The elephant is being quarantined at the Thai Elephant Conservation Centre in Lampang.
Saran Chansittivej, a veterinarian tending to the elephant, said on Sunday that blood and stool tests found Plai Sak Surin free of the following diseases:
• Trypanosoma evansi and parasites
• Virus that causes tuberculosis
• Herpes simplex
• Leptospirosis
• Foot-and-mouth disease
• Brucella abortus.
Plai Sak Surin, who was presented to Sri Lanka as a token of goodwill, was repatriated to Thailand on July 2 after an animal rights group raise a hue and cry after noticing injuries on the elephant from apparent maltreatment.
The vