| 1. |
- Islam, Md Aminul, et al.
(författare)
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An Estimation of Five-decade Long Monkeypox Case Fatality Rate : Systematic Review and Meta-analysis
- 2022
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Ingår i: JOURNAL OF PURE AND APPLIED MICROBIOLOGY. - : DR M N KHAN. - 0973-7510. ; 16, s. 3036-3047
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Forskningsöversikt (refereegranskat)abstract
- On July 23, 2022 the World Health Organization (WHO) has announced the Monkeypox disease (MPXD) as a worldwide public health issue. This study conducts a systematic review and meta-analysis to determine the overall case fatality rate (CFR) of MPXD worldwide during 1970-2022. The tenure-tracked MPXD outbreaks associated with CFR were calculated based on available published data from six different periods (i.e., 1970-79, 1980-89, 1990-99, 2000-09, 2010-19, and 2000-2022). A total of 229 peer-reviewed accessible articles were investigated, of which, 17 articles met the inclusion and exclusion criteria. Most of the studies on MPXD CFR were published in the Democratic Republic of the Congo (DRC) providing 47% of data for the current meta-analysis. The overall pooled CFR of MPXD was 4.14% (range: 0.62% - 9.51%) during 1970-2022. In this study, total of 379 death cases were found from published MPXV based research articles where the pooled estimate CFR was 1.87%. The pooled CFR was higher during the earlier outbreak of the MPXD such as 10.71% in 1970-1979. With the progress of time, the CFR from MPXD followed a decreasing trend and reached 5.38% in 1980-1999 and 4.45% in 2000-2022. Young male children aged< 10 years were found to experience the worst outcome with a CFR of >73.0%. This is the first meta-analysis using 52 years of data which indicates that the CFR of MPXV is decreasing from previous years. The findings of this meta-analysis might be paramount for the policymakers to tackle MPXD and minimize the overall CFR of MPXD through strategic actions.
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| 2. |
- Islam, Md Aminul, et al.
(författare)
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Old Enemy with a New Face : Re-emerging Monkeypox Disease - An Update
- 2022
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Ingår i: JOURNAL OF PURE AND APPLIED MICROBIOLOGY. - : DR M N KHAN. - 0973-7510. ; 16, s. 2972-2988
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Forskningsöversikt (refereegranskat)abstract
- Human monkeypox (MPX), a multi-country re-emerging disease, is rapidly spreading around the world. The etiological agent of this disease, Monkeypox virus (MPXV), is a DNA virus classified into three genetic types (West Africa, Congo Basin clade, and one new clade-3). Atypical or unusual symptoms as well as asymptomatic infection of MPXV has also been reported. Transmission among humans is possible by droplets, contact, sexual intercourse, and fomites. Secondary transmission of this disease has been reported to occur in less than 10% of cases where it was found 35%-88% of smallpox. Mother-to-fetus transmission by vertical route is also possible for this disease. Modern equipment, biosafety level-3 laboratory facilities, and trained expert persons are needed to diagnose this disease. Previous data support that similar to 85% clinical protection is provided by smallpox vaccines for monkeypox, although initially non-human primates models were used for various experiments, and also side-effects of this vaccine have been notably mentioned in various studies. Limited research findings of JYNNEOS vaccine has supported the comparatively lower prevalence of MPX cases with vaccination. Few drugs, including cidofovir, tecovirimat, brincidofovir, and vaccinia immune globulin intravenous are preferable against this disease, although clinical trial data is limited and FDA-approval is also pending. This review-based study presents an overall scenario of Monkeypox disease (MPXD) based on previously published studies. Recommended clinical treatment and vaccination, appropriate infection prevention and control strategies, adopting one health approach, and quick identification of hotspots using a wastewater-based surveillance system need to be followed to check the further spread of MPX outbreaks.
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| 3. |
- Kaur-Kahlon, Gurpreet, et al.
(författare)
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Quorum Sensing Regulation of Virulence Gene Expression in Vibrio harveyi during its Interaction with Marine Diatom Skeletonema marinoi
- 2021
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Ingår i: Journal of Pure and Applied Microbiology. - : Journal of Pure and Applied Microbiology. - 0973-7510 .- 2581-690X. ; 15:4, s. 2507-2519
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Tidskriftsartikel (refereegranskat)abstract
- Communication between species from different kingdoms may be as important as intra-kingdom communication. It has recently been confirmed that co-existing bacteria and phytoplankton in aquatic ecosystems do cross-talk. This study examined the signs of possible cross signalling between V. harveyi, one of the predominant bacterial species of the marine ecosystem and a dominant diatom species, S.marinoi, to understand communication over species borders. It is known that V.harveyi employ quorum sensing for cell-to-cell communication, bioluminescence (luxR), and the regulation of the virulence gene (vhp, chiA). Former studies have also shown, this kind of interactions being disrupted by compounds secreted by a few algal species existing in the aquatic ecosystem. We investigated the QS communication by quantifying the expression levels of virulence regulator luxR and virulence factors metalloprotease (vhp) and chitinase (chiA) in four different V. harveyi strains grown in the presence of S. marinoi strain. Results obtained in this study indicate that quorum sensing was activated in strains of V. harveyi analysed but did not regulate the expressions of vhp and chiA virulence factors. This observation suggests that the existence of S. marinoi did not interfere with the QS behavior of V. harveyi and its interaction with marine diatom; it may be due to the commensalism relationship.
