Using trained dogs and organic semi-conducting sensors to identify asymptomatic and mild SARS-CoV-2 infections: an observational study.

Background: A rapid, accurate, non-invasive diagnostic screen is needed to identify people with SARS-CoV-2 infection. We investigated whether organic semi-conducting (OSC) sensors and trained dogs could distinguish between people infected with asymptomatic or mild symptoms, and uninfected individuals, and the impact of screening at ports-of-entry.

Methods: Odour samples were collected from adults, and SARS-CoV-2 infection status confirmed using RT-PCR.

Omasal and abomasal impaction in beef suckler cows.

A group of late gestation suckler cows were housed in straw yards and had been fed solely on pea haulm for the previous three weeks. Four cows became ill, with a variety of clinical signs, two died, one was euthanased and one recovered spontaneously. Postmortem examination revealed severe omasal and abomasal impaction.