section I. Rickettsia and human rickettsioses -- section II. Tick-borne rickettsioses -- section III. Anaplasmataceae and human anaplasmosis and ehrlichioses -- section IV. Orientia tsutsugamushi and scrub typhus -- section V. Coxiella burnetii and Q fever -- section VI. Wolbachia -- section VII. Diagnostic strategy of rickettsial diseases in humans -- section VIII. Rickettsial diseases of domestic animals -- section IX. Genomics of rickettsial agents -- section X. Antimicrobial susceptibility of rickettsial agents.