It looks that way. Some obesity anyway (most people probably can't blame the extra pounds on mom's lack of cleanliness). Nonetheless, a really startling and important piece of the puzzle. Need I point out that this was UCSD School of Medicine research?
[Added later: the indefatigable ERV, a virologist, addresses the finding in her characteristic idiom: (Title: "We are exposed to more viruses as we age. In other words, A VIRUS IS MAKIN MAH BABBY FAT!" Funny title, serious scientific critique.)]
New (20.3 miles/ 32.7 km)
56 minutes ago