Totilas, the superstar stallion ridden by Matthias Alexander Rath of Germany is taking a break from training and breeding, the rider told Ridehesten.com.
The pair has not competed since the German championships last June, one of only two shows for all of 2012. The other was the Horses & Dreams at Hagen in Germany
Matthias said that the viral infection, mononucleosis, made him too ill to ride at the Olympic Games in London last summer.
Then he switched to training with former Dutch coach Sjef Janssen at Erp, the Netherlands, with Totilas and other horses.
The 13-year-old KWPN black horse (Gribaldi x Lominka x Glendale), Matthias told Ridehesten, sustained a minor injury while breeding recently.
But the horse was now on a break so it was not interfering with training.
Matthias made his remarks at the Vechta, Germany stalion show where he showed off Fürst Romancier and Bretton Woods.
No plans have yet been made for the outdoor season but he said he definitely wants to go to the European Championships in Herning, Denmark in August.