Analysis of the Harm and Potential Risk of Pathogenic Bacteria to Wild Paphiopedilum in Mulun Nature Reserve

2021 ◽  
Vol 3 (1) ◽  
pp. 1-14
Author(s):  
Zheng Lingling ◽  
Yang Jingjing ◽  
Lin Hanye ◽  
Zhong Qixuan ◽  
Chen Le ◽  
...  
Keyword(s):  
Potential Risk ◽  
Pathogenic Bacteria ◽  
Nature Reserve

scholarly journals Emerging evidence for associations between periodontitis and the development of Alzheimer’s disease

2014 ◽  
Vol 5 (1) ◽  
pp. 38-42 ◽  
Author(s):  
Sophie Poole ◽  
Sim K Singhrao ◽  
St John Crean
Keyword(s):  
Alzheimer’S Disease ◽  
Alzheimer's Disease ◽  
Risk Factor ◽  
Immune Responses ◽  
Periodontal Disease ◽  
Potential Risk ◽  
Inflammatory Disease ◽  
Pathogenic Bacteria ◽  
Late Onset ◽  
Systemic Circulation

Periodontal disease (PD) is an inflammatory disease affecting tooth-supporting tissues in which interaction of specific bacteria and the host’s immune responses play a pivotal role. The pathogenic bacteria associated with PD are a source of systemic inflammation as they have the ability to enter systemic circulation during everyday tasks such as brushing teeth and chewing food. Alzheimer’s disease (AD) is a form of dementia whereby inflammation is thought to play a key role in its pathogenesis and the risk of developing the disease increasing with age. The exact aetiology of the late-onset AD is unknown but peripheral infections are being considered as a potential risk factor.

scholarly journals Cockroaches as carriers of bacteria in multi-family dwellings

1992 ◽  
Vol 109 (3) ◽  
pp. 483-490 ◽  
Author(s):  
A. Cloarec ◽  
C. Rivault ◽  
F. Fontaine ◽  
A. Le Guyader
Keyword(s):  
Low Income ◽  
Potential Risk ◽  
Pathogenic Bacteria ◽  
Bacterial Species ◽  
Bacterial Flora ◽  
Blattella Germanica ◽  
Enterobacter Cloacae ◽  
Low Level ◽  
Bacterial Dissemination

SUMMARYThe potential risk of bacterial dissemination due to the presence of cockroaches (Blattella germanica, Blattellidae) in low-income flats was investigated. Cockroaches can carry a great variety of bacterial species; we identified 30 different species from 52 different flats. Klebsiella oxycytoca, K. pneumoniae and Enterobacter cloacae were the most frequently found. Pathogenic and potentially pathogenic bacteria represented 54% of all the bacterial identifications. Bacteria were carried either on the cuticle or in the gut. Contamination through external contact is sufficient to insure bacterial diffusion. There was a very low level of overlap estimated by Pianka's index (a) between the bacterial flora of neighbouring blocks of flats, and (b) between bacterial flora of different flats in the same block.

scholarly journals Effects of foraging site distances on the intestinal bacterial community compositions of the sympatric wintering Hooded Crane (Grus monacha) and Domestic Duck (Anas platyrhynchos domesticus)

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Wei Wang ◽  
Lizhi Zhou ◽  
Rong Fu ◽  
Lei Cheng ◽  
Shaofei Yan ◽  
...  
Keyword(s):  
Pathogenic Bacteria ◽  
Nature Reserve ◽  
Anas Platyrhynchos ◽  
Intestinal Flora ◽  
Wild Birds ◽  
Species Flock ◽  
Domestic Duck ◽  
Gut Microbes ◽  
Foraging Site ◽  
Grus Monacha

