Complex sentence: Infection is treated and cured with metronidazole or tinidazole, usually as a single-dose therapy, and should be prescribed to any sexual partner (s) as well because they may be asymptomatic carriers.
Split into simpler sentences: Infection is treated and cured with metronidazole or tinidazole. Medication should be prescribed to any sexual partner (s) as well because they may be asymptomatic carriers.