There are many bidirectional communication and crosstalk between microbes and host plants. The plant-pathogen interaction directly affects the survival of host plants, while the interaction between plants and their probiotics benefits both. Plant miRNA responds quickly to pathogenic or beneficial microbes when they enter the plant tissues, while microbes also produce miRNA-like RNA (milRNA) to affect plant health. These means miRNA or milRNA is an important fast-responding molecular mediator in plant-microbe interactions, and these internal mechanisms have been better understood in recent years. This review summarized the regulatory roles of miRNA in plant-pathogens and plant-probiotics interaction. The regulatory role of miRNA in disease resistance of host plants during plant-pathogens interaction, and the regulatory role of miRNA in promoting host growth and development during plant-probiotics interaction, as well as the cross-kingdom regulatory role of milRNA in host plants, were discussed in-depth.
Disease Resistance ; MicroRNAs/genetics* ; Microbial Interactions ; Plants/genetics*

The facultative anaerobic and strict anaerobic microorganisms enriched and acclimated during the anaerobic digestion process are crucial for the efficiency of the anaerobic digestion system. Most of the problems encountered during running anaerobic digestion processes could be effectively improved via stimulation of microbial metabolic activity. Benefited from the rapid development of microbiome techniques, deeper insights into the microbial diversity in anaerobic digestion systems, e.g. the microbe-microbe interactions and microbe-environment interactions, have been gained. A complex and intricate metabolic network exists in the anaerobic digestion system of solid organic wastes. However, little is known about these interactions and the underlying mechanisms. This review briefly summarized the representative interactions between microbial communities during anaerobic digestion process discovered to date. In addition, typical issues encountered during the anaerobic digestion of solid organic wastes and how microbes can tackle and alleviate these issues were discussed. Finally, future priorities on microbiome research were proposed based on present contribution of microbiome analysis in anaerobic digestion system.
Anaerobiosis ; Bioreactors ; Methane ; Microbial Interactions ; Microbiota ; Solid Waste

OBJECTIVETo study the effect of calcium hydroxide solutions at different pH values on the cell-surface hydrophobicity of starved Enterococcus faecalis.

METHODSE. faecalis in starvation were harvested and incubated in freshly prepared calcium hydroxide solutions at the pH values ranging from 7.3 to 10.3 for 15 min or 60 min. The cell-surface hydrophobicity of the starved E. faecalis was evaluated by measuring microbial adhesion to hydrocarbons (MATH). Scanning electron microscopy was used to investigate the adhesion capability of starved E. faecalis cells incubated on human dentin at different pH levels.

RESULTSFor the same duration of treatment, increased pH value of calcium hydroxide solution significantly enhanced the cell-surface hydrophobicity of starved E. faecalis (P<0.01). At the same pH value, the cell-surface hydrophobicity of the bacterium increased significantly with time (P<0.05, 15 min vs 60 min). Scanning electron microscopy revealed a significantly increased adhesion of the starved cells on human dentin as the pH value and incubation time increased.

CONCLUSIONCalcium hydroxide solutions promote the adhesion of starved E. faecalis by modifying its cell-surface hydrophobicity.

PURPOSE: The purpose of this study was to check the degree of residual microbial contamination after disinfection of reusable suction containers, used in an intensive care unit (ICU) and present basic data for efficient use through cost analysis in comparison to disposable suction containers. METHODS: This study was conducted on 32 reusable suction containers used in an ICU on a selected specific day. After disinfection and washing, specimens were collected from the used containers and cultured to check for microbial contamination. Additionally, a comparative narrative study analyzes the cost of using reusable suction containers and disposable suction containers. Data were analyzed with the SPSS WIN 20.0 program using real numbers and percentage χ²-test. RESULTS: As a result of the study, microorganisms were found in all samples where in 30 were gram-positive (62.5%) while 13 were gram-negative (27.1%). Based on level of contamination, microorganisms were less than 10CFU/ml in 18 samples (56.3%); 11–99CFU/ml in six samples (18.8%); and more than 100CFU/ml in eight samples (25%). Cost per day for a reusable suction container was 10,655 + α while cost per day for a disposable suction container was 10,666 won. CONCLUSION: This study found that reusable suction containers, even after disinfection, accounted for factors of potential infection as well as microbial contamination. So, disposable suction containers are superior in cost-effectiveness and highly efficient for use with infected patients.
Costs and Cost Analysis ; Disinfection ; Drainage ; Humans ; Intensive Care Units ; Microbial Interactions ; Suction

The human respiratory tract hosts both pathogenic and commensal bacteria. The development of well-conserved 16S rRNA sequencing and culture-independent techniques has enabled many achievements in the study of the human microbiome. Microbial composition of the respiratory tract in early childhood has been shown to correlate to respiratory health in later stages of life. This review highlights current understandings of respiratory microbiota development in healthy children, examples of microbial interactions, impacts on the host immune system, and the relationship between respiratory tract microbiome and respiratory health.
Bacteria ; Child ; Humans ; Immune System ; Microbial Interactions ; Microbiota ; Respiratory System ; Respiratory Tract Infections

As specialized intracellular parasite, viruses have no ability to metabolize independently, so they completely depend on the metabolic mechanism of host cells. Viruses use the energy and precursors provided by the metabolic network of the host cells to drive their replication, assembly and release. Namely, viruses hijack the host cells metabolism to achieve their own replication and proliferation. In addition, viruses can also affect host cell metabolism by the expression of auxiliary metabolic genes (AMGs), affecting carbon, nitrogen, phosphorus, and sulfur cycles, and participate in microbial-driven biogeochemical cycling. This review summarizes the effect of viral infection on the host's core metabolic pathway from four aspects: cellular glucose metabolism, glutamine metabolism, fatty acid metabolism, and viral AMGs on host metabolism. It may facilitate in-depth understanding of virus-host interactions, and provide a theoretical basis for the treatment of viral diseases through metabolic intervention.
Humans ; Metabolic Networks and Pathways ; Virus Diseases ; Carbohydrate Metabolism ; Host Microbial Interactions ; Lipid Metabolism

