Sniffer dogs detect COVID-19 infections with 94 percent accu
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A group of researchers at the University of Veterinary Medicine Hannover, Germany, claim that dogs can sniff out coronavirus patients in a crowd with high precision, according to a study published in journal BMC Infectious Diseases.

Findings of the study:

• Researchers trained eight dogs for one week to identify the saliva and or respiratory secretions of confirmed COVID-19 patients.

• Atotal of 1,012 samples were randomised and presented to the dogs. The samples were put along with known negative samples in such a way that the dog is not directly exposed to it but can sniff it out through a grid.

• Out of these, the dogs had an average detection rate of 94 percent with 157 positives, 792 negatives, 33 false positives and 30 false negatives. The testing specificity was 96.34 percent and sensitivity was 82.63 percent.

• Test sensitivity refers to the ability to correctly identify true positives and specificity refers to the ability to correctly identify true negatives. As per the study, an RT-PCR has a false positive rate of 2.3-6.9 percent.

It is suggested that in all of these conditions, the infectious microbe or the human body produces certain substances that a dog can sniff out and can be trained to recognise.

The olfactory sense of a dog is said to be about 10,000 to 100,000 times stronger than humans. They are also shown to be able to detect various diseases including cancer, malaria, and various kinds of bacterial and viral infections.

However, more studies are needed before dogs can be considered to find COVID-19 positive people in crowds.

Source: https://bmcinfectdis.biomedcentral.com/articles/10.1186/s12879-020-05281-3
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Dr. R S●●●●●h K●●●r K●●●r Urology
Is any sniffer dog trained is affected with Covid at the end of training
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Dr. R●●●●h b●●u General Medicine
Nature is great
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