(CC-licensed image by Flickr user laverrue)
Gregory Glass is a disease ecologist — he studies the relationship between pathogens and hosts. A professor at Johns Hopkins Bloomberg School of Public Health, Glass's laboratory is Baltimore's urban underbelly, where he hangs out with beefy sewer rats. Apparently, Baltimore is a hotbed of rat research. I wonder if Glass has encountered any Rat Kings. From Smithsonian:
Glass has been following the secret lives of wild Norway rats – otherwise known as brown rats, wharf rats, or, most evocatively, sewer rats — for more than two decades now, but Baltimore has been a national hotspot for rat studies for well over half a century. The research push began during World War II, when thousands of troops in the South Pacific came down with the rat-carried tsutsugamushi disease, and the Allies also feared that the Germans and Japanese would release rats to spread the plague…
Glass – who started off studying cotton rats in the Midwest – traps the animals with peanut butter baits and monitors the diseases they carry. (Hantavirus, once known as Korean hemorrhagic fever, and leptospirosis – which can cause liver and kidney failure – are of particular concern.) Lately he's been interested in cat-rat interactions. Cats, he and his colleagues have noticed, are rather ineffectual rat assassins: they catch mainly medium-sized rodents, when they catch any at all. This predation pattern may actually have adverse effects on human health: some of the deceased mid-sized rats are already immune to harmful diseases, while the bumper crops of babies that replace them are all vulnerable to infection. Thus a higher proportion of the population ends up actively carrying the diseases at any given time.
