ISSN 2736-1756
Research Article
Advanced Journal of Microbiology Research ISSN 2241-9837 Vol. 13 (2), pp. 001-010, February, 2019. © International Scholars Journals
Full Length Research Paper
Surface display of multi-epitopes synthetic gene of Mycobacterium tuberculosis on Salmonella typhi Ty21a using a pgsA anchor protein
Badrul S. M. Zainuddin1*, Mustaffa Musa2 and Zainul F. Zainuddin3
1Institute for Research in Molecular Medicine (INFORMM), Universiti Sains Malaysia, 16150 Kubang Kerian, Kelantan, Malaysia.
2School of Medical Sciences, Universiti Sains Malaysia, 16150 Kubang Kerian Kelantan, Malaysia.
3School of Health Sciences, Universiti Sains Malaysia, 16150 Kubang Kerian, Kelantan, Malaysia.
Accepted 08 January, 2019
Abstract
We have developed a recombinant Salmonella typhi Ty21a vaccine candidate (rSTvacIII) displaying a multi-epitopes mycobacterial antigen called the VacIII (containing ubiquitin and 4 immunogenic mycobacterial epitopes of ESAT-6, PhoS1, Hsp 16.3 and MTB 8.4 genes) on the surface of S. typhi Ty21a (Ty21a) using PgsA protein as a carrier. The expression of VacIII protein on the surface of Ty21a was verified by western blot. Immunization in BALB/c mice with rSTvacIII induced strong Th1-type responses based on high level of in vitro IFN- but low IL-4 secretion. Since the protective immunity against tuberculosis is mediated by Th1-type response, the rSTvacIII have potential as effective vaccine candidate against tuberculosis.
Key words: VacIII antigen, PgsA anchoring motif, tuberculosis, Salmonella typhi Ty21a.
Mustaffa Musa and Zainul F. Zainuddin, Badrul S. M. Zainuddin*
Page: 1 - 10
Research Article
Advanced Journal of Microbiology Research ISSN 2241-9837 Vol. 13 (2), pp. 001-008, February, 2019. © International Scholars Journals
Full Length Research Paper
Virucidal activity of green propolis against avipoxvirus in chorioallantoic membrane of embryonated chicken eggs
Camila O. Vilela1, Geferson Fischer1*, Clarissa C. de Castro1, Cristina F. Nunes1, Silvia O. Hübner1, Margarida B. Raffi2, Simone E. Salles2, Marcos A. Anciuti3 and Gilberto D. Vargas1
1Laboratório de Virologia e Imunologia, Faculdade de Veterinária, Universidade Federal de Pelotas – UFPel – CP 354 –96010-900 – Pelotas – RS – Brasil.
2Departamento de Patologia Animal, Faculdade de Veterinária, Universidade Federal de Pelotas – UFPel – CP 354 –96010-900 – Pelotas – RS – Brasil.
3Conjunto Agrotécnico Visconde da Graça, Universidade Federal de Pelotas – UFPel – CP 354 – 96010-900 – Pelotas– RS – Brasil.
Accepted 07 January, 2019
Abstract
Recent pandemics caused by virus like influenzavirus (H1N1, H5N1) reaffirm the importance of studies aiming at obtaining new virucidal and/or antiviral substances, once its prolonged use can lead to resistance to the active principles. Green propolis, which has several scientifically proven bioactive properties, was evaluated in this study as an ethanol extract regarding its virucidal capacity against avipoxvirus (APV) inoculated in chorioallantoic membrane of chicken embryos (CAM). Eggs inoculated with virus and 2400 µg/dose of propolis, previously incubated for four hours, presented reduction in the pox lesions number (p<0.05) in relation to the positive control, besides reduction in the number of intracytoplasmatic inclusion bodies and in the vacuolar degeneration score of epithelial cells from mesoderm CAM. After eight hours of incubation with the virus, the same concentration of propolis completely inactivated APV (p<0.0001) and in concentrations ten times lower (240 g/dose) significantly reduced the pox lesion numbers and the histopathology findings (p<0.05) . This product from bees presented virucidal activity depending on the dose and the incubation time with the virus before the inoculation. Although further research is needed, the activity of green propolis against APV can represent a new approach to virucidal or antiviral drugs development.
Key words: Green propolis, virucidal activity, avipoxvirus, chorioallantoic membrane.
