Bats are transmitters of dangerous human infections

June 7, 2016, National Research Tomsk State University
The bats. Credit: TSU

Tomsk State University zoologist Maria Orlova participated in an international research project dedicated to parasites of bats from Mexico and the Antilles. The study proved that both parasites and bats can act as the transmitters of dangerous human infections.

The scientific community has commonly believed that are ecologically isolated from other vertebrates. Thus, for a long time, bats were not considered to be transmitters of dangerous infections, which was one reason that bat parasites are understudied. An international research team has focused on studying the role of bats and their parasites in the transmission of dangerous natural focal infections in Central America and the Antilles archipelago, where tourism is widespread.

One of the most important goals of the research is to determine which infections are transmitted by bats and their parasites and whether human infection is possible. The Antilles are tropical habitats for many bats species and a significant number of bat parasite species. Both were tested for any infections, according to Orlova, a postdoc of the TSU Laboratory for Biodiversity Monitoring.

Opinions about the isolation of bats in the tropics are changing. Bats are now known to be closely interconnected with other groups of animals. Bats tend to inhabit human-made shelters, which makes their direct contact with people possible. In the wild, they exchange parasites and infections with rodents, which often live near people; thus, transmission of infections is possible through this link, as well.

"The samples from the bats contained gamasid mites. They are common with rodents, which indicates cohabitation," says Orlova. 'In Siberia, such findings are extremely rare, but the warmer the climate, the closer the contact between bats and rodents. Cases of parasite exchange become more frequent, so the probability of contagion grows." The infection cycle may include not only specific mites, but also human-biting mosquitoes, which comprise yet another vector of infection to humans.

The gamasid mite. Credit: TSU

Thus, listing the infections and studying transmission routes becomes urgent. For instance, the researchers in this project found causative bacteria of such genera as Bartonella, Ehrlichia, and Rickettsia, and also nematodes of the Litomosoides genus in the tissue and parasites of bats. Those are infections that may threaten people as well.

Most common bat are harmless for people, but the research proves that these mites may spread the disease among small mammals, which may in turn transmit the to people. "This is why it is absolutely necessary to study gamasid mites," concludes Orlova.

Explore further: Study in bats and rodents offers insights on how viruses spread across species

More information: Jason D. Beck et al, First record of Chiroderma improvisum Baker & Genoways, 1976 (Chiroptera: Phyllostomidae) from Saint Kitts, Lesser Antilles, Check List (2016). DOI: 10.15560/12.2.1854

Related Stories

Are vampire bats nature's misunderstood monsters?

October 30, 2015

Werewolves, ghosts, and vampires—with the days getting shorter and colder, and Halloween fast approaching, our imaginations turn to the ghouls that supposedly come out around this time of year. Vampires, one of history's ...

Study documents African monkeys eating bats

May 24, 2016

Although Cercopithecus monkeys, a widely distributed genus in Africa, usually have a discerning palate for fruits and leaves, they are opportunistic omnivores that sometimes consume lizards, snakes, birds and mice. These ...

West African bats—no safe haven for malaria parasites

October 21, 2013

In Europe, bats are normally discussed in the context of endangered species threatened by loss of their habitats. However, in recent years, bats have caught the eye of infection biologists. The animals are namely hosts to ...

Recommended for you

Coffee-based colloids for direct solar absorption

March 22, 2019

Solar energy is one of the most promising resources to help reduce fossil fuel consumption and mitigate greenhouse gas emissions to power a sustainable future. Devices presently in use to convert solar energy into thermal ...

EPA adviser is promoting harmful ideas, scientists say

March 22, 2019

The Trump administration's reliance on industry-funded environmental specialists is again coming under fire, this time by researchers who say that Louis Anthony "Tony" Cox Jr., who leads a key Environmental Protection Agency ...

The taming of the light screw

March 22, 2019

DESY and MPSD scientists have created high-order harmonics from solids with controlled polarization states, taking advantage of both crystal symmetry and attosecond electronic dynamics. The newly demonstrated technique might ...


Please sign in to add a comment. Registration is free, and takes less than a minute. Read more

Click here to reset your password.
Sign in to get notified via email when new comments are made.