Legionella

Percival, Steven L.; Williams, David Wynne

doi:10.1016/b978-0-12-415846-7.00008-1

Cited by 10 publications

(3 citation statements)

References 78 publications

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“…Species replacement, induced by climate related environmental change, resulted in a gradually replacement of cold-tolerant microbes with warm-affinity ones ( Figure 8 ; Supplementary Figures S1, S2 ). The relative abundance of bacteria growing optimally above 30°C increased ( Figure 8 ; Pagnier et al, 2010 ; Falagán and Johnson, 2014 ; Percival and Williams, 2014 ), and the indicator species in VS can survive in environments where water is extremely scarce ( Huber and Overmann, 2018 ; Wang K. et al, 2022 ). The consistent increases in warm-affinity taxa along species replacement reflected a high tolerance for drought and heat stress of V .…”

Section: Discussionmentioning

confidence: 99%

Microbial gradual shifts during the process of species replacement in Taihang Mountain

et al. 2023

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IntroductionUnderstanding microbial gradual shifts along species replacement can help elucidate the mechanisms driving secondary succession, and predict microbial responses to changing environments. However, how climate-induced species replacement alters microbial processes, and whether microbial shifts follow predictable assembly trajectories remain unclear.MethodsUsing space-for-time substitution approach, we studied shifts in bacterial and fungal communities in the succession from Leptodermis oblonga to Vitex negundo var. heterophylla shrubland in Taihang Mountain.Results and DiscussionSpecies replacement, induced by climate related environmental change, significantly increased the above-ground biomass of shrublands, and TP and TK contents in topsoil. The succession from L. oblonga to V. negundo var. heterophylla communities resulted in the gradually replacement of cold-tolerant microbes with warm-affinity ones, and alterations of microbial communities involved in soil biogeochemical processes. Soil and plant variables, such as above-ground biomass, soil pH, total phosphorus, and total potassium, well explained the variations in microbial communities, indicating that the coordinated changes in plant communities and soil properties during secondary succession caused accompanied shifts in microbial diversity and composition.

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Section: Discussionmentioning

confidence: 99%

Microbial gradual shifts during the process of species replacement in Taihang Mountain

et al. 2023

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“…The majority of toxins are produced naturally by species of marine harmful algal blooms (mHABs), with others associated with bacteria [76]. Cyanobacterial harmful algal blooms (CHABs) are distributed widely, most notably in freshwater [77], posing a substantial threat to both drinking and recreational water. The natural function of aquatic toxins is unclear and research has primarily focused on the impacts these compounds have on humans.…”

Section: Aquatic Food and Water Safetymentioning

confidence: 99%

Friends or Foes? Emerging Impacts of Biological Toxins

Clark

Casewell

Elliott

et al. 2019

Trends in Biochemical Sciences

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Toxins are substances produced from biological sources (e.g., animal, plants, microorganisms) that have deleterious effects on a living organism. Despite the obvious health concerns of being exposed to toxins, they are having substantial positive impacts in a number of industrial sectors. Several toxin-derived products are approved for clinical, veterinary, or agrochemical uses. This review sets out the case for toxins as 'friends' that are providing the basis of novel medicines, insecticides, and even nucleic acid sequencing technologies. We also discuss emerging toxins ('foes') that are becoming increasingly prevalent in a range of contexts through climate change and the globalisation of food supply chains and that ultimately pose a risk to health. Toxins and Toxinology In the natural world, toxins are employed for diverse purposes, from the prey-incapacitating molecules found in snake, spider, and cone snail venom, to the defensive compounds harboured by numerous poisonous plant and animal species. While the consequences of human intoxication can be severe (Box 1), the functional diversity of biological toxins has led to their frequent use as experimental tools for studying physiological and pharmacological mechanisms (e.g., synaptic transmission, ion channel subtypes) (Figure 1). Toxinology involves the identification, characterisation, production, and engineering of biological toxins along with their application or repurposing as research tools and clinical products. As such, toxinology encompasses the study of the evolution, chemistry, biology, and clinical effects of toxins and includes potential biotechnological and/or therapeutic applications. Experimental applications of toxins as tools for physiologists go back a long time, including Claude Bernard's experiments in the 1800s with curare to demonstrate the existence of chemical signalling between nerves and muscles [2], and Henry Dale's use of muscarine and nicotine to show different subtypes of receptors for acetylcholine [3]. Snake toxins were critical for the first isolation of a receptor for a neurotransmitter [a-bungarotoxin and nicotinic acetylcholine receptors (nAChRs)] [4]. Recently, peptide toxins have been very useful in teasing out the functional importance of different subtypes of ion channels that are critical for neuronal function and cellular signalling [5-7]. An increasing number of toxins are now transitioning from the laboratory to the clinic and the balance of research in this aspect of toxinology is shifting from the classical development of anti-toxins and anti-venoms towards drug discovery [8,9]. The attraction of toxins for drug discovery lies in their often unique selectivity of their biological effects coupled with high potency. Toxic plant alkaloids were the first source of toxin-derived therapeutics, notably

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“…are gram-negative bacteria and short rod-shaped cells. The major representative species of the genus is Legionella pneumophila that can cause the Legionellosis [1]. Legionellae are commonly found in natural water environments (e.g., rivers, lakes, lagoon and reservoirs) and human-made water systems (e.g., cooling tower, water heater tanks, fountain and spa pools).…”

Section: Introductionmentioning

confidence: 99%

Detection of Legionella spp. and Other Pathogens in Water Systems of Nursing Homes and Spa Pools

Tanyaporn¹

2017

May 22-24, 2017 Kuala Lumpur (Malaysia) ICLTET-2017, ACBES-2017

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Legionella spp. are gram-negative and non-sporeforming bacteria. The Legionella infections are caused by the contaminated aerosols from the water distribution systems. The objectives of this study were to detect Legionella spp. and other bacterial pathogens in water systems of nursing homes and spa pools and to determine the relationship between water parameters and the prevalence of Legionella spp. The water samples were collected from nursing homes and spa pools and examined for the presence of Legionella spp. and other bacterial pathogens by culture methods. Legionella spp. was found in the water systems; 6 from 30 (20%) of nursing homes and 13 from 30 (43.33%) of spa pools. Other bacterial pathogens were Pseudomonas spp., Enterobacter spp., Acenetobacter spp. and Citrobacter spp.. There were no statistical significant correlation between water parameters (pH and temperature) and Legionella detection.

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Legionella

Cited by 10 publications

References 78 publications

Microbial gradual shifts during the process of species replacement in Taihang Mountain

Microbial gradual shifts during the process of species replacement in Taihang Mountain

Friends or Foes? Emerging Impacts of Biological Toxins

Detection of Legionella spp. and Other Pathogens in Water Systems of Nursing Homes and Spa Pools

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