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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."

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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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

Mangaluru/Udupi, Jul 26: Karnataka’s twin coastal districts of Dakshina Kannada and Udupi have recorded 369 new coronavirus positive cases and 10 more deaths related to the covid-19 in past 24 hours. 

Dakshina Kannada

With 199 new covid-19 cases, DK’s covid toll mounted to 4,811. The district also recorded eight new covid-related deaths. The death toll mounted to 123. 

Among the 199 new cases are 31 primary contacts, 73 with influenza-like illness (ILI), and 10 with severe acute respiratory illness (SARI). As many as 83 cases are under investigation. Two of the patients have international travel history.

Eight deaths:

A 71-year-old man from Mangaluru, who was admitted to a private hospital on July 19, passed away on July 23. He was diagnosed with ARDS/multiorgan dysfunction, chronic renal disease, diabetes, and hypertension. His throat swabs tested positive for covid-19. 

A 70-year-old man from Mangaluru, who was admitted to a private hospital on July 20, passed away on July 24. He had developed sepsis, chronic kidney disease, lower respiratory tract infection, and other ailments. 

A 55-year-old man from Puttur was admitted to a private hospital on July 23, and passed away a day later. He was diagnosed with septic shock with acute kidney injury with severe metaboic acidosis. 

A 56-year-old man from Mangaluru who was admitted to a private hospital on July 20 passed away on July 24. He was suffering from acute respiratory distress syndrome, multi-organ dysfunction syndrome and ischemic heart disease.

A 72-year-old man from Mangaluru who was admitted to a private hospital on July 18 passed away on July 24. He was suffering from refractory hypoxemia/refractory ARDS, septic shock, secondary bacterial infection, renal failure, acute coronary event, and other ailments. 

A 45-year-old woman from Mangaluru who was admitted to a private hospital on July 24 passed away the same day. She had been diagnosed with metastatic carcinoma of right lung and pneumonia. 

A 55-year-old man from Mangaluru who was admitted to a private hospital on July 21 and passed away on July 24. As per the district bulletin, he was suffering from refractory hypoxemia/refractory ARDS, septic shock, secondary bacterial infection, renal failure, acute coronary event, and other ailments.

A 70-year-old man from Mangaluru suffering from severe pneumonia with ARDS, multiorgan dysfunction, sepsis, chronic kidney disease and hypothyroidism was admitted to a private hospital on July 24 and passed away the same day.

Though the above patients contracted coronavirus, the exact cause of their deaths is being investigated by a team of experts and their report is awaited.

Udupi

The district recorded 170 new covid-19 cases and the total confirmed cases mounted to 3,388. Among the new cases, 86 are in Udupi, 31 in Kundapur, and 52 in Karkala. They include 106 male and 63 women. As many as 2,133 patients have been discharged so far, and 1,241 cases are currently active. 

The district also recorded two covid-19 related deaths – a woman and a man. One is a 63-year-old resident of Byndoor and the other is from Udupi's Indiranagar area. Both had been admitted to the ICU of a private hospital. 

Byndoor resident passed away on the night of Saturday July 26, the Udupi resident died on Sunday. The last rites of both the deceased were conducted as per protocol.