Abstract Background The composition of intestinal microflora in animals is affected by cross-species transmission. In a nature reserve, the foraging sites of waterbirds are relatively fixed, but frequently close to residential areas and can also be visited by domestic fowls. It is easy to result in the trans-species-flock dispersal of gut microbes between the wild birds and domestic fowls. The effects of the variable foraging site distances on the gut microbe structures of the waterbirds and the sympatric domestic fowls are currently unclear, and further research is required to evaluate the impacts of geographic location on cross-infection. Methods Illumina high-throughput sequencing and bioinformatics analysis software were utilized to compare and analyze the composition of gut microbes from the fecal samples of Hooded Cranes (HC; Grus monacha) and two groups of Domestic Ducks (Anas platyrhynchos domesticus) that foraged at 1 km (ducks in near areas, D-N), and 4 km (ducks in far areas, D-F) away from the habitats of the Hooded Cranes at Shengjin Lake, China. Results The results showed that there were significant differences in the alpha-diversity of the gut bacteria in the HC, D-N, and D-F samples under the interspecific distance factor. The dominant bacterial phyla, Cyanobacteria and Proteobacteria, showed correlations with distance for each host. The D-N group had more diverse intestinal flora than the D-F, as they were physically closer to the HC and had more indirect contact and cross-transmission of their gut microbes. More potentially pathogenic bacterial sequences, and Operational Taxonomic Units (OTUs) were found in the D-N than in HC and D-F. Conclusions Hooded Cranes and the Domestic Duck populations at variable distances from the cranes showed significant differences in their intestinal bacteria and potentially pathogenic bacteria. The closer the foraging sites were, the easier the intestinal flora spread across species. The results provide a basis for determining the safe distance between wild birds and domestic fowls in a nature reserve.

scholarly journals Types of bacteria isolated from Yemeni Currencies in Sana'a City and potential risk factors

2021 ◽  
Vol 9 (3) ◽  
pp. 042-047
Author(s):  
Rowa Mohammed Assayaghi ◽  
Huda Zaid AlShami ◽  
Arwa Mohammed Othman ◽  
Aied Mohammed Alabsi ◽  
Bassam Ahmad Aldokhaini
Keyword(s):  
Risk Factors ◽  
Potential Risk ◽  
Pathogenic Bacteria ◽  
Gram Positive ◽  
Serological Tests ◽  
Gram Negative ◽  
Bacterial Contaminants ◽  
Paper Currency ◽  
Shigella Spp ◽  
Potential Risk Factors

The main objective of this study was to determine the prevalence of bacterial contaminants on Yemeni paper currency notes and coins and some potential risk factors. This study was carried out on 140 paper currency and coins obtained from bus drivers, supermarket cashers and Qat sellers shops in Sana'a city, Yemen. Swabs were taken from 140 paper currencies and coins and were cultured on Blood and MacConkey agars. Gram stain, biochemical and serological tests were done to identify isolated bacteria. The percentage of different types of bacteria isolated from the currencies were as follow; Staphylococci spp (22.2%), Alcaligenes spp (11.2%) , Pseudomonas aeruginosa and, Gram positive bacilli (10.0%), Escherishia coli (9.3%) , Seratia marcescans (6.8 %) , Streptococci spp (5.3%) , Enterobacter aerogene (3.0%) , Klebsilla pneumoniae (3.0%) , Enterobacter cloacae (2.3%) , Yersinia enterocolitica (2.3%) , Citrobacter spp (2.3%) , Gram posative diplococci (1.5%) , Shigella spp (1.5%) , and same percentage (0.8%) of Gram negative cocci, Vibrio cholerae, Actinomysis spp, Proteus vulgaris, Proteus mirabilis. The highest percentage of Gram negative and Gram positive bacteria was found on currencies taken from supermarket cashers (31.4%) and (30.4), respectively. Whereas, lowest percentage were found in currencies taken from bus driver and Qat seller shops. Yemeni paper currency and coins are contaminated with pathogenic bacteria. Currency contamination is of importance issue to public health as it can provide a vehicle for easy transmission of pathogens between handlers. Therefore, public education on proper handling and great care should be taken during handling of money to avoid cross contamination.

scholarly journals The effectiveness of common methods of cold-holding on the temperature of milk

2017 ◽  
Vol 60 (4) ◽  
pp. 98-103
Author(s):  
Marissa Perrella ◽  
Richard Meldrum ◽  
Melissa T. Moos ◽  
Ian Young
Keyword(s):  
Staphylococcus Aureus ◽  
Time Series ◽  
Stainless Steel ◽  
Time Series Analysis ◽  
Potential Risk ◽  
Pathogenic Bacteria ◽  
Primary Objective ◽  
Foodborne Illness ◽  
Series Analysis ◽  
Human Contamination

