Mangaluru: Over 1500 students, teacehrs to take part in ABVP state conference

Mangaluru, Mar 27: A youth from Dakshina Kannada district, who had returned from United Arab Emirates earlier this month has tested positive for the deadly Covid-19 caused by the novel coronavirus. With this the total of Covid-19 in the district has mounted to seven. 

The fresh Covid-19 patient is a 21-year-old youth hailing from Karaya in Belthangady taluk. 

He had left Dubai on March 21 and land at Bengaluru Airport. Then he reached Belthangady through a KSRTC bus the very next morning. 

As he was suffering from fever and cough, he was admitted to Puttur government hospital on March 24. Same day his throat swab sample was sent for coronavirus testing. Today it was declared positive. 

His condition is said to be stable. However, his family members and those who were in touch with him are under observation.

Bengaluru, May 22: Karnataka reported 138 fresh cases of coronavirus on Friday, taking the state tally to 1743.

26 patients have been discharged on Friday and in total, 597 people have been discharged in Karnataka while total number of active cases in the state is 1,100. 41 people have succumbed to the virus, informed the state health department.

Out of the 138 cases, 111 are returnees from Maharashtra.Out of the 138 cases, 47 are from Chikkaballapura alone, 10 cases from Raichur eight cases each from Bidar and Mandya, five cases each from Bengaluru Rural and Bengaluru Urban, and 14 are from Hassan.

From Bengaluru Rural, three patients are returnees from Maharashtra. A fifty-five year old female from Bengaluru Rural, has contracted the virus and has been diagnosed with a history of SARI. She is currently under observation at a designated city hospital.

Five patients have tested positive from Bengaluru Urban. A 42-year-old woman tested positive in Bengaluru Urban and has been diagnosed with a history of Influenza-like Illness (ILI). She is currently under observation at a designated city hospital.

Two men, who have tested positive from Dharwad are returnees from Delhi. Both of them are currently under observation at a designated hospital in Hubli. A seventy-five year old male who has contracted the coronavirus has returned from Jharkhand.

The current physical distancing guidelines provided by the World Health Organisation (WHO) and by the US Centers for Disease Control and Prevention (CDC) may not be adequate to curb the coronavirus spread, according to a research which says the gas cloud from a cough or sneeze may help virus particles travel up to 8 metres. The research, published in the Journal of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.

Study author, MIT associate professor Lydia Bourouiba, warned that droplets of all sizes can travel 23 to 27 feet, or 7-8 metres, carrying the pathogen.

According to Bourouiba, the current guidelines are based on "arbitrary" assumptions of droplet size, "overly simplified", and "may limit the effectiveness of the proposed interventions" against the deadly pandemic.

 She explained that the old guidelines assume droplets to be one of two categories, small or large, taking short-range semi-ballistic trajectories when a person exhales, coughs, or sneezes.

However based on more recent discoveries, the MIT scientist said, sneezes and coughs are made of a puff cloud that carries ambient air, transporting within it clusters of droplets of a wide range of sizes.

Bourouiba warned that this puff cloud, with ambient air entrapped in it, can offer the droplets moisture and warmth that can prevent it from evaporation in the outer environment.

"The locally moist and warm atmosphere within the turbulent gas cloud allows the contained droplets to evade evaporation for much longer than occurs with isolated droplets," she said.

"Under these conditions, the lifetime of a droplet could be considerably extended by a factor of up to 1000, from a fraction of a second to minutes," the researcher explained in the study.

The MIT scientist, who has researched the dynamics of coughs and sneezes for years, added that these droplets settle along the trajectory of a cough or sneeze contaminating surfaces, with their residues staying suspended in the air for hours.

"Even when maximum containment policies were enforced, the rapid international spread of COVID-19 suggests that using arbitrary droplet size cutoffs may not accurately reflect what actually occurs with respiratory emissions, possibly contributing to the ineffectiveness of some procedures used to limit the spread of respiratory disease," Bourouiba wrote in the study