A team of researchers in the United States - at the American Kansas State University and the Agricultural Research Service - found that house flies can acquire and harbor the infectious corona virus for up to 24 hours after exposure, by adding that house flies can mechanically transmit the genomic RNA of Coronavirus, to the surrounding environment for up to 24 hours after exposure.
The study, published in the journal Parasites & Vectors, aimed to determine whether house flies could transmit the Corona virus.
House flies transmit bacterial, viral and parasitic diseases to both humans and animals as mechanical vectors, and they can carry more than 250 different pathogens.
The virus infects and multiplies in arthropod vectors and is transmitted to hosts during feeding in biological transmission, and during mechanical transmission, the virus is transmitted internally or on the external surfaces of the vector, such as the wings, legs, and mouth parts.
The role of house flies in the transmission of the Corona virus remained unknown, so the study aimed to verify the possibility of transmitting house flies.
To determine whether or not house flies can carry the Corona virus, the researchers conducted two independent studies. In the first study, house flies were tested for infection after exposure to a prickly medium from Corona.
The second study dealt with environmental samples that were tested for infection after coming into contact with flies exposed to corona. In both studies, the team collected samples at different points after exposure, and they evaluated these samples by means of RT-PCR reaction and virus isolation.
The team scanned the inner surface of containers containing flies fed with different substrates to check for the presence of viral RNA and the infectious virus.
The team found that the samples collected contain viral RNA, and the infectious virus was also detected in one or two swabs collected from containers containing flies that were fed with the medium infected with the Coronavirus after four hours and 24 hours after exposure, and this means that House flies are able to spread infectious viruses in their immediate environment.
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