. The length, width, and number of calcareous corpuscles also decreased significantly in the silver nitrate-exposed protoscoleces. The study concludes that protoscoleces exposed to different solutions; cetrimide 0.5% and hypertonic sodium chloride 20% caused more pronounced structural changes in the exposed protoscoleces. These changes were well demonstrated by DIC microscopy and can be used as a supplementary tool to evaluate the effects of protoscolicidal agents. Supplementary Information The online version contains supplementary material available at 10.1007/s12639-023-01632-4.
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Affiliation(s)
- Elaheh Karpisheh
- Department of Parasitology and Mycology, School of Medicine, Shiraz University of Medical Sciences, P.O. Box 71345-1735, Shiraz, Iran
| | - Seyed Mahmoud Sadjjadi
- Department of Parasitology and Mycology, School of Medicine, Shiraz University of Medical Sciences, P.O. Box 71345-1735, Shiraz, Iran
| | - Ali Akbar Nekooeian
- Department of Pharmacology, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Yosef Sharifi
- Department of Parasitology and Mycology, School of Medicine, Shiraz University of Medical Sciences, P.O. Box 71345-1735, Shiraz, Iran
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Sharifi Y, Sadjjadi SM, Jafari SH, Nikoupour Deilami H, Mardani P, Solgi R. Application and evaluation of native antigen B from Echinococcus granulosus sensu stricto and E. canadensis alone or mixture for serodiagnosis of human G1-G3 and G6/G7 genotypes cystic echinococcosis sera, using ELISA and Western blotting. Parasitol Res 2023; 122:2227-2236. [PMID: 37438467 DOI: 10.1007/s00436-023-07924-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2022] [Accepted: 07/04/2023] [Indexed: 07/14/2023]
Abstract
Cystic echinococcosis (CE) is one of the most important helminthic diseases in the world with different genotypes distribution. The application of specific genotype antigens together with sera from patients with specific cyst genotypes have not been reported, so far. The present study aimed to apply and evaluate native AgB from Echinococcus granulosus sensu stricto (Eg) and Echinococcus canadensis (Ec) alone or mixture for serodiagnosis of human G1-G3 and G6/G7 genotypes cystic echinococcosis sera, using ELISA and Western blotting. A total of 47 human sera along with 47 human CE cysts were collected. CE genotypes were determined. Native AgB were prepared from E. granulosus s.s and E. canadensis genotypes. ELISA and Western blot were performed on human specific G1-G3 and G6/G7 genotypes sera. Species specific native AgB were used alone or mixed. The sensitivity of ELISA using alone and mixed 1Eg-1Ec, 1Eg-2Ec, and 2Eg-1Ec of native AgB from E. granulosus s.s and E. canadensis genotypes for human G1-G3 sera were 92.10, 89.47, 97.37, 100, and 100%, respectively; while using AgBs, alone and mixed for human G6/G7 sera were 100%. The sensitivity of Western blotting using native AgB of E. granulosus s.s and E. canadensis genotypes alone and mixed 2Eg-1Ec were 78.95% and 100% for human G1-G3 and G6/G7 genotypes sera, respectively. The mixture of AgB from Echinoccus granulosus sensu stricto and Echinococcus canadensis genotypes increased ELISA sensitivity for the diagnosis of human CE. Preparation and application of native AgB from specific and prevalent genotypes of CE in endemic regions is recommended.
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Affiliation(s)
- Yosef Sharifi
- Department of Parasitology and Mycology, School of Medicine Shiraz University of Medical Sciences, Shiraz, Iran
| | - Seyed Mahmoud Sadjjadi
- Department of Parasitology and Mycology, School of Medicine Shiraz University of Medical Sciences, Shiraz, Iran.
- Basic Sciences in Infectious Diseases Research Center, Shiraz University of Medical Sciences, Shiraz, Iran.
