Category Archives: Water

Europe – Legionnaires’ disease – Annual Epidemiological Report for 2017

ECDC

Publication series: Annual Epidemiological Report on Communicable Diseases in Europe
Time period covered: This report is based on data for 2017 retrieved from The European Surveillance System (TESSy) on 13 July 2018.

Europe -Cryptosporidiosis – Annual Epidemiological Report for 2016

ECDC

Publication series: Annual Epidemiological Report on Communicable Diseases in Europe

Time period covered: This report is based on data for 2016 retrieved from The European Surveillance System (TESSy) on 15 March 2018. 

USA – Illinois: Another Legionnaires’ disease cluster reported

Outbreak News Today

 

legionellacIn a follow-up to the recent Legionnaires’ disease clusters in Illinois, state and county health officials are investigating a cluster of three cases at McHenry Villa, an independent senior living community.

Public health officials confirmed the third case this week. McHenry Villa is notifying residents, the residents’ identified contact, and staff.  All three cases had outside exposures, and two of the cases had potential exposures at Centegra Hospital-McHenry.  Public health officials will continue to investigate any other potential sources.

Information – How Many Legionella Species Exist & Which Ones Cause Legionnaires’ Disease?

Legionella Control Legionella A

While there are more than 50 different recognised Legionella species, less than half of those can cause illness in humans. However, while around 20 species are known to be harmful to us, just one has been identified as the cause of most outbreaks of Legionnaires’ disease. Read further at the link above.

Information – How Temperature Influences Legionella Growth

Legionella Control Legionella_Plate_01

In this review the experts at Legionella Control International look at how water temperatures influence legionella growth and how this information can be used to control the risks from the bacteria.

Under certain circumstances Legionella bacteria can lead to serious illness and fatalities in humans. Since Legionella bacteria can exist in man-made water systems, it is imperative to ensure the water is stored, maintained and distributed at temperatures that do not encourage the growth and spread of the bacteria.

There are three temperature ranges that have an influence on the growth and proliferation of Legionella bacteria. Read at the link below.

USA – Flooding from Hurricane Michael creates food safety issues across South

Food Safety News

Strong winds and heavy rain continue to wreak havoc across parts of the South today as Hurricane Michael meanders out of Georgia and heads up the mid-Atlantic Coast.

In addition to the devastating damage that is immediately visible today, less obvious hazards in the wake of the massive storm are expected to last weeks. Food safety dangers come in various forms and can cause severe illnesses and deaths as floodwaters recede.

Among the most vulnerable foods are fresh fruits and vegetables. They are breeding grounds for pathogens when power outages cause the loss of refrigeration and temperature control. Fresh produce that comes into contact with floodwater can be instantly contaminated with a wide range of bacteria, viruses and parasites.

The toxic composition of floodwater is such a serious food safety hazard that federal law prohibits the sale, distribution or donation of any produce or other food crops from fields that are flooded. Special inspections are required before such crops can even be used for animal feed. 

USA Today

Hurricane Michael leaves behind a treacherous, dangerous landscape that will likely pose risks to human health for weeks to come, experts say.

The water itself can carry bacteria and viruses that pose a major health hazard.

Among the medical dangers are cholera, Hepatitis A and vibriosis, said Dr. Robert Glatter, an emergency room physician at Lenox Hill Hospital in New York City. Glatter said storm victims need to stay focused on staying healthy while they await recovery efforts. That may mean not rushing outside as soon as the skies clear.

“Don’t panic— try to take things one step at a time when you feel overwhelmed,” he said.

Research – Cinnamaldehyde disrupts biofilm formation and swarming motility of Pseudomonas aeruginosa

Microbiology Research

Bacterial biofilms can cause serious health care complications associated with increased morbidity and mortality. There is an urge to discover and develop new biofilm inhibitors from natural products or by modifying natural compounds or understanding the modes of action of existing compounds. Cinnamaldehyde (CAD), one of the major components of cinnamon oil, has been demonstrated to act as an antimicrobial agent against a number of Gram-negative and Gram-positive pathogens, including Pseudomonas aeruginosa, Helicobacter pylori and Listeria monocytogenes. Despite the mechanism of action of CAD against the model organism P. aeruginosa being undefined, based on its antimicrobial properties, we hypothesized that it may disrupt preformed biofilms of P. aeruginosa. The minimum inhibitory concentration (MIC) of CAD for planktonic P. aeruginosa was determined to be 11.8 mM. Membrane depolarization assays demonstrated disruption of the transmembrane potential of P. aeruginosa. CAD at 5.9 mM (0.5 MIC) disrupted preformed biofilms by 75.6 % and 3 mM CAD (0.25 MIC) reduced the intracellular concentrations of the secondary messenger, bis-(3′–5′)-cyclic dimeric guanosine monophosphate (c-di-GMP), which controls P. aeruginosa biofilm formation. The swarming motility of P. aeruginosa was also reduced by CAD in a concentration-dependent manner. Collectively, these findings show that sub-MICs of CAD can disrupt biofilms and other surface colonization phenotypes through the modulation of intracellular signalling processes.