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Legionnaires disease

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https://www.readbyqxmd.com/read/28724206/vital-signs-health-care-associated-legionnaires-disease-surveillance-data-from-20-states-and-a-large-metropolitan-area-united-states-2015
#1
EDITORIAL
E A Soda, A E Barskey, P P Shah, S Schrag, C G Whitney, M J Arduino, S C Reddy, J M Kunz, C M Hunter, B H Raphael, L A Cooley
BACKGROUND: Legionnaires' disease, a severe pneumonia, is typically acquired through inhalation of aerosolized water containing Legionella bacteria. Legionella can grow in the complex water systems of buildings, including health care facilities. Effective water management programs could prevent the growth of Legionella in building water systems. METHODS: Using national surveillance data, Legionnaires' disease cases were characterized from the 21 jurisdictions (20 U...
August 2017: American Journal of Transplantation
https://www.readbyqxmd.com/read/28703097/legionnaires-disease-in-europe-2011-to-2015
#2
Julien Beauté
Under the coordination of the European Centre for Disease Prevention and Control (ECDC), the European Legionnaires' disease Surveillance Network (ELDSNet) conducts surveillance of Legionnaires' disease (LD) in Europe. Between 2011 and 2015, 29 countries reported 30,532 LD cases to ECDC (28,188 (92.3%) confirmed and 2,344 (7.7%) probable). Four countries (France, Germany, Italy and Spain) accounted for 70.3% of all reported cases, although their combined populations represented only 49.9% of the study population...
July 6, 2017: Euro Surveillance: Bulletin Européen sur les Maladies Transmissibles, European Communicable Disease Bulletin
https://www.readbyqxmd.com/read/28696077/legionnaires-disease-in-transplant-recipients-a-15-year-retrospective-study-in-a-tertiary-referral-center
#3
Shobini Sivagnanam, Sara Podczervinski, Susan M Butler-Wu, Vivian Hawkins, Zach Stednick, Lois A Helbert, William A Glover, Estella Whimbey, Jeffrey Duchin, Guang-Shing Cheng, Steven A Pergam
Legionnaires' disease (LD) can be fatal among high-risk transplant recipients. To understand the epidemiology of LD, we reviewed 15-year, longitudinal data from a center in Seattle, Washington that cares for both solid organ transplant (SOT) and hematopoietic cell transplant (HCT) recipients. We identified all laboratory-confirmed LD and extracted data on species, diagnostic modalities, clinical presentation, management, and outcomes from medical records. Among 32 patients with LD, transplant recipients made up the majority of diagnoses (22, 69%; SOT 10, HCT 12)...
July 11, 2017: Transplant Infectious Disease: An Official Journal of the Transplantation Society
https://www.readbyqxmd.com/read/28689128/incubation-of-premise-plumbing-water-samples-on-buffered-charcoal-yeast-extract-agar-at-elevated-temperature-and-ph-selects-for-legionella-pneumophila
#4
Harm R Veenendaal, Anke J Brouwer-Hanzens, Dick van der Kooij
Worldwide, over 90% of the notified cases of Legionnaires' disease are caused by Legionella pneumophila. However, the standard culture medium for the detection of Legionella in environmental water samples, Buffered Charcoal Yeast Extract (BCYE) agar of pH 6.9 ± 0.4 with or without antimicrobial agents incubated at 36 ± 1 °C, supports the growth of a large diversity of Legionella species. BCYE agar of elevated pH or/and incubation at elevated temperature gave strongly reduced recoveries of most of 26 L...
June 27, 2017: Water Research
https://www.readbyqxmd.com/read/28671392/recreational-waterborne-illnesses-recognition-treatment-and-prevention
#5
Allen Perkins, Marirose Trimmier
Illness after recreational water activities can be caused by a variety of agents, including bacteria, viruses, parasites, algae, and even chlorine gas. These illnesses are more common in summer. Waterborne illnesses are underreported because most recreational activity occurs in unsupervised venues or on private property, and participants tend to disperse before illness occurs. Symptoms of waterborne illness are primarily gastrointestinal, but upper respiratory and skin manifestations also occur. Gastrointestinal symptoms are usually self-limited, and supportive treatment may be all that is necessary...
