Antonie van Leeuwenhoek

Thu, 01/21/2021 - 02:01
Isolation of novel actinobacteria from unexplored habitats as potential sources of novel drug leads has utmost importance. During the course of screening arid soil samples for novel actinobacteria, strain H3C3T was isolated from Malatya, Turkey and its taxonomic position was revealed by a genome-based polyphasic approach. Pairwise sequence comparison of the 16S rRNA gene showed that the strain is...
Mon, 01/04/2021 - 02:01
A Gram-staining-negative bacterium, strain HHU 13199T, was isolated from a marine sediment sample collected from South China Sea (119°19.896’E, 19°41.569’N) at a depth of 2918 m. The 16S rRNA gene sequence analysis indicated that strain HHU 13199T represents a member of the genus Salinimonas with the highest sequence similarity (99.8%) to the type strain S. iocasae KX18D6T. However, the average...
Thu, 11/12/2020 - 02:02
Bacillus cereus sensu lato strains (B. cereus group) are widely distributed in nature and have received interest for decades due to their importance in insect pest management, food production and their positive and negative repercussions in human health. Consideration of practical uses such as virulence, physiology, morphology, or ill-defined features have been applied to describe and classify...
Sat, 11/07/2020 - 02:02
The use of compost extracts is steadily increasing, offering an attractive way for plant growth enhancement and disease management replacing chemical pesticides. In this study, potential mechanisms involved in plant growth promotion and suppressive activity against fungal diseases, of a compost extract produced from poultry manure/olive husk compost, were investigated. Results of physico-chemical...
Fri, 09/25/2020 - 02:02
The current study focuses on the tolerance of a strain of Halobacterium salinarum isolated from Sfax solar saltern (Tunisia) towards cadmium (Cd), lead (Pb), nickel (Ni), zinc (Zn), and copper (Cu) by using agar dilution methods in complex and minimal media. The results showed the least inhibitory metals based on Minimum Inhibitory Concentrations (MICs) were lead (MIC = 4.5 mM), cadmium (MIC = 4 ...
Mon, 09/21/2020 - 02:02
A novel Gram-negative, aerobic, motile and short rod-shaped bacterium with exopolysaccharides production, designated as LZ-4T, was isolated from cultivable phycosphere microbiota of harmful algal blooms-causing marine dinoflagellate Alexandrium catenella LZT09 which produces paralytic shellfish poisoning toxins. Strain LZ-4T was able to use thiosulfate (optimum concentration 10 mM) as energy...
Sun, 09/13/2020 - 02:02
The study reports protective role of potential probiotic cultures against infection by biofilm forming Cronobacter sakazakii in Caenorhabditis elegans model system. Among the fifteen indigenous potential probiotics, the cell free supernatant of Lactobacillus gastricus BTM7 possessed highest antimicrobial action and biofilm inhibition against C. sakazakii. The competitive exclusion assays revealed...
Sun, 09/06/2020 - 02:03
Quorum sensing (QS) is a mechanism of intercellular communication in bacteria that received substantial attention as alternate strategy for combating bacterial resistance and the development of new anti-infective agents. The present investigation reports on the assessment of using subinhibitory concentrations of antibiotics for the inhibition of QS-regulated phenotypes in Chromobacterium...
Fri, 08/07/2020 - 02:02
Aspergillus ochraceus is a soil fungus known to produce ochratoxin A, a harmful secondary metabolite. Prevention and control of fungal pathogens mostly rely on chemical fungicides, which is one of the contributing factors in the emergence of the fungal resistance, hence novel methods for fungal eradication have been extensively researched. The cold atmospheric pressure (CAP) plasma generated in...
Fri, 07/24/2020 - 02:02
Atypical brucellae show deviant phenotypes and/or genotypes. Besides Brucella inopinata, B. microti and B. vulpis, atypical strains have been described infecting humans, rodents, amphibians and fish. They represent potential zoonotic agents. Here, we provide evidence that reptiles as the remaining poikilothermic vertebrate class also represent susceptible hosts for atypical Brucella.
Wed, 07/22/2020 - 02:02
Examination of genes encoding for the virulence factors, hemolysin/cytolysin (vvhA) and capsular polysaccharide (CPS allele 1), during biofilm formation revealed that their expression was influenced by the maturity of the biofilm as well as by temperature. At 24 °C, expression of vvhA during biofilm formation was low between 4 and 12 h but increased 10-fold by 24 h to (5.1 × 104 ± 6.3 × 103mRNA...
