Former All Blacks winger Jonah Lomu is back in hospital fighting a kidney infection.

Auckland City Hospital spokesman Mark Fenwick said on Monday morning that Lomu’s condition was stable, according to media reports.

Earlier this month, Lomu said medical tests showed a kidney transplant he received in 2004 had failed.

He received a kidney donated by radio host Grant Kereama after he was diagnosed in 1995 with nephrotic syndrome but during the Rugby World Cup last September he was admitted to hospital after it started to fail.

He now undergoes regular dialysis to stop his renal system shutting down.

Lomu shot to fame in the 1995 World Cup when he trampled over England in a four-try performance in the semi-final.

He played 63 Tests in an international career which stretched from 1994-2002, scoring 37 tries.