| | - Seyed Hamed Jafari
- Medical Imaging Research Center, Shiraz University of Medical Sciences, Shiraz, Iran
| | | | - Parviz Mardani
- Thoracic and Vascular Surgery Research Center, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Rahmat Solgi
- Infectious Diseases Research Center, Birjand University of Medical Sciences, Birjand, Iran
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Sadjjadi FS, Mohammadzadeh T, Jafari SH, Sharifi Y, Deilami HN, Hafezi F, Sadjjadi SM. Comparison of Native Hydatid Cyst Fluid (HCF), Lyophilized HCF, Antigen B (AgB) and Lyophilized AgB (LAgB) Originated from Echinococcus granulosus Sensu Stricto for Sero-Diagnosis of Active, Transitional and Inactive Human Liver Cystic Echinococcosis. Iran J Public Health 2023; 52:1764-1772. [PMID: 37744545 PMCID: PMC10512133 DOI: 10.18502/ijph.v52i8.13416] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/16/2022] [Accepted: 09/25/2022] [Indexed: 09/26/2023]
Abstract
Background Cystic echinococcosis (CE) is an important zoonotic parasitic disease caused by the larval stage or metacestode of the tapeworm Echinococcus granulosus sensu lato. Due to treatment protocols for different liver cysts, diagnosis of cyst stages is very important. Different antigens have been used for CE diagnosis. However, each one is more sensitive and effective for the diagnosis of specific CE stages is not known well. We aimed to compare Native Hydatid Cyst Fluid (HCF), Lyophilized Hydatid Cyst Fluid (LHCF), antigen B (AgB) and Lyophilized antigen B (LAgB) originated from E. granulosus sensu stricto (G1-G3) genotype, for sero- diagnosis of active, transitional and inactive human liver CE using ELISA technique. Methods The HCF was collected aseptically from liver CE cysts of sheep slaughtered from 2018 to 2019 in Shiraz slaughterhouse, Southern, Iran. The cysts were characterized by PCR and sequencing for genotype specification. Four types of antigens were used: HCF, LHCF, AgB and LAgB originated from E. granulosus sensu stricto (G1-G3) genotype. Thirty-three serum samples from active, transitional, and inactive human cysts were collected. Overall, 48 samples from other parasitic diseases and 60 samples from healthy subjects as negative controls were checked using four antigens by ELISA method. Results The best diagnostic sensitivity with 96.97% was observed by anti-LHCF IgG ELISA test. The best specificity with 95.37% was observed in ELISA test using LAgB. Conclusion Simultaneous test of sera with anti-LHCF IgG ELISA and anti-LAgB IgG ELISA would be the best in the diagnosis of human liver cystic echinococcosis.
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Affiliation(s)
- Fatemeh Sadat Sadjjadi
- School of Paramedical Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Tahereh Mohammadzadeh
- Applied Microbiology Research Center, Systems Biology and Poisonings Institute, Baghiyatallah University of Medical Sciences, Tehran, Iran
| | - Seyed Hamed Jafari
- Medical Imaging Research Center, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Yosef Sharifi
- Department of Surgery, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Hamed Nikoupour Deilami
- Department of Parasitology and Mycology, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Fatemeh Hafezi
- Department of Surgery, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Seyed Mahmoud Sadjjadi
- Department of Surgery, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
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Dousti M, Sadjjadi SM, Solgi R, Vafafar A, Sharifi Y, Radfar A, Hatam GR. Comparison of Isoenzyme Pattern of Echinococcus granulosus sensu stricto (G1-G3) and E. canadensis (G6/G7) Protoscoleces. Iran Biomed J 2023; 27:136-45. [PMID: 37073115 PMCID: PMC10314765 DOI: 10.52547/ibj.3815] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/08/2023] [Accepted: 04/13/2023] [Indexed: 04/20/2023]
Abstract
Background Different genotypes of Echinococcus granulosus sensu lato (s.l.) infect humans and ungulate animals, causing cystic echinococcosis. Simultaneous isoenzyme, as well as molecular characterizations of this parasite, has not yet been investigated in Iran. The present study aimed to evaluate the isoenzyme pattern of the E. granulosus sensu stricto (s.s.) and E. canadensis genotypes in Iran. Methods A total of 32 (8 humans and 24 animals) cystic echinococcosis cysts were isolated from Shiraz, Tehran, Ilam, and Birjand from May 2018 to December 2020. The DNAs were extracted and their genotypes were determined by molecular methods. Enzymes were extracted from the cysts and subjected to polyacrylamide gel electrophoresis. The activities of glucose-6-phosphate sehydrogenase (G6PD), malate dehydrogenase (MDH), malic enzyme (ME), nucleoside hydrolyse 1 (NH1), and isocitrate dehydrogenase (ICD) were examined in the cyst samples using isoenzyme method and compared it with the genotyping findings. Results DNA sequence analysis of the samples showed that the specimens contained 75% E. granulosus s.s. (G1) and 25% E. canadensis (G6) genotypes. The isoenzyme pattern of ICD in both genotypes produced a six-band pattern with different relative factors. The G6PD also produced two bands with different relative migrations in both genotypes. The MDH and NH1 systems revealed a two-band pattern, while only one band was generated in the ME enzyme in the E. granulosus s.s. genotype. In the E. canadensis, the MDH and NH1 enzymes showed one band, and the ME enzyme represented a two-band pattern. Conclusion Our findings suggest that E. granulosus s.s. and E. canadensis genotypes have entirely different isoenzyme patterns for NH1, G6PD, MDH, and ME.