Clarissa C. de Castro, Margarida B. Raffi, Simone E. Salles, Silvia O. Hübner, Camila O. Vilela, Marcos A. Anciuti and Gilberto D. Vargas, Cristina F. Nunes, Geferson Fischer*
Page: 1 - 8
Research Article
Advanced Journal of Microbiology Research ISSN 2241-9837 Vol. 13 (2), pp. 001-005, February, 2019. © International Scholars Journals
Full Length Research Paper
Emergence of extensive drug-resistant Acinetobacter baumannii in North of Jordan
Ghulam N. Dhabaan1, Hamimah H1 and M. A. Shorman2*
1Department of Medical Microbiology, Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia.
2King Fahad Specialist Hospital, Dammam, Saudia Arabia.
Accepted 10 January, 2019
Abstract
The aim of this study is to investigate the antimicrobial susceptibility profile of Acinetobacter baumannii and the contribution of the insertion sequence upstream of ampC -lactamase on the susceptibility profile of 64 A. baumannii clinical isolates collected from a Jordan hospital. A total of 64 consecutive clinical isolates of A. baumannii were recovered (between March 2005 and December 2006) at the King Abdullah University Hospital (KAUH). The antimicrobial susceptibility profile against 11 different antibiotics was determined by disk diffusion method. The minimum inhibitory concentration (MIC) of these antibiotics against all isolates was determined using Etest. Polymerase chain reaction (PCR) screening was carried out to identify the presence of ampC gene and its adjacent insertion sequence. A. baumannii showed high resistance profile to -lactam antibiotics (cefotaxime 92.2%, cefuroxime 98.4%, ceftazidime 89.1%) and ciprofloxacin 89.1%. imipenem and meropenem showed increased resistant rates (70.1 and 71.6%, respectively) with nearly half of the isolates being resistant to amikacin (52.5%). All isolates were susceptible to colistin. AmpC gene was detected in all isolates and only -lactam including carbapenems and -lactamase inhibitor resistant isolates were found to carry the IS-AmpC gene. Our present study confirms the essential role of the insertion sequence which could represent a gene regulatory system, able to regulate various genes in A. baumannii. Finally, inappropriate infection control measures and inaccurate antibiotic usage are highly potential factors that might increase the prevalence and spread of antibiotic resistant A. baumannii isolates.
Key words: Acinetobacter baumannii, Antimicrobial susceptibility, IS-AmpC
Ghulam N. Dhabaan, Hamimah H and M. A. Shorman*
Page: 1 - 5
Research Article
Advanced Journal of Microbiology Research ISSN 2241-9837 Vol. 13 (2), pp. 001-006, February, 2019. © International Scholars Journals
Full Length Research Paper
Investigation of the susceptibility of Candida species isolated from denture wearers to different antifungal antibiotics
Ozlem Abaci* and Alev Haliki-Uztan
Department of Biology, Faculty of Science, Ege University, Basic and Industrial Microbiology Section, 35100, Bornova, Izmir, Turkey.
Accepted 08 January, 2019
Abstract
The aim of this study was to determine the the prevalence of in vitro resistance amongst Candida species isolated from the oral cavity of denture wearers. The in vitro susceptibility of 156 Candida isolates to amphotericin B, fluconazole, 5- fluorocytosine, caspofungin and terbinafine was determined. The Clinical Laboratory Standards Institute’ (CLSI; formally National Committee for Clinical Laboratory Standards) broth microdilution method was used and MIC50 and MIC90 determined. Candida albicans, the most frequently isolated strains, are sensitive to amphotericin (61%) and fluconazole (44%), frequently used agents in the treatment of Candida-associated denture stomatitis. A 100% susceptibility to 5- fluorocytosine was observed among the 109 isolates of C. albicans. Among non C. albicans strains only 1 Candida kefyr strain was determined as susceptible dependent upon dose for 5-fluorocytosine. Among Candida glabrata, the second most common isolate, a 100% susceptibility to caspofungin and 5-fluorocytosine were observed. Since the isolates are sensitive to Caspofungin and 5-fluorocytosine, rarely used in the treatment of oral fungal infections, it is suggested that these antifungal agents be used as alternative medicine in the treatment of oral infections especially caused by strains resistant to amphotericin B and fluconazole.
Key words: Candida species, antifungal, denture wearers.