Wed, 07/08/2020 - 02:02
Larvae of Hermetia illucens, commonly known as black soldier fly, efficiently convert organic waste into nutrient-rich supplements for different applications. Here we performed a preliminary experiment to investigate the dynamics of the H. illucens gut microbiota and changes in the composition of the bacterial community in the residue of the larval feed during rearing. We furthermore quantified...
Wed, 07/01/2020 - 02:02
Bacterial septicemia commonly occurs and usually cause huge losses in sericulture industry. Here, two pathogenic bacterial strains were isolated from dead silkworm and named as ZJ-1 and ZJ-2. Phenotypic and genotypic analysis results revealed that both of these two strains are closely related to Serratia marcescens (S. marcescens). The morphological as well as physiological and biochemical...
Tue, 06/30/2020 - 02:02
Hydrogen sulfide (H2S) detection is a screening method for distinguishing and identifying Salmonella strains from other bacteria in the intestine. Incidences of H2S-negative Salmonella have recently been reported in different countries. Although a high resistance rate against antimicrobial agents has been reported for H2S-positive Salmonella in many regions of the world, there is increasing...
Tue, 05/19/2020 - 03:24
The ydcI gene has previously been shown to encode a DNA-binding protein involved with acid stress resistance and induced biofilm formation in a strain of Salmonella enterica serovar Typhimurium. In addition, characterisation of the ydcI gene in Escherichia coli and other bacteria demonstrated strikingly different tolerance for induced ydcI expression across Gram negative species. In this report,...
Mon, 03/23/2020 - 03:17
An aerobic, Gram-stain-negative, motile and rod-shaped bacterial strain, designated as Z1-4T, was isolated from the phycosphere microbiota of marine dinoflagellate Alexandrium minutum that produces paralytic shellfish poisoning toxins. Phylogenetic analysis based on 16S rRNA gene sequences showed that the new isolate belongs to the genus Mesorhizobium, and it was closely related to Mesorhizobium...
Thu, 01/09/2020 - 03:26
Aquatic pathogen Aeromonas hydrophila produces an array of virulence factors, many of which are excreted proteins that causes infectious disease in fish, reptiles, and humans. Aerolysin, a haemolytic toxin, is the most well-known of the A. hydrophila virulence factors and is encoded by aerA. Although used as a virulence gene marker in several studies, recent whole-genome sequencing data suggest...
Tue, 11/26/2019 - 03:16
A novel Gram-negative, aerobic, motile and rod-shaped bacterium with the potential to biodegrade polycyclic aromatic hydrocarbons, was isolated from Khazar (Caspian) Sea. Strain TBZ2T grows in the absence of NaCl and tolerates up to 8.5% NaCl. Growth occurred at pH 3.0–10.0 (optimum, pH 6.0–7.0) and 10–45 °C (optimum, 30 °C). The major fatty acids are C18:1ω7C, C16:1ω7C/ C15:0 iso 2-OH, C16:0,...
Thu, 10/24/2019 - 03:20
Streptococcus suis (S. suis) is one of the most common swine pathogens in the swine industry and leads to great harm to the normal progress of the swine industry. S. suis can also infect humans and cause a variety of fatal diseases, such as meningitis and streptococcal toxic shock syndrome, that pose a major threat to the safety of life and health of both humans and animals. In this paper, we...
Sun, 10/20/2019 - 03:19
Foodborne Enterobacteriaceae pathogens, especially Salmonella, still seriously threaten food safety. To establish a foundation for further developing phage- and endolysin-based methods combating these pathogens, in this study, the newly isolated Salmonella-virus-FelixO1 phage BPS15S6 for biocontrol purposes was characterised by genomic bioinformatic analysis, and then its endolysin LyS15S6 was...
Mon, 09/23/2019 - 03:14
Arthrobacter sp. are Gram-positive bacilli commonly obtained from soil and in the hospital environment. These species have been reported to cause several types of infection. Heavy metals are a threat to the ecological system due to their high-levels of toxicity and the fluoroquinolones are antimicrobials widely used for the treatment of different bacterial infections. The aim of this study was to...