Forget rivers and dams; groundwater too reaching danger level in Mangaluru

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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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

Madikeri, Apr 5: Following the novel Coronavirus and imposition of Lockdown in the country and departure of the migrant labour force to their hometowns, the harvest of Pepper and post-harvest process of Coffee have taken a hit in Kodagu region of Karnataka.

In the Coffee land, most of the workers at these estates are primarily from north Karnataka and neighbouring districts, including Periyapatna and Hunsur taluks in Mysuru District. Local workers are also sourced for the job as the harvest area is large.

The Kodagu district which already faced severe natural calamity during the last two years now added with the COVID-19 outbreak and the subsequent Lockdown, many workers have returned to their home districts, barring a few who have been working in the plantations for many years and reside in the estates themselves.

Mangaluru, Jul 11: Deputy Commissioner Sindhu B Rupesh has set up an expert committee to look into the cause of deaths of covid patients in Dakshina Kannada.

The development comes after eight more fatalities including that of a CISF personnel attached to MRPL, were reported in the district on Friday.

The district has recorded 23 deaths since July 1 and 38 death cases have been reported in the district since April 19.

Of the 38 deaths, five were from outside the district. All the eight patients, who lost their battle to the virus in the district on Friday, were suffering from co-morbidities.

According to the govt bulletin on Covid-19 cases, comorbid conditions, like kidney failure, brain tumour, TB, pneumonia, liver damage, high BP, diabetes and others, were the main reasons behind the Covid-19 deaths reported in the district.