Keeping self-serve milk below 4 °C may become difficult for a food premise operator who relies on the use of insulated containers for several hours. Although milk sold in Canada is pasteurized, it may have the potential to cause illness if exposed to improper temperatures. The primary objective of this study was to demonstrate which product would be the most effective at keeping milk cold for the longest period to decrease the potential risk of foodborne illness. A survey was conducted in food premises throughout the Niagara region to determine which products were most commonly used for cold-holding milk, followed by a time-series analysis to investigate how rapidly the temperature of milk increased when stored in typical containers after 8 hours. Results showed that vacuum-insulated carafes are the most effective at cold-holding and stainless-steel carton holders are the least effective. The Niagara survey showed that 8 of 27 premises visited used these poorly insulated stainless-steel carton holders, which may be additionally susceptible to human contamination from potentially pathogenic bacteria such as Staphylococcus aureus due to their open spout.

scholarly journals Evaluation of the Human Interference on the Microbial Diversity of Poyang Lake Using High-Throughput Sequencing Analyses

2019 ◽  
Vol 16 (21) ◽  
pp. 4218
Author(s):  
Haiming Qin ◽  
Lanyue Cui ◽  
Xinyi Cao ◽  
Qian Lv ◽  
Tingtao Chen
Keyword(s):  
High Throughput ◽  
Human Activities ◽  
Anthropogenic Disturbance ◽  
Pathogenic Bacteria ◽  
High Throughput Sequencing ◽  
Nature Reserve ◽  
Poyang Lake ◽  
Jiangxi Province ◽  
Microbial Composition ◽  
National Nature Reserve

The Poyang Lake Watershed (PLW) is regarded as an air temperature moderator, as well as a wind energy, food resources and good habitat in the Jiangxi Province, People’s Republic of China. However, with the increasing of anthropogenic disturbance on PLW, there are few studies focused on the effects of human activities on microbial composition in Poyang Lake. In the present study, a high-throughput sequencing method was used to identify the microbial composition in water and sludge in Dahuchi (DHC, sub-lake of Poyang Lake National Nature Reserve), Shahu (SH, sub-lake of Poyang Lake National Nature Reserve), Nanhu (NH, sub-lake out of Poyang Lake National Nature Reserve), Zhelinhu (ZLH, artificial reservoir), Sixiahu (SXH, sub-lake artificially isolated from Poyang Lake) and Qianhu (QH, urban lake). Results of the present study illustrated the various bacterial diversity between different lakes, for example, at the phylum level, Actinobacteria and Cyanobacteria showed low abundance in water samples of ZLH and QH, and high abundance in DHC. In addition, anthropogenic disturbance and human activities decreased the abundance of probiotic bacteria (Actinobacteria, Cyanobacteria, Chloroflexi and Acidobacteria) and increased the abundance of pathogenic bacteria (Acinetobacter, Aeromonas and Noviherbaspirillum). The enrichment of pathogenic bacteria in polluted lakes, in turn, may cause potential threats to human health.

Probiotic Displaces Pathogenic Bacteria

2006 ◽  
Vol 37 (7) ◽  
pp. 48
Author(s):  
ERIK GOLDMAN
Keyword(s):  
Pathogenic Bacteria

Iron and Malaria: Absorption, Efficacy and Safety

2010 ◽  
Vol 80 (45) ◽  
pp. 279-292 ◽  
Author(s):  
Richard Hurrell
Keyword(s):  
Pathogenic Bacteria ◽  
Intestinal Barrier ◽  
Systemic Circulation ◽  
Malarial Parasite ◽  
Asymptomatic Malaria ◽  
Iron Supplements ◽  
Fortified Food ◽  
Care Giving ◽  
Single Meal ◽  
Women And Children

Febrile malaria and asymptomatic malaria parasitemia substantially decrease iron absorption in single-meal, stable isotope studies in women and children, but to date there is no evidence of decreased efficacy of iron-fortified foods in malaria-endemic regions. Without inadequate malarial surveillance or health care, giving iron supplements to children in areas of high transmission could increase morbidity and mortality. The most likely explanation is the appearance of non-transferrin-bound iron (NTBI) in the plasma. NTBI forms when the rate of iron influx into the plasma exceeds the rate of iron binding to transferrin. Two studies in women have reported substantially increased NTBI with the ingestion of iron supplements. Our studies confirm this, but found no significant increase in NTBI on consumption of iron-fortified food. It seems likely that the malarial parasite in hepatocytes can utilize NTBI, but it cannot do so in infected erythrocytes. NTBI however may increase the sequestration of parasite-infected erythrocytes in capillaries. Bacteremia is common in children with severe malaria and sequestration in villi capillaries could lead to a breaching of the intestinal barrier, allowing the passage of pathogenic bacteria into the systemic circulation. This is especially important as frequent high iron doses increase the number of pathogens in the intestine at the expense of the barrier bacteria.

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