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Affiliation(s)
- Majid Dousti
- Students Research Committee, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
- Department of Parasitology and Mycology, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Seyed Mahmoud Sadjjadi
- Department of Parasitology and Mycology, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Rahmat Solgi
- Department of Medical Microbiology, Birjand University of Medical Sciences, Birjand, Iran
| | - Arghavan Vafafar
- Department of Parasitology and Mycology, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Yosef Sharifi
- Department of Parasitology and Mycology, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Amirhossein Radfar
- Department of Parasitology and Mycology, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Gholam Reza Hatam
- Basic Sciences in Infectious Diseases Research Center, Shiraz University of Medical Sciences, Shiraz, Iran
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Dousti M, Sadjjadi SM, Solgi R, Vafafar A, Sharifi Y, Radfar A, Hatam GR. Comparison of Isoenzyme Pattern of Echinococcus granulosus sensu stricto (G1-G3) and E. canadensis (G6/G7) Protoscoleces. Iran Biomed J 2023; 27:136-45. [PMID: 37073115 PMCID: PMC10314765 DOI: 10.61186/ibj.3815] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/08/2023] [Accepted: 04/13/2023] [Indexed: 12/17/2023]
Abstract
Background Different genotypes of Echinococcus granulosus sensu lato (s.l.) infect humans and ungulate animals, causing cystic echinococcosis. Simultaneous isoenzyme, as well as molecular characterizations of this parasite, has not yet been investigated in Iran. The present study aimed to evaluate the isoenzyme pattern of the E. granulosus sensu stricto (s.s.) and E. canadensis genotypes in Iran. Methods A total of 32 (8 humans and 24 animals) cystic echinococcosis cysts were isolated from Shiraz, Tehran, Ilam, and Birjand from May 2018 to December 2020. The DNAs were extracted and their genotypes were determined by molecular methods. Enzymes were extracted from the cysts and subjected to polyacrylamide gel electrophoresis. The activities of glucose-6-phosphate sehydrogenase (G6PD), malate dehydrogenase (MDH), malic enzyme (ME), nucleoside hydrolyse 1 (NH1), and isocitrate dehydrogenase (ICD) were examined in the cyst samples using isoenzyme method and compared it with the genotyping findings. Results DNA sequence analysis of the samples showed that the specimens contained 75% E. granulosus s.s. (G1) and 25% E. canadensis (G6) genotypes. The isoenzyme pattern of ICD in both genotypes produced a six-band pattern with different relative factors. The G6PD also produced two bands with different relative migrations in both genotypes. The MDH and NH1 systems revealed a two-band pattern, while only one band was generated in the ME enzyme in the E. granulosus s.s. genotype. In the E. canadensis, the MDH and NH1 enzymes showed one band, and the ME enzyme represented a two-band pattern. Conclusion Our findings suggest that E. granulosus s.s. and E. canadensis genotypes have entirely different isoenzyme patterns for NH1, G6PD, MDH, and ME.
