I-T raids on close aides of two more Congress MLA candidates

Mangaluru, Apr 6: City Police Commissioner Dr P S Harsha has directed coastal security personnel to block the boat service near Talapady after reports of Kasarogod people using boats to cross over to Dakshina Kannada via Talapady river emerged, Dakshina Kannada District in-charge Minister Kota Srinivas Poojary said here on Monday.

Following the rise in Coronavirus cases in the neighbouring Kasargod district, District Commissioner Sindhu Roopesh ordered closure of borders with Kerala and totally suspended vehicular movement, including for medical emergencies.

However, now the people living in Talapady and surrounding areas allege that the government has failed to monitor people using boats to cross over to Dakshina Kannada via Talapady river.

Bengaluru, May 14: As many as 22 new cases have been reported in Karnataka taking the total number of positive cases in the state to 981. 

The new cases include five in Bengaluru Urban - all with a contact history, four each in Gadag - with history of travel to Ahemadabad, Mandya with travel history to Mumbai, Maharashtra and Bidar - with three from containment zone and one with travel history to Mumbai, three from Davangere and one each from Belagavi and Bagalkote.

Meanwhile, two more deaths have been reported in the state on Thursday morning taking the total toll to 35. This is apart from a non-COVID-19 death.

An 80-year-old resident of Dakshina Kannada, got admitted at private hospital following a stroke. She was shifted to the icu on confirmation for Covid-19 at a designated hospital on April 26. She died on Thursday due to septic shock.

Another 60-year-old male, resident of Ananthapur in Andhra Pradesh, admitted at Victoria Hospital in Bengaluru with severe pneumonia and respiratory distress died due to cardiac arrest on Thursday morning. He had hypotension and Diabetes Mellitus, according to the morning health bulletin.

Sources in Victoria Hospital said this person was the first patient to undergo clinical trial for plasma therapy. He was infused plasma on Monday. However, his condition continued to remain the same.

London, May 20: The current physical distancing guidelines of 6 feet may be insufficient to prevent COVID-19 transmission, according to a study which says a mild cough in low wind speeds can propel saliva droplets by as much as 18 feet.

Researchers, including those from the University of Nicosia in Cyprus, said a good baseline for studying the airborne transmission of viruses, like the one behind the COVID-19 pandemic, is a deeper understanding of how particles travel through the air when people cough.

In the study, published in the journal Physics of Fluids, they said even with a slight breeze of about four kilometres per hour (kph), saliva travels 18 feet in 5 seconds.

"The droplet cloud will affect both adults and children of different heights," said study co-author Dimitris Drikakis from the University of Nicosia.

According to the scientists, shorter adults and children could be at higher risk if they are located within the trajectory of the saliva droplets.

They said saliva is a complex fluid, which travels suspended in a bulk of surrounding air released by a cough, adding that many factors affect how saliva droplets travel in the air.

These factors, the study noted, include the size and number of droplets, how they interact with one another and the surrounding air as they disperse and evaporate, how heat and mass are transferred, and the humidity and temperature of the surrounding air.

In the study, the scientists created a computer simulation to examine the state of every saliva droplet moving through the air in front of a coughing person.

The model considered the effects of humidity, dispersion force, interactions of molecules of saliva and air, and how the droplets change from liquid to vapour and evaporate, along with a grid representing the space in front of a coughing person.

Each grid, the scientists said, holds information about variables like pressure, fluid velocity, temperature, droplet mass, and droplet position.

The study analysed the fates of nearly 1,008 simulated saliva droplets, and solved as many as 3.7 million equations.

"The purpose of the mathematical modelling and simulation is to take into account all the real coupling or interaction mechanisms that may take place between the main bulk fluid flow and the saliva droplets, and between the saliva droplets themselves," explained Talib Dbouk, another co-author of the study.

However, the researchers added that further studies are needed to determine the effect of ground surface temperature on the behaviour of saliva in air.

They also believe that indoor environments, especially ones with air conditioning, may significantly affect the particle movement through air.

This work is important since it concerns safety distance guidelines, and advances the understanding of the transmission of airborne diseases, Drikakis said.