Using the information below to answer the following two questions. Chlamydia trachomatis, Chlamydia pneumoniae, and Chlamydia psittaci are three intracellular bacterial pathogens in the same genus. Interestingly, they vary considerably in the diseases they cause. C. trachomatis is a sexually transmitted bacterium that infects the epithelial cells of the genital tract. C. pneumoniae is transmitteed via respiratory droplets from an infected human and can infect the epithelial cells in the throat and the lungs and cause pneumonia. C. psittaci is primarily a pathogen of birds. Within infected birds, the bacterium infects cells in the respiratory tract.These three Chlamydia pathogens all evolved from a common ancestor. How could genetic changes have occurred over time to give rise to these different pathogens? Select all that apply. horizontal gene transfer of new virulence genes vertical gene transfer of intact genome advantageous mutations during genome replicationThinking about the disease process, what types of factors/genes might differ amongst these species and contribute to the differences described above? Choose the best answer. adhesins affecting tropism to both host and areas of attachment within host nutrition requirements of pathogen vary method of entry in host. toxins affecting type of damage induced in host.

1. Using the information below to answer the following two questions. Chlamydia trachomatis,
Chlamydia pneumoniae, and Chlamydia psittaci are three intracellular bacterial pathogens in the
same genus. Interestingly, they vary considerably in the diseases they cause. C. trachomatis is a
sexually transmitted bacterium that infects the epithelial cells of the genital tract. C. pneumoniae is
transmitteed via respiratory droplets from an infected human and can infect the epithelial cells in
the throat and the lungs and cause pneumonia. C. psittaci is primarily a pathogen of birds. Within
infected birds, the bacterium infects cells in the respiratory tract.These three Chlamydia pathogens
all evolved from a common ancestor. How could genetic changes have occurred over time to give
rise to these different pathogens? Select all that apply. horizontal gene transfer of new virulence
genes vertical gene transfer of intact genome advantageous mutations during genome
replicationThinking about the disease process, what types of factors/genes might differ amongst
these species and contribute to the differences described above? Choose the best answer.
adhesins affecting tropism to both host and areas of attachment within host nutrition requirements
of pathogen vary method of entry in host. toxins affecting type of damage induced in host