May 1, 2017: American Family Physician
https://www.readbyqxmd.com/read/28662761/genomic-investigation-of-a-suspected-outbreak-of-legionella-pneumophila-st82-reveals-undetected-heterogeneity-by-the-present-gold-standard-methods-denmark-july-to-november-2014
#6
Susanne Schjørring, Marc Stegger, Charlotte Kjelsø, Berit Lilje, Jette M Bangsborg, Randi F Petersen, Sophia David, Søren A Uldum
Between July and November 2014, 15 community-acquired cases of Legionnaires´ disease (LD), including four with Legionella pneumophila serogroup 1 sequence type (ST) 82, were diagnosed in Northern Zealand, Denmark. An outbreak was suspected. No ST82 isolates were found in environmental samples and no external source was established. Four putative-outbreak ST82 isolates were retrospectively subjected to whole genome sequencing (WGS) followed by phylogenetic analyses with epidemiologically unrelated ST82 sequences...
June 22, 2017: Euro Surveillance: Bulletin Européen sur les Maladies Transmissibles, European Communicable Disease Bulletin
https://www.readbyqxmd.com/read/28650958/dynamics-and-impact-of-homologous-recombination-on-the-evolution-of-legionella-pneumophila
#7
Sophia David, Leonor Sánchez-Busó, Simon R Harris, Pekka Marttinen, Christophe Rusniok, Carmen Buchrieser, Timothy G Harrison, Julian Parkhill
Legionella pneumophila is an environmental bacterium and the causative agent of Legionnaires' disease. Previous genomic studies have shown that recombination accounts for a high proportion (>96%) of diversity within several major disease-associated sequence types (STs) of L. pneumophila. This suggests that recombination represents a potentially important force shaping adaptation and virulence. Despite this, little is known about the biological effects of recombination in L. pneumophila, particularly with regards to homologous recombination (whereby genes are replaced with alternative allelic variants)...
June 2017: PLoS Genetics
https://www.readbyqxmd.com/read/28634242/type-ii-secretion-substrates-of-legionella-pneumophila-translocate-out-of-the-pathogen-occupied-vacuole-via-a-semipermeable-membrane
#8
Hilary K Truchan, Harry D Christman, Richard C White, Nakisha S Rutledge, Nicholas P Cianciotto
Legionella pneumophila replicates in macrophages in a host-derived phagosome, termed the Legionella-containing vacuole (LCV). While the translocation of type IV secretion (T4S) effectors into the macrophage cytosol is well established, the location of type II secretion (T2S) substrates in the infected host cell is unknown. Here, we show that the T2S substrate ProA, a metalloprotease, translocates into the cytosol of human macrophages, where it associates with the LCV membrane (LCVM). Translocation is detected as early as 10 h postinoculation (p...
June 20, 2017: MBio
https://www.readbyqxmd.com/read/28628460/risk-factors-for-legionella-longbeachae-legionnaires-disease-new-zealand
#9
Emma Kenagy, Patricia C Priest, Claire M Cameron, Debbie Smith, Pippa Scott, Vicki Cho, Peter Mitchell, David R Murdoch
Legionella longbeachae, found in soil and compost-derived products, is a globally underdiagnosed cause of Legionnaires' disease. We conducted a case-control study of L. longbeachae Legionnaires' disease in Canterbury, New Zealand. Case-patients were persons hospitalized with L. longbeachae pneumonia, and controls were persons randomly sampled from the electoral roll for the area served by the participating hospital. Among 31 cases and 172 controls, risk factors for Legionnaires' disease were chronic obstructive pulmonary disease, history of smoking >10 years, and exposure to compost or potting mix...
July 2017: Emerging Infectious Diseases
https://www.readbyqxmd.com/read/28625225/legionella-longbeachae-detected-in-an-industrial-cooling-tower-linked-to-a-legionellosis-outbreak-new-zealand-2015-possible-waterborne-transmission
#10
C N Thornley, D J Harte, R P Weir, L J Allen, K J Knightbridge, P R T Wood
A legionellosis outbreak at an industrial site was investigated to identify and control the source. Cases were identified from disease notifications, workplace illness records, and from clinicians. Cases were interviewed for symptoms and risk factors and tested for legionellosis. Implicated environmental sources were sampled and tested for legionella. We identified six cases with Legionnaires' disease and seven with Pontiac fever; all had been exposed to aerosols from the cooling towers on the site. Nine cases had evidence of infection with either Legionella pneumophila serogroup (sg) 1 or Legionella longbeachae sg1; these organisms were also isolated from the cooling towers...