Alev Haliki-Uztan, Ozlem Abaci*
Page: 1 - 6
Research Article
Advanced Journal of Microbiology Research ISSN 2241-9837 Vol. 13 (2), pp. 001-006, February, 2019. © International Scholars Journals
Full Length Research Paper
Isolation and characterization of Acinetobacter sp. ND12 capable of degrading nicotine
Hongjuan Li1, Yanqing Duan2, Guanghui Ma1, Liping Lei3, Ke-Qin Zhang1 and Jinkui Yang1*
1Laboratory for Conservation and Utilization of Bio-Resources, and Key Laboratory for Microbial Resources of the Ministry of Education, Yunnan University, Kunming 650091, P. R., China.
2Technology Centre of Hongyun Honghe Tobacco (Group) Co, Ltd., Kunming 650202, P. R., China.
3Tobacco Agricultural Science Institute of Yunnan Province, Yuxi 653100, P. R., China.
Accepted 19 January, 2019
Abstract
A bacterium strain ND12, was isolated from the tobacco plantation soil and identified as Acinetobacter sp. based on its morphology, physiology, and 16S rRNA gene sequence. The isolate could utilize nicotine as the sole source of carbon and nitrogen, and completely degrade 1.0 g/L nicotine within 14 h at 28°C and pH 6.0. The optimum nicotine concentration for the growth of strain ND12 was 2.5 g/L. Strain ND12 grew at a broader pH range than other reported nicotine-degrading bacteria and showed higher nicotine-degrading activity than those bacteria at acidic environment (pH 4.0). The resting cells of Acinetobacter sp. ND12 could decompose 90% of the nicotine in upper tobacco leaves after treating for 11 h. Moreover, the nicotine metabolites of strain ND12 were analyzed by high performance liquid chromatography (HPLC) and compared with Arthrobacter sp. HJ2-3 and Pseudomonas sp. Nic22. Our results suggested that strain ND12 could be useful for reducing nicotine concentration in nicotine-polluted environments and tobacco wastes.
Key words: Nicotine, biodegradation, Acinetobacter sp. ND12, resting cells, tobacco leaves.
Liping Lei, Hongjuan Li, Ke-Qin Zhang and Jinkui Yang*, Guanghui Ma, Yanqing Duan
Page: 1 - 6
Research Article
Advanced Journal of Microbiology Research ISSN 2241-9837 Vol. 13 (2), pp. 001-005, February, 2019. © International Scholars Journals
Full Length Research Paper
Trichosporon identification methods for isolates obtained from different clinical specimens
Noha El-Mashad1*, Mohamed Taha Mahmoud2 and Heba allah El-Shewehy3
1Department of Clinical Pathology, Mansoura University, Egypt.
2Department of Microbiology (Mycology), Veterinary Medicine, Zagazig University, 44511 Zagazig, Egypt.
3Medical Science (Mycology) Egypt.
Accepted 15 January, 2019
Abstract
Trichosporon is a medically important genus that includes the causative agents of both deep- seated, mucosa-associated infection and superficial infection. In this study, we aimed to present data on the phenotypic and molecular identification of Trichosporon species recovered from various clinical specimens representing both superficial and systemic infections. 397 samples (65 blood cultures, 192 nail scrapings, 140 skin scrapings) were included for isolation, phenotypic and genotypic identification of Trichosporon species. Cases of hematological malignancies, onychomycosis, and Tinea pedis were positive for yeast isolates with percentage of 10.7, 16.6, 20.7%, respectively. Based on the morphologic characters of isolated colonies on Sabouraud dextrose agar (SDA), microscopic examination of colonies on rice agar, and stained smears, yeasts identified as Trichosporon were: 9(4.68%) from nail samples, and 5(3.6%) from skin samples and 0(0.0%) from blood cultures. Polymerase chain reaction (PCR) using Trichosporon genus specific primers for 68 yeast isolates was positive in 16 samples (14 were previously identified by morphology and 2 nail scrapings were falsely diagnosed negative) at 170 bp. We subsequently performed 2 PCR runs on the identified 16 samples using specific primers for each of T. asahii and T. mucoides. Their sequences included ITS1, ITS2. They yielded specific amplification of a DNA fragment at 430 bp in 13(16) samples, which is specific for Trichosporon asahii, and 0(0.0%) sample was positive for Trichosporon mucoides specific primers. Occurance of trichosporonosis is not rare in human. T. asahii species is common in our locality. Molecular methods for identification of Trichosporon are more precise. The standardization of laboratory methods for trichosporon identification and antifungal susceptibility tests are necessary to investigate for both superficial and systemic trichosporonosis.
Key words: Trichosporon asahii, polymerase chain reaction (PCR), Trichosporon mucoides.
Noha El-Mashad*, Mohamed Taha Mahmoud and Heba allah El-Shewehy
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