Bacteria sense and respond to various signals in their environment through positive feedback
loops quorum sensing two component systems riboswitchesA researcher is studying potential
virulence factors in a pathogenic species of bacteria. She begins by studying flagella and deletes a
gene involved in flagella production. She discovers that these mutant bacteria grow as well as
wild-type (unmutated) in broth cultures but have a 100 -fold increase in LD50 relative to her wild-
type (unmutated) bacteria in the mouse model of infection. Which is a likely conclusion from her
study? Select the best (most likely) answer. The wild-type bacteria kill the normal microbiota
Flagella are released and act as toxins during infection with wild-type bacteria LD50 increases so
flagella are not virulence factors during infection Bacterial motility is necessary during infection.
Bacteria sense and respond to various signals in their envir.pdf
1. Bacteria sense and respond to various signals in their environment through positive feedback
loops quorum sensing two component systems riboswitchesA researcher is studying potential
virulence factors in a pathogenic species of bacteria. She begins by studying flagella and deletes a
gene involved in flagella production. She discovers that these mutant bacteria grow as well as
wild-type (unmutated) in broth cultures but have a 100 -fold increase in LD50 relative to her wild-
type (unmutated) bacteria in the mouse model of infection. Which is a likely conclusion from her
study? Select the best (most likely) answer. The wild-type bacteria kill the normal microbiota
Flagella are released and act as toxins during infection with wild-type bacteria LD50 increases so
flagella are not virulence factors during infection Bacterial motility is necessary during infection