June 19, 2017: Epidemiology and Infection
https://www.readbyqxmd.com/read/28622979/whole-genome-sequencing-for-identification-of-the-source-in-hospital-acquired-legionnaires-disease
#11
A M Rosendahl Madsen, A Holm, T G Jensen, E Knudsen, H Lundgaard, M N Skov, S A Uldum, M Kemp
Acquisition of Legionnaires' disease is a serious complication of hospitalization. Rapid determination of whether or not the infection is caused by strains of Legionella pneumophila in the hospital environment is crucial to avoid further cases. This study investigated the use of whole-genome sequencing to identify the source of infection in hospital-acquired Legionnaires' disease. Phylogenetic analyses showed close relatedness between one patient isolate and a strain found in hospital water, confirming suspicion of nosocomial infection...
April 27, 2017: Journal of Hospital Infection
https://www.readbyqxmd.com/read/28619815/complete-genome-sequence-of-a-legionella-longbeachae-serogroup-1-strain-isolated-from-a-patient-with-legionnaires-disease
#12
Sandy Slow, Trevor Anderson, James Miller, Siddharth Singh, David Murdoch, Patrick J Biggs
Legionella longbeachae serogroup 1, predominantly found in soil and composted plant material, causes the majority of cases of Legionnaires' disease (LD) in New Zealand. Here, we report the complete genome sequence of an L. longbeachae serogroup 1 (sg1) isolate derived from a patient hospitalized with LD in Christchurch, New Zealand.
June 15, 2017: Genome Announcements
https://www.readbyqxmd.com/read/28615983/legionnaires-disease-clinicoradiological-comparison-of-sporadic-versus-outbreak-cases
#13
Hafiz Rizwan Talib Hashmi, Lakshmi Saladi, Frances Petersen, Misbahuddin Khaja, Gilda Diaz-Fuentes
BACKGROUND: In 2015, New York City experienced the worst outbreak of Legionnaires' disease in the history of the city. We compare patients seen during the 2015 outbreak with sporadic cases of Legionella during the past 5 years. METHODS: We conducted a retrospective chart review of 90 patients with Legionnaires' disease, including sporadic cases of Legionella infection admitted from 2010 to 2015 (n = 55) and cases admitted during the 2015 outbreak (n = 35). RESULTS: We saw no significant differences between the 2 groups regarding demographics, smoking habits, alcohol intake, underlying medical disease, or residence type...
2017: Clinical Medicine Insights. Circulatory, Respiratory and Pulmonary Medicine
https://www.readbyqxmd.com/read/28598348/mortality-from-selected-diseases-that-can-be-transmitted-by-water-united-states-2003-2009
#14
J W Gargano, E A Adam, S A Collier, K E Fullerton, S J Feinman, M J Beach
Diseases spread by water are caused by fecal-oral, contact, inhalation, or other routes, resulting in illnesses affecting multiple body systems. We selected 13 pathogens or syndromes implicated in waterborne disease outbreaks or other well-documented waterborne transmission (acute otitis externa, Campylobacter, Cryptosporidium, Escherichia coli (E. coli), free-living ameba, Giardia, Hepatitis A virus, Legionella (Legionnaires' disease), nontuberculous mycobacteria (NTM), Pseudomonas-related pneumonia or septicemia, Salmonella, Shigella, and Vibrio)...
June 2017: Journal of Water and Health
https://www.readbyqxmd.com/read/28596545/rapid-on-site-monitoring-of-legionella-pneumophila-in-cooling-tower-water-using-a-portable-microfluidic-system
#15
Nobuyasu Yamaguchi, Yusuke Tokunaga, Satoko Goto, Yudai Fujii, Fumiya Banno, Akiko Edagawa
Legionnaires' disease, predominantly caused by the bacterium Legionella pneumophila, has increased in prevalence worldwide. The most common mode of transmission of Legionella is inhalation of contaminated aerosols, such as those generated by cooling towers. Simple, rapid and accurate methods to enumerate L. pneumophila are required to prevent the spread of this organism. Here, we applied a microfluidic device for on-chip fluorescent staining and semi-automated counting of L. pneumophila in cooling tower water...
