Infected with Wolbachia. The Wolbachia bacteria can infect a diversity of insect species, such as this mosquito (Plasmodium berghei). (a) The mosquito is seen under normal light. (b) When the mosquito and bacteria are treated to glow in different colors, the bacterial cells show up as red spots inside the mosquito’s body.

Photo (a) by CDC/Jim Gathany. Photo (b) from Applied and Environmental Microbiology, 2012, 78, 1497–1495, doi: 10.1128/AEM.06751-11. Reproduced with permission from American Society for Microbiology. Image courtesy of Jason Rasgon and Ryuchi Koga.