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Latest Research on Microbiological Characteristics: Dec – 2019

December 27, 2019 by Editor NetKumar

Microbiological characteristics of soils contaminated with heavy metals

In this study, total heavy metal contents and their relationships with soil microbiological characteristics were investigated in agricultural soils which were with polluted heavy metals. Total heavy metal content of the soils varied from 0.95 to 3.20 μg Cd g–1, 17.10 to 42.33 μg Co g–1, 18.43 to 141.18 μg Cr g–1, 23.05 to 96.68 μg Cu g–1, 19.30 to 144.15 μg Pb g–1 and 76.10 to 210.43 μg Ni g–1. Soil dehydrogenase, catalase and urease activity, basal soil respiration and microbial biomass-C were 23.9–420.4 μg TPF g–1 dry soil, 2.7–61.1 ml O2 5 g–1 dry soil, 16.9–749.3 μg N g–1 dry soil, 4.8–33.7 mg CO2 100 g–1 dry soil and three.8–135.4 mg CO2–C 100 g–1 dry soil in agricultural soils of Bafra and Çarşamba Plain, respectively. The soil organic carbon content showed significant correlation with the dehydrogenase activity, catalase activity, basal soil respiration, and microbial biomass-C at P < 0.01. [1]

Clinical and Microbiological Characteristics of Severe Streptococcus pyogenes Disease in Europe

In an attempt to match the epidemiology of severe Streptococcus pyogenes infection within Europe, prospective data were collected through the Strep-EURO program. Surveillance for severe cases of S. pyogenes infection diagnosed during 2003 and 2004 was undertaken in 11 countries across Europe by employing a uniform case definition and questionnaire. Patient data also as bacterial isolates were collected and characterized by T and M/emm typing, and selected strains were analyzed for the presence of superantigen genes. Data were analyzed to match the clinical and microbiological patterns of the infections across the participating countries. an entire of 4,353 isolates were collected from 5,521 cases with severe S. pyogenes infections who were identified. [2]

Clinical and microbiological characteristics of smokers with early onset periodontitis.

Cigarette smoking could also be a possible risk factor which has recently been associated with periodontitis progression. the target of this study was to match the microbial profile of smokers and non‐smokers during a gaggle of patients with early onset periodontitis. The study population consisted of 60 healthy individuals, 40 males and 20 females aged 22 to 35 yr, exhibiting early onset periodontitis. Thirty patients were smokers (30.9 cigarettes/d) and 30 non‐smokers. Smokers had a far better proportion of deep pockets (PD>5 mm), especially within the maxilla anterior and premolar regions (p <0.001) and presented a significantly greater mean probing depth and attachment loss (p<0.05) in diseased sites and a significantly greater alveolar bone loss (p<0.01) compared to non‐smokers. Two pooled bacterial samples were obtained from each patient. Samples were collected from the deepest periodontal pockets of each quadrant. [3]

Clinical and Microbiological Characteristics of Group B Streptococcus from Pregnant Women and Diseased Infants in Intrapartum Antibiotic Prophylaxis Era in Taiwan

Group B Streptococcus (GBS) is one of the foremost important pathogens for neonates. This study included 69 invasive GBS diseases in neonates, including 7 early-onset disease (EOD), 55 late-onset disease, and 7 very-late-onset disease from 2013 to 2017. an enormous reduction of EOD after the deployment of intrapartum antibiotic prophylaxis (IAP) in 2012 was observed. A previously-recognized hypervirulent clone GBS III ST17, accounting for 68% of the overall infections and 71% of the meningitis, was identified among the 69 cases. a totally unique GBS Ia ST890 emerged, becoming the fourth commonest clone. Overall 96% of the invasive GBS infections were caused by serotypes Ia, Ib, and III. [4]

Microbiological Characteristics of White Cheese (Gibna bayda) Manufactured under Traditional Conditions

Aims: This study was conducted to guage the quality control of white cheese (Gibna bayda) processing in traditional plants. White cheese was manufactured using raw cow milk from two areas in North Kordofan (Riash and Cazgail).

Methodology: Samples were collected from four stages of cheese manufacture (raw milk, curd before and after pressing, cheese delivered to the market). Samples were collected in sterile plastic bags stored at 4°C in ice box and transported to the laboratory of Kordofan University for analysis. milk and cheese were microbiologically (total viable bacteria, Staphylococcus aureus, coliform bacteria, lactobacilli bacteria, yeasts and moulds) evaluated during processing stages. [5]

Reference

[1] Kızılkaya, R., Aşkın, T., Bayraklı, B. and Sağlam, M., 2004. Microbiological characteristics of soils contaminated with heavy metals. European Journal of Soil Biology, 40(2), (Web Link)

[2] Luca-Harari, B., Darenberg, J., Neal, S., Siljander, T., Strakova, L., Tanna, A., Creti, R., Ekelund, K., Koliou, M., Tassios, P.T. and van der Linden, M., 2009. Clinical and microbiological characteristics of severe Streptococcus pyogenes disease in Europe. Journal of clinical microbiology, 47(4), (Web Link)

[3] Kamma, J.J., Nakou, M. and Baehni, P.C., 1999. Clinical and microbiological characteristics of smokers with early onset periodontitis. Journal of periodontal research, 34(1), (Web Link)

[4] Clinical and Microbiological Characteristics of Group B Streptococcus from Pregnant Women and Diseased Infants in Intrapartum Antibiotic Prophylaxis Era in Taiwan
Chien-Chung Lee, Jen-Fu Hsu, Rajendra Prasad Janapatla, Chyi-Liang Chen, Ying-Li Zhou, Reyin Lien & Cheng-Hsun Chiu
Scientific Reports volume 9, (Web Link)

[5] Osman Mohamed Abdalla, M. and Eisa Ahmed Omer, H. (2017) “Microbiological Characteristics of White Cheese (Gibna bayda) Manufactured under Traditional Conditions”, Journal of Advances in Microbiology, 2(3), (Web Link)

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