June 8, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28594788/vital-signs-health-care-associated-legionnaires-disease-surveillance-data-from-20-states-and-a-large-metropolitan-area-united-states-2015
#16
Elizabeth A Soda, Albert E Barskey, Priti P Shah, Stephanie Schrag, Cynthia G Whitney, Matthew J Arduino, Sujan C Reddy, Jasen M Kunz, Candis M Hunter, Brian H Raphael, Laura A Cooley
BACKGROUND: Legionnaires' disease, a severe pneumonia, is typically acquired through inhalation of aerosolized water containing Legionella bacteria. Legionella can grow in the complex water systems of buildings, including health care facilities. Effective water management programs could prevent the growth of Legionella in building water systems. METHODS: Using national surveillance data, Legionnaires' disease cases were characterized from the 21 jurisdictions (20 U...
June 9, 2017: MMWR. Morbidity and Mortality Weekly Report
https://www.readbyqxmd.com/read/28594785/notes-from-the-field-two-cases-of-legionnaires-disease-in-newborns-after-water-births-arizona-2016
#17
Geoffrey Granseth, Rachana Bhattarai, Tammy Sylvester, Siru Prasai, Eugene Livar
No abstract text is available yet for this article.
June 9, 2017: MMWR. Morbidity and Mortality Weekly Report
https://www.readbyqxmd.com/read/28582852/human-anti-lipopolysaccharid-lps-antibodies-against-legionella-with-high-species-specificity
#18
Philipp Kuhn, Stefanie Thiem, Michael Steinert, Duncan Purvis, Veronika Lugmayr, Ulrich Treutlein, Lutz Plobner, Robert-Matthias Leiser, Michael Hust, Stefan Dübel
Legionella are Gram-negative bacteria that are ubiquitously present in natural and man-made water reservoirs. When humans inhale aerosolized water contaminated with Legionella, alveolar macrophages can be infected, which may lead to a life-threatening pneumonia called Legionnaires' disease. Due to the universal distribution of Legionella in water and their potential threat to human health, the Legionella concentration in water for human use must be strictly monitored, which is difficult since the standard detection still relies on lengthy cultivation and analysis of bacterial morphology...
May 8, 2017: Human Antibodies
https://www.readbyqxmd.com/read/28572318/complete-genome-sequences-of-two-geographically-distinct-legionella-micdadei-clinical-isolates
#19
Amy J Osborne, Bethany R Jose, Jasper Perry, Zoe Smeele, Jack Aitken, Paul P Gardner, Sandy Slow
Legionella is a highly diverse genus of intracellular bacterial pathogens that cause Legionnaire's disease (LD), an often severe form of pneumonia. Two L. micdadei sp. clinical isolates, obtained from patients hospitalized with LD from geographically distinct areas, were sequenced using PacBio SMRT cell technology, identifying incomplete phage regions, which may impact virulence.
June 1, 2017: Genome Announcements
https://www.readbyqxmd.com/read/28570695/molecular-basis-for-the-binding-and-modulation-of-v-atpase-by-a-bacterial-effector-protein
#20
Jianhua Zhao, Ksenia Beyrakhova, Yao Liu, Claudia P Alvarez, Stephanie A Bueler, Li Xu, Caishuang Xu, Michal T Boniecki, Voula Kanelis, Zhao-Qing Luo, Miroslaw Cygler, John L Rubinstein
Intracellular pathogenic bacteria evade the immune response by replicating within host cells. Legionella pneumophila, the causative agent of Legionnaires' Disease, makes use of numerous effector proteins to construct a niche supportive of its replication within phagocytic cells. The L. pneumophila effector SidK was identified in a screen for proteins that reduce the activity of the proton pumping vacuolar-type ATPases (V-ATPases) when expressed in the yeast Saccharomyces cerevisae. SidK is secreted by L. pneumophila in the early stages of infection and by binding to and inhibiting the V-ATPase, SidK reduces phagosomal acidification and promotes survival of the bacterium inside macrophages...
June 2017: PLoS Pathogens
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