Trichophyton Tinea Capitis When Itraconazole Fails to Achieve Mycological Clearance

Clinical scenario

This protocol addresses tinea capitis in which Trichophyton species have been confirmed on scalp mycology or culture, with no Microsporum species identified. Genus identification on scalp culture directly shapes the treatment choice, as antifungal efficacy differs between these two genera.

Escalation trigger — prior treatment did not work

The preceding line of management was oral itraconazole. Escalation to this protocol is indicated when that course has been completed but mycological clearance has not been achieved — that is, repeat scalp mycology sampling remains positive.

Treatment goal

The endpoint is mycological cure, not symptomatic improvement alone. Repeat mycology sampling is required after treatment until clearance is confirmed.

Next-step approach (partial — full protocol behind the button)

For cases that remain refractory after prior antifungal therapy, selected alternative antifungal agents may be considered in exceptional circumstances. The complete protocol specifies the agents, the conditions for their use, and the monitoring approach.

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References

As a general rule, terbinafine is more efficacious against Trichophyton species (T. tonsurans, T. violaceum, T. soudanense), and griseofulvin more effective against Microsporum species (M. canis, M. audouinii).

For cases refractory to the above regimens, other modalities to be considered in exceptional circumstances include: fluconazole and voriconazole (see main text).

The end point of treatment is mycological rather than clinical cure; therefore repeat mycology sampling is recommended until mycological clearance is achieved.

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