As Modi-Bibi hang out, Kerala CM calls Israel a terrorist state

Mysuru, Apr 7 Following a tiger at Bronx Zoo in the US, testing positive for COVID-19, Mysuru Zoo authorities here have taken measures to contain the spread of the dreaded disease as per the directions of the Central Zoo Authority (CZA).

The Zoo is on alert and the animal keepers are not allowed to enter the enclosures without safety gear. It is mandatory for the personnel to undergo thermal screening before entering the Zoo. The personnel are provided with safety gears such as masks, gloves and Sanitisers. The CZA has directed to spray disinfectants near the enclosures of the animals and has also directed to monitor the animals’ behavior.

Zoo Authority of Karnataka Member Secretary B P Ravi said, "COVID-19 was detected in a domestic cat two weeks back in Hong Kong. Due to the outbreak of bird flu in Mysuru, we have taken all precautionary measures to combat COVID-19."

Bengaluru, Apr 6: Karnataka State Board for Auqaf on Monday suspended mass prayers and visit to the Qabrasthans (graveyards) and dargahs on the occasion of Shab-e-Barat on April 9 due to the coronavirus pandemic.

"It is hereby directed to all not to hold congregational prayer in the Masjid and the management of the Qabrasthans/Dargahs throughout the State should suspend the visit of public on the occasion of Shab-e-Barat on Thursday, April 9," according to a statement here on Monday.

It said, no public shall be allowed to perform religious rituals in the Qabrasthans/Dargahs and all the gates shall be kept closed.

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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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