For example, SSA1-SG1 and SSA1-SG2 were both infected with similar strains of Wolbachia, which were similar to those bacteria infecting butterflies and mosquitoes, whereas SSA1-SG3 was infected with a different Wolbachia. Infection levels of Rickettsia were highest in SSA1-SG3 (54%), which was also similar to the invasive Rickettsia sp. This evidence concerns the gene TRIM21 and infection.