Analysesa for Tear and Serum Immunoreactivity to Chlamydiaceae Species-Specific Hsp60 for Individuals Infected with C. trachomatis, C. psittaci, and C. pneumoniae, and for All Infections, Comparing Those with Scarring and/or Trichiasis to Those with No Evidence of Trachoma. This evidence concerns the gene HSPD1 and Trichiasis.