Fecal microbiota transplantation (FMT) has become a research focus of biomedicine and clinical medicine in recent years. The clinical response from FMT for different diseases provided evidence for microbiota-host interactions associated with various disorders, including Clostridium difficile infection, inflammatory bowel disease, diabetes mellitus, cancer, liver cirrhosis, gut-brain disease and others. To discuss the experiences of using microbes to treat human diseases from ancient China to current era should be important in moving standardized FMT forward and achieving a better future. Here, we review the changing concept of microbiota transplantation from FMT to selective microbiota transplantation, methodology development of FMT and step-up FMT strategy based on literature and state experts' perspectives.
Clostridium Infections ; therapy ; Fecal Microbiota Transplantation ; methods ; standards ; Host Microbial Interactions ; Humans ; Inflammatory Bowel Diseases ; therapy ; Metabolic Diseases ; therapy

BACKGROUND: The female genital tract is equipped to deal with a variety of foreign substances including a wide array of microorganisms. It is important to consider Candida-bacterial interactions in balance between healthy colonization versus vaginitis. The objectives of this study were to evaluate the association between microorganism distribution and vaginitis, and to investigate the possibility of an interaction between vaginal Candida and other microorganisms in female genital tract. METHODS: A total of 516 vaginal secretions were collected between October 2008 and June 2010 from patients with suspected vaginitis. Identification of Candida species and detection of 6 fastidious microorganisms (Trichomonas vaginalis, Neisseria gonorrhoeae, Chlamydia trachomatis, Mycoplasma hominis, Mycoplasma genitalium, and Ureaplasma urealyticum) were performed using a VITEK 2 system (bioMerieux, Inc., Hazelwood, MO, USA) and multiplex PCR (Seegene, Biotechnology, Inc., Seoul, Korea), respectively. RESULTS: M. genitalium, U. urealyticum, and C. trachomatis were more often detected in association with vaginal candidiasis. A statistically significant association between Candida and M. genitalium was observed (P<0.05). N. gonorrhoeae was detected less often in women with vaginal candidiasis. CONCLUSION: The results of this study suggest the possibility that vaginal Candida may associate with some microorganisms in patients with vaginitis. Further studies will be required to define the Candida-bacterial interactions and its mechanisms.
Bacteria ; Biotechnology ; Candida ; Candidiasis ; Chlamydia trachomatis ; Colon ; Female ; Humans ; Microbial Interactions ; Multiplex Polymerase Chain Reaction ; Mycoplasma genitalium ; Mycoplasma hominis ; Neisseria gonorrhoeae ; Trichomonas vaginalis ; Ureaplasma ; Vaginitis

Helicobacter pylori (H. pylori) is known be an etiologic factor for gastric and duodenal ulcer, gastric noncardiac adenocarcinoma, and MALT lymphoma in a subset of infected individuals. Pathogenesis of H. pylori infection is based on the long term host to bacterial interaction and may be affected by various virulence factors of the bacterium, environmental, and host factors (age, sex, blood type). Mucosal inflammation is the basic principle mechanism underlying the disease development in which tissue destruction may be initiated and maintained by both the bacterial toxins (cagA, vacA) and host immune responses. Immune evasion by bacterial modulation of host response affects the long term colonization of the microbe. Colonization is also affected by urease and/or motility of the bacterium, lipopolysaccharide, and others. Investigation into the pathogenesis of H. pylori related diseases based on bacterial virulence factors could provide answer to the impact of chronic host to microbial interaction resulting in human diseases.
Adenocarcinoma ; Bacterial Toxins ; Colon ; Duodenal Ulcer ; Helicobacter pylori* ; Helicobacter* ; Humans ; Immune Evasion ; Inflammation ; Lymphoma, B-Cell, Marginal Zone ; Microbial Interactions ; Urease ; Virulence Factors* ; Virulence*

Topical anesthetics are commonly used in oral & maxillofacial surgery to control pain in the oral cavity mucosa before local anesthetic injection. These anesthetic agents come in many forms, developed for different usages, to minimize adverse reactions, and for optimal anesthetic efficiency. Earlier studies have revealed that these agents may also limit the growth of microorganisms in the area of anesthetic application. Many topical anesthetic agents show different levels of antimicrobial activity against various bacterial strains and Candida. The dosage of local anesthetic agent used in some clinical preparations is too low to show a significant effect on microbial activity. Efficiency of antimicrobial activity depends on the local anesthetic agent's properties of diffusion within the bloodstream and binding efficiency with cytoplasmic membrane, which is followed by disruption of the bacterial cell membrane. The antimicrobial properties of these agents may extend their usage in patients to both control pain and infection. To develop the topical local anesthetic optimal usage and antimicrobial effect, a collaborating antiseptic agent may be used to benefit the local anesthetic. However, more research is required regarding minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC) of topical local anesthetic agents with drug interaction between anesthetics and antiseptic agents.
Anesthetics ; Anesthetics, Local ; Anti-Infective Agents ; Candida ; Cell Membrane ; Dentistry ; Diffusion ; Drug Interactions ; Humans ; Microbial Sensitivity Tests ; Mouth ; Mucous Membrane ; Surgery, Oral