Category: Microbiology

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News Update on Bacterial Activity: September 2021

  Anti-bacterial activity of some Brazilian medicinal plants Extracts from various organs of 25 plants of Brazilian traditional medicine were assayed with respect to their anti-bacterial activities against Escherichia coli, a susceptible strain of Staphylococcus aureus and two resistant strains of Staphylococcus aureus harbouring the efflux pumps NorA and MsrA. Amongst the 49 extracts studied,…
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September 25, 2021 0

Latest Research on English Learning : September 2021

Climate change alters ecological strategies of soil bacteria The timing and magnitude of rainfall events are expected to change in future decades, resulting in longer drought periods and larger rainfall events. Although microbial community composition and function are both sensitive to changes in rainfall, it is unclear whether this is because taxa adopt strategies that…
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September 20, 2021 0

Latest Research News on Alternaria: March 2021

Alternaria spp.: from general saprophyte to specific parasite Alternaria species are mainly saprophytic fungi. However, some species have acquired pathogenic capacities collectively causing disease over a broad host range. This review summarizes the knowledge on pathogenic strategies employed by the fungus to plunder the host. Furthermore, strategies employed by potential host plants in order to ward off…
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March 27, 2021 0

Multiple Choice Questions in Microbial Molecular Genetics

The MCQ exam will focus on the content delivered in the different sessions that you have performed during your course. Material for the MCQ exam can be drawn from a number of sources, but will be based largely on lecture content in the course. In this book, the multiple choice questions have been prepared with…
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September 14, 2020 0

Latest News on Trichoderma Harzianum Research: Jan – 2020

Degradation of plant pathogenic fungi by Trichoderma harzianum Trichoderma harzianum excreted β-1, 3-glucanase and chitinase into the medium when grown on laminarin and chitin, respectively, or on cell walls of the pathogen Sclerotium rolfsii, as sole carbon source. Trichoderma harzianum also showed high activity of both enzymes when grown on homogenized S. rolfsii sclerotia. Glucanase…
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January 7, 2020 0

News Update on Plasmodium Berghei Research: Jan – 2020

Drug resistance in Plasmodium bergheiVincke and Lips, 1948. I. Chloroquine resistance By treating mice infected with Plasmodium bergheiVincke and Lips, 1948, with increasing doses of chloroquine parenterally, a strain (RC) was developed which was immune to the utmost dose of the drug which the host could tolerate. The ED50 (dose which produced a 50% suppression…
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January 6, 2020 0

Latest Research News on Vaccination: Jan – 2020

Chitosan for mucosal vaccination The striking advantage of mucosal vaccination is that the production of local antibodies at the sites where pathogens enter the body. Because vaccines alone aren’t sufficiently haunted after mucosal administration, they have to be co-administered with penetration enhancers, adjuvants or encapsulated in particles. Chitosan easily forms microparticles and nanoparticles which encapsulate…
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January 3, 2020 0

Latest Research News on Salmonella Typhimurium: Jan – 2020

Transformation of Salmonella typhimurium by Plasmid Deoxyribonucleic Acid A modified transformation procedure that’s effective for the introduction of plasmid desoxyribonucleic acid at high frequency into Salmonella typhimurium , also as into Escherichia coli , is described. Transformed bacteria acquire a circular desoxyribonucleic acid species having the genetic and molecular characteristics of the reworking plasmid. [1]…
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January 2, 2020 0

Latest Research News on Streptococcus Mutans: Jan – 2020

A selective medium for Streptococcus mutans A selective medium was developed for the isolation of Streptococcus mutans from human bacterial plaque. Mitis-salivarius agar was modified by adding 0.2 units/ml bacitracin and by increasing the sucrose concentration to twenty per cent. At these concentrations, the selective agents allowed the undiminished recovery of Strep. mutans with maximum…
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January 1, 2020 0

News Update on Virus Research: Dec – 2019

Virus interference. I. The interferon During a study of the interference produced by heat-inactivated influenza virus with the expansion of live virus in fragments of chick chorio-allantoic membrane it had been found that following incubation of heated virus with membrane a replacement factor was released. This factor, recognized by its ability to induce interference in…
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December 31, 2019 0