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Affiliation(s)
- Majid Dousti
- Students Research Committee, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
- Department of Parasitology and Mycology, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Seyed Mahmoud Sadjjadi
- Department of Parasitology and Mycology, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Rahmat Solgi
- Department of Medical Microbiology, Birjand University of Medical Sciences, Birjand, Iran
| | - Arghavan Vafafar
- Department of Parasitology and Mycology, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Yosef Sharifi
- Department of Parasitology and Mycology, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Amirhossein Radfar
- Department of Parasitology and Mycology, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Gholam Reza Hatam
- Basic Sciences in Infectious Diseases Research Center, Shiraz University of Medical Sciences, Shiraz, Iran
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Sharifi Y, Abbasi F, Shahabi S, Zaraei A, Mikaeili F, Sarkari B. Comparative genotyping of Blastocystis infecting cattle and human in the south of Iran. Comp Immunol Microbiol Infect Dis 2020; 72:101529. [PMID: 32795717 DOI: 10.1016/j.cimid.2020.101529] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2020] [Revised: 07/22/2020] [Accepted: 08/04/2020] [Indexed: 12/20/2022]
Abstract
BACKGROUND Blastocystis is a unicellular protozoan and one of the most common parasites found in humans and many animals' intestinal tract. The present study aimed to compare the genotypes of Blastocystis infecting cattle and humans in the south of Iran. METHODS A total of 100 human stool samples and 75 cattle stool samples were microscopically examined for Blastocystis infection. DNA was extracted from thirty-eight microscopically positive samples (13 humans and 25 cattle). PCR was performed on positive samples targeting the Blastocystis-specific SSU rDNA gene. PCR products of eight humans and eleven cattle samples were sequenced and compared with available reference sequences in GenBank by BLAST queries. Genetic diversity was measured for Blastocystis subtypes in human and cattle, based on haplotype and nucleotide diversities. RESULTS The PCR detected Blastocystis in ten humans and twenty-four cattle samples. Blastocystis subtypes 1, 2, and 6 were found in humans whereas subtypes 5 and 10 were found in cattle. Subtype (ST) 2 was the most predominant subtypes in humans whereas, in cattle specimens, the ST5 was the most dominant subtype. Based on the Blastocystis sequences of SSU rDNA, 68 sites were polymorphic and 49 sites were parsimony informative, resulting in the identification of 15 haplotypes, 10 haplotypes in the cattle and 5 in humans. No haplotype was shared between cattle and human parasites. CONCLUSION Human-derived Blastocystis subtypes were different from cattle subtypes in southern Iran. Nevertheless, subtype 5 in cattle can be a risk factor for human infection.
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Affiliation(s)
- Yosef Sharifi
- Department of Parasitology and Mycology, School of Medicine Shiraz University of Medical Sciences, Shiraz, Iran
| | - Ferdos Abbasi
- Department of Parasitology and Mycology, School of Medicine Shiraz University of Medical Sciences, Shiraz, Iran
| | - Saeed Shahabi
- Department of Parasitology and Mycology, School of Medicine Shiraz University of Medical Sciences, Shiraz, Iran
| | - Afshin Zaraei
- Department of Parasitology and Mycology, School of Medicine Shiraz University of Medical Sciences, Shiraz, Iran
| | - Fattaneh Mikaeili
- Department of Parasitology and Mycology, School of Medicine Shiraz University of Medical Sciences, Shiraz, Iran
| | - Bahador Sarkari
- Department of Parasitology and Mycology, School of Medicine Shiraz University of Medical Sciences, Shiraz, Iran; Basic Sciences in Infectious Diseases Research Center, Shiraz University of Medical Sciences, Shiraz, Iran.
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Somi MH, Rahmati-Yamchi M, Sharifi Y, Kafshdooz T, Milani M. Evaluation of frxA and rdxA gene mutations in clinical metronidazole resistance Helicobacter pylori isolates. Trop Biomed 2017; 34:346-351. [PMID: 33593015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Metronidazole resistance is an important factor related to failure in the treatment of Helicobacter pylori. The mutation in the rdxA and frxA genes is the most important cause of resistance to metronidazole. Since the resistance rate of metronidazole is high in our region, we decided to assess the frequency of these mutations among H. pylori clinical isolates. Antral gastric biopsy specimens were cultured and minimal inhibitory concentrations (MICs) of metronidazole were determined by the E-test method. The rdxA and frxA genes were amplified in all isolates through the use of PCR with the specific primers. PCR products were purified for sequencing. The resultant sequences were compared with the wild type reference sequences to find any possible mutations. According to our findings, the rate of metronidazole resistance was 77%, with the MICs ranging from 0.25-1 µg/ml for metronidazolesensitive group and from 16-256 µg/ml for resistance group. H. pylori isolates containing a single mutation in rdxA or frxA genes demonstrated a low MIC (8-16 µg/ml), while those containing mutations in both genes showed a higher MIC (32-256 µg/ml). In this study, all resistant H. pylori isolates contained single or multiple nucleotide substitutions in the mentioned genes. Nevertheless, no nucleotide substitutions were found in the sensitive clinical isolates. The results of our study showed that the mutations in rdxA are mostly related to metronidazole resistance, and mutations in frxA are able to enhance H. pylori resistance.
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Affiliation(s)
- M H Somi
- Liver and Gastrointestinal Disease Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - M Rahmati-Yamchi
- Department of Biochemestry, School of Medicine, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Y Sharifi
- Department of Microbiology, School of Medicine, Urmia University of Medical Sciences, Urmia, Iran
| | - T Kafshdooz
- Department of Medical Nanotechnology, School of Advanced Medical Sciences,Tabriz University of Medical Sciences, Tabriz, Iran
| | - M Milani
- Liver and Gastrointestinal Disease Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
- Department of Medical Nanotechnology, School of Advanced Medical Sciences,Tabriz University of Medical Sciences, Tabriz, Iran
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Hasani A, Sharifi Y, Ghotaslou R, Naghili B, Hasani A, Aghazadeh M, Milani M, Bazmani A. Molecular screening of virulence genes in high-level gentamicin-resistant Enterococcus faecalis and Enterococcus faecium isolated from clinical specimens in Northwest Iran. Indian J Med Microbiol 2012; 30:175-81. [PMID: 22664433 DOI: 10.4103/0255-0857.96687] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
PURPOSE The present study screened clinical isolates of Enterococcus faecalis and Enterococcus faecium to determine the prevalence of high-level gentamicin-resistant enterococci and the potential virulence genes among them. MATERIALS AND METHODS Clinical enterococcal isolates were obtained from three university teaching hospitals in Northwest Iran. Isolated enterococci were identified phenotypically followed by antibiotic susceptibility testing. Multiplex PCR was performed for the detection of genus, species-specific targets, gentamicin resistance, and potential virulence genes. RESULTS Of 220 enterococcal isolates, 133 (60.45%) isolates were identified as high-level gentamicin-resistant. Of these isolates, 79 (59.4%) and 54 (40.6%) were E. faecalis and E. faecium, respectively. All high-level gentamicin-resistant strains carried aac(6')Ie-aph(2″)Ia. Of 220 isolates, 65.9% were positive for gelE, and 55%, 53.6%, 51.8%, and 49.5% of isolates were positive for cpd, asa1, ace, and esp, respectively. Phenotypically detected β-haemolytic strains (19.54%) were found to possess cylL ls MAB. CONCLUSION The study revealed that high-level gentamicin-resistance was related to the presence of aac(6')Ie-aph(2″)Ia. Isolated enterococci harboured potential virulence determinants, which were more common among E. faecalis than among E. faecium strains.
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Affiliation(s)
- A Hasani
- Research Center of Infectious Diseases and Tropical Medicine, Faculty of Medicine Department of Clinical Microbiology, Tabriz University of Medical Sciences, Tabriz, Iran
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Yousefi S, Nahaei MR, Farajnia S, Ghojazadeh M, Akhi MT, Sharifi Y, Milani M, Ghotaslou R. Class 1 integron and Imipenem Resistance in Clinical Isolates of Pseudomonas aeruginosa: Prevalence and Antibiotic Susceptibility. Iran J Microbiol 2010; 2:115-21. [PMID: 22347559 PMCID: PMC3279778] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
BACKGROUND AND OBJECTIVES Pseudomonas aeruginosa is one of the most important causative agents of nosocomial infections especially in ICU and burn units. P. aeruginosa infections are normally difficult to eradicate due to acquired resistance to many antibiotics. Recent appearance of carbapenem resistant P. aeruginosa isolates is considered a major healthcare problem. The present study was conducted to detect class 1 integron and antibiotic susceptibility profiles of imipenem-sensitive and resistant clinical isolates of P. aeruginosa. MATERIALS AND METHODS Antibiotic susceptibility profiles and minimum inhibitory concentration against imipenem was studied in 160 clinical isolates of P. aeruginosa by disk agar diffusion method and Etest, respectively. Detection of class 1 integron was performed by the PCR method. Demographic and microbiological data were compared between imipenem susceptible and non-susceptible isolates by the SPSS software. RESULTS PCR results showed that 90 (56.3%) of P. aeruginosa isolates carried class 1 integron. Antibiotic susceptibility results revealed that 93 (58.1%) were susceptible and 67 (41.9%) were non-susceptible to imipenem. Comparison of antibiotic susceptibility patterns showed high level of drug resistance among imipenem non-susceptible isolates. We found that MDR phenotype, presence of class 1 integron and hospitalization in ICU and burn units were significantly associated with imipenem non-susceptible isolates. CONCLUSION The high frequency of imipenem resistance was seen among our P. aeruginosa isolates. Since carbapenems are considered as the last drugs used for treatment of P. aeruginosa infections, it is crucial to screen imipenem non-susceptible isolates in infection control and optimal therapy.
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Affiliation(s)
- S Yousefi
- Drug Applied Research Center, Tabriz University of Medical Sciences, Tabriz, Iran,Microbiology Department, Faculty of Medicine, Tabriz University of Medical Sciences, Tabriz, Iran,Clinical microbiology laboratory of Imam Hospital, Orumieh University of Medical Sciences
| | - MR Nahaei
- Drug Applied Research Center, Tabriz University of Medical Sciences, Tabriz, Iran,Microbiology Department, Faculty of Medicine, Tabriz University of Medical Sciences, Tabriz, Iran,Corresponding author: Mohammad Reza Nahaei Ph.D Address: Department of Medical Microbiology and Drug Applied Research Center, Faculty of Medicine, Tabriz University of Medical Sciences, Tabriz, Iran. Tel: +98-4113364661. Fax: +98-4113364661. E-mail:
| | - S Farajnia
- Biotechnology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - M Ghojazadeh
- Physiology Department, Faculty of Medicine, Tabriz University of Medical Sciences, Tabriz, Iran
| | - MT Akhi
- Drug Applied Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Y Sharifi
- Clinical microbiology laboratory of Imam Hospital, Orumieh University of Medical Sciences
| | - M Milani
- Drug Applied Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - R Ghotaslou
- Drug Applied Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
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Cruysberg JRM, Sharifi Y. [Congenital pain-insensitivity syndrome; a rare indication of the benefit of pain]. Ned Tijdschr Geneeskd 2007; 151:1903-4; author reply 1904. [PMID: 17902566] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/17/2023]
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Sharifi Y, Cruysberg JRM. [Diagnostic image (284). A man with Horner's syndrome, ipsilateral headache and dysphasia]. Ned Tijdschr Geneeskd 2006; 150:2171; author reply 2171. [PMID: 17061372] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
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Watson RWG, Redmond HP, McCarthy J, Burke P, Bouchier-Hayes D, Kelly C, Watson RGK, Duggan S, Ahmad M, Croke DT, El-Magbri AA, Stevens FM, McCarthy CF, O’Connor H, Kanduru C, Cunnane K, Marshall DG, Chua A, Keeling PWN, Sullivan DJ, Coleman D, Smyth CJ, Caldwell MTP, Marks P, Byrne PJ, Walsh TN, Hennessy TPJ, Reid IM, Hickey K, Deb B, O’Callaghan P, Lawlor P, Crean P, Grehan D, Sweeney EC, Kelly CJ, Rajpal P, Couse NF, Khan F, Delaney PV, Lynch S, Kelleher D, McManus R, O’Farrelly C, Pule MA, Lynch S, Madrigal L, Hegarty J, Traynor O, McEntee G, Sheahan K, Carey E, Stack WA, Mulcahy H, O’Donoghue DP, Goggins M, Mahmud N, Weir DG, Keely SJ, Baird AW, Farrell RJ, Khan MI, Cherukuri AK, Noonan N, Boyle TJ, Roddie ME, Williamson RCN, Habib NA, Sharifi Y, Courtney MG, Fielding JF, Abuzakouk M, Feighery C, Jones E, O’Briain S, Casey E, Prabhakar MC, MacMathuna P, Lennon J, Crowe J, Merriman R, Ryan E, Kitching A, Mulligan E, Kelly P, Gorey TF, Lennon JR, McGrath JP, Timon C, Gormally SM, Baker A, MacMahon P, Tangney N, Mowet A, Drumm B, Kierce B, Daly L, Bourke B, Carroll R, Durnin M, Prakash N, Clyne M, Cahill RJ, Kilgallen C, Beattie S, Hamilton H, O’Morain CA, Xia HX, English L, Keane CT, Fenton J, Hone S, Gormley P, O’Dwyer T, McShane D, Leonard N, Hourihane D, Whelan A, Maguire D, O’Sullivan GC, Harvey B, Farrell R, Maloney M, O’Byrne K, Carey C, Meagher PJ, Deasy JM, Barrett J, Collins JK, O’Sullivan GC. Irish society of gastroenterology. Ir J Med Sci 1993. [DOI: 10.1007/bf03022586] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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