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| 4. |
- Khodaverdi, M., et al.
(författare)
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Kinetic modeling of rapid enzymatic hydrolysis of crystalline cellulose after pretreatment by NMMO
- 2012
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Ingår i: Journal of Industrial Microbiology and Biotechnology. - : Oxford University Press (OUP). - 1367-5435 .- 1476-5535 .- 0973-7510. ; 39:3, s. 429-438
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Tidskriftsartikel (refereegranskat)abstract
- Pretreatment of cellulose with an industrial cellulosic solvent, N-methylmorpholine-N-oxide, showed promising results in increasing the rate of subsequent enzymatic hydrolysis. Cotton linter was used as high crystalline cellulose. After the pretreatment, the cellulose was almost completely hydrolyzed in less than 12 h, using low enzyme loading (15 FPU/g cellulose). The pretreatment significantly decreased the total crystallinity of cellulose from 7.1 to 3.3, and drastically increased the enzyme adsorption capacity of cellulose by approximately 42 times. A semi-mechanistic model was used to describe the relationship between the cellulose concentration and the enzyme loading. In this model, two reactions for heterogeneous reaction of cellulose to glucose and cellobiose, and a homogenous reaction for cellobiose conversion to glucose was incorporated. The Langmuir model was applied to model the adsorption of cellulase onto the treated cellulose. The competitive inhibition was also considered for the effects of sugar inhibition on the rate of enzymatic hydrolysis. The kinetic parameters of the model were estimated by experimental results and evaluated.
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| 5. |
- Mulchandani, Rupa, et al.
(författare)
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Helicobacter pylori : Is it Transmitted Through Faecal-oral or Oral-oral Route?
- 2013
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Ingår i: Journal of Pure and Applied Microbiology. - 0973-7510. ; 7:3, s. 2429-2438
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Tidskriftsartikel (refereegranskat)abstract
- The association of Helicobacter pylori with gastroduodenal diseases is well established. The mode of transmission of the organism is still unclear, although the faecal-oral route has been proposed. H. pylori has been detected in gastric antrum, dental plaques, faeces and water. In the light of these studies we attempted to detect H. pylori in antral biopsies, dental plaques, and stool specimens of patients who were suffering from upper GI complaints. These patients resided in Mumbai city, India. Clinical specimens from different sources were subjected to RUT, Culture, Histopathology and Polymerase chain reaction (PCR). We found H. pylori in antral biopsies and faeces by culture and PCR but absent in dental plaques. Therefore, faecal-oral is the possible route of transmission of this bacterium. Dental plaque may not be a permanent reservoir of this bacterium because this organism needs strict microaerophilic conditions to survive.
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| 6. |
- Mulchandani, Rupa, et al.
(författare)
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Presence of Helicobacter pylori in Mumbai Water
- 2013
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Ingår i: Journal of Pure and Applied Microbiology. - 0973-7510. ; 7:3, s. 2315-2324
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Tidskriftsartikel (refereegranskat)abstract
- Helicobacter pylon is found commonly in the gut of the human beings and animals. This bacterium is found usually when patients suffer from upper GI infections. H. pylon has been found in the patients in antral biopsies in Mumbai, India. We have found H. pylon in antral biopsies and faeces in another Study we have done. The mode of transmission of H. pylon is yet not confirmed although two routes are proposed : faecal-oral and oral-oral. Many studies have found that H. pylon survives in water in viable or viable but non-culturable forms. We found H. pylon in Mumbai water samples collected from different places by culture and PCR. Thus, we propose water as the possible vehicle of transmission of H. pylon infection.
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| 7. |
- Othman, Nor Zalina, et al.
(författare)
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Aeration rate effect on the growth kinetics, phytase production and plasmid stability of recombinant Escherichia coli BL21 (DE3)
- 2014
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Ingår i: Journal of Pure and Applied Microbiology. - 0973-7510. ; 8:4, s. 2721-2728
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Tidskriftsartikel (refereegranskat)abstract
- Phytase production using Escherichia coli BL21 (DE3), a recombinant strain harboring a plasmid encoding thermostable Bacillus phytase, in semi-industrial scale was studied in this work. Among the factors needed to be considered in order to achieve high enzyme yield, aeration rate plays an important role. Suitable aeration is required to supply cells with sufficient amount of air for cell and phytase production. The effect of different aeration rates, (1.0, 2.0 and 3.0 vv-1min-1), on the kinetics of cell growth and phytase production by the recombinant E. coli BL21 (DE3) in 16-L pilot scale stirred tank bioreactor was investigated. The highest cell concentration of 3.81 gL-1 concomitant with the maximal total phytase production of 15.63 UmL-1 were obtained in a bioreactor of aeration rate 3.0vv-1min-1. At this high aeration rate, a maximal specific growth rate (μmax) and the maximal specific phytase production of 0.33 h-1 and 4102Ug-1, respectively, were achieved.
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