The bump on a young California girl's hand was mysterious -- and growing. It wasn't until she had seen two doctors and undergone a biopsy that her family realized the cause: The child had gotten in the way of a hungry iguana with a sweet tooth, resulting in what may be the first documented infection of a rare bacterial infection in a human from an iguana bite.
The girl, Lena Mars, is featured in a scientific presentation on the case that will be given at the European Congress of Clinical Microbiology and Infectious Diseases in April. She is still recovering at her family's home in San Jose, California after the unexpected ordeal, which started on a vacation in March 2022.
The iguana ran up to the girl and bit her on the back of her left middle finger, causing her to loosen her grip on the cake. The reptile then ran off with the snack, but it did leave something else behind.lab testing for the case as a part of the Department of Pathology at Stanford University. Mah said the girl's parents probably weren't thinking about the bite when they took her to a doctor because of the bump on her hand.
The wound appeared to have cleared up in about two weeks. It was only five months later, when her parents noticed a dime-size bump on the girl's hand in the same spot, that they thought they should take her to another doctor. The girl told them it didn't hurt, and there were no other symptoms. It's ubiquitous in fresh and salt water but rarely infects humans. Typically, when humans are infected, it's after a wound has been exposed to the bacteria in water. Most people who get these infections develop a rash that may spread in a spherical pattern. It may develop a nodule with pus or turn into an ulcer.don't typically work on these kinds of infections, so doctors started the girl on rifampin, an antimicrobial, and clarithromycin, an antibiotic often used for skin infections.
Growing M. marinum in the lab required a lower temperature than most bacteria. This particular bacteria likes to grow at about 82 to 86 degrees Fahrenheit. Most bacteria are cultured around 95 to 98.6 degrees, "Typically, they will go about their day and not want to bother anyone or be bothered by anyone. But like any wildlife, if they start associating people with food, they're going to risk coming closer," Meyer said. In this case, other tourists in Costa Rica might have fed the wild iguana until it became habituated to people and developed certain expectations of them.
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