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Antibacterial Effect of Carboxymethyl Cellulose Coating Enriched by Zataria Multiflora Essential Oil and Grape Seed Extract
M Raeisi, H Tajik, J Aliakbarlu,
Volume 6, Issue 2 (Autumn- Winter [PERSIAN] 2012)
Abstract
Abstract Background and objectives: The presence of pathogenic bacteria and the factors causing food spoilage are the great challenge for public health. Attention to natural additives instead of chemical preservatives resulted in conducting several studies on plant essential oil and extracts. We aimed at evaluating the antibacterial effect of carboxymethyl cellulose coating enriched by Zataria multiflora essential oil and grape seed extract on rainbow trout meat. Material and methods: In this study, two concentrations of Zataria multiflora essential oil (1% and 2%) and two concentrations of grape seed extract (0.5% and 1%) were used both alone and in combination with Carboxymethyl cellulose coating. Antibacterial effect of these treatments was evaluated by enumeration of bacteria in special culture media. Results: The results obtained in this study demonstrate that Zataria multiflora essential oil in combination with grape seed extract significantly can decrease the number of bacteria and delay the spoilage of the samples (p<0.05). Conclusion: Coating enriched by Zataria multiflora and grape seed extract can properly delay the growth of spoilage microorganisms and prolong the shelf life of meat products. Key words: Carboxymethyl cellulose coating, Zataria multiflora essential oil, Grape seed extract, Microbial flora
Inhibitory Potential of Metabolites from Lactobacillus casei against Phenotypic Characteristics of Salmonella typhimurium LT2
Hossein Naghili, Hossein Tajik, Mojtaba Raeisi, Hadi Ghasem Mahdi , Mehran Moradi, Majid Amin Zare, Touraj Mehdizadeh, Hasan Hasanzadazar , Fardin Hariri,
Volume 10, Issue 6 (Nov-Dec-2016 2016)
Abstract

ABSTRACT

          Background and Objective: Several studies have

shown the antimicrobial activity of lactobacilli against Salmonella enterica (serotype typhimurium). The aim of this study was to evaluate the inhibitory potential of metabolites produced by probiotic culture of Lactobacillus casei against S. typhimurium and its impact on S. typhimurium motility and biofilm formation.

         Methods: In order to evaluate the impact of the metabolites, L. casei cell-free culture supernatant (CFCS) was collected by centrifugation of L. casei secondary cultures. Effectiveness of the CFCS against Salmonella was evaluated by the well-diffusion method. In addition, in vitro effect of this treatment on motility in Swarm agar and biofilm formation by the bacteria was investigated.

         Results: Inhibition zone diameters of S. typhimurium were 0.83 and 12.1 mm at concentrations of 50 and 100 μl of Lactobacillus CFCS against the log4 of S. typhimurium, respectively. Moreover, CFCS treatment inhibited the motility and biofilm formation by Salmonella. Concentrations of 5% and 10% were determined as the minimum inhibitory concentrations for motility and biofilm formation by S. typhimurium. Furthermore, effectiveness of the CFCS against Salmonella was dose-dependent (P<0.05).

         Conclusion: L. casei CFCS is able to inhibit the growth, motility and biofilm formation in S. typhimurium.

         Keywords: Anti-Bacterial, Lactobacillus Casei Metabolites, Phenotypic Characteristics of S. typhimurium


Bronchopulmonary lophomoniasis in a Prisoner: A Case Report
Sadeghali Azimi, Bahareh Bashardoust, Mohammad Hadi Tajik Jalayeri,
Volume 19, Issue 2 (3-2025)
Abstract
Introduction: Bronchopulmonary lophomoniasis is an infrequent occurrence. In this study, we document a singular instance of pulmonary lophomoniasis exhibiting unconventional manifestations in Golestan province, Iran.
Case presentation: The case under examination pertains to a 47-year-old male inmate who has been encountering respiratory issues for a duration of four months, culminating in a diagnosis of lophomoniasis. Both blood and sputum cultures yielded negative results. Similarly, bronchoalveolar lavage tests for bacterial and fungal pathogens returned negative findings. However, bronchoalveolar lavage (BAL) results (microscopic) showed mild positive lophomoniasis targeting Lophomonas blattarum and Serum IgE=387 was relatively higher than normal limits.
Conclusion: The patient received treatment with metronidazole, leading to the resolution of all clinical complications within a span of four weeks.
 
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