PorB sequence of the patient’s N. gonorrhoeae isolate reveals class PorB.1B. The PorB amino acid sequence of the patient’s isolate is shown with the eight surface-exposed loops highlighted in gray. A major difference between PorB.1B and PorB.1A lies in loop 5 (underlined); PorB.1A has a shorter loop 5 (usually ∼9 amino acids) than PorB.1B (8). The sequence shows 100% amino acid identity to the PorB (NEIS2020) allele 5325 (PorB.1B) in PubMLST.