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Mysuru, Feb 14: Citing the coronavirus scare prevalent in the city, hotel owners have urged the civic corporation to shut down roadside food vends, calling them a risk to public health.

A team of the city Hotel Owners Association, led by president C Narayanagowda and honorary secretary Ravindra Bhat, met mayor Tasneem Bano and MCC commissioner Gurudatta Hegde on Tuesday and urged them to implement the high court’s ban on street food vending.

In a statement issued on Thursday, the association said it had raised the poor hygiene at such joints amid the coronavirus threat and increasing incidence of chikungunya and malaria in the city. There is no check on the ingredients or water used and the cleanliness of the kitchens and cooking staff, they pointed out. Many of the joints operate near drains and public urinals and don’t have running water for washing or cleaning utensils, they said. Besides, the vends dump unsegregated garbage and compromise pedestrian safety by blocking pavements, they alleged.

“As this involves the livelihood of the vendors, I will take a decision after discussions with the commissioner and elected representatives,” the mayor said while pointing out that MCC had issued identity cards to the vendors after collecting details about them and their stalls. She said the health and education standing committees would also be consulted.

Commissioner Hegde said MCC was planning to move the vendors to designated hawking zones to ensure their livelihood was not affected. He explained that any drive to remove the vends was fraught with law and order problems. “False cases have been filed against MCC officers whenever they conducted drives against footpath food vendors in non-hawking zones. We will consult with the city police commissioner before taking any steps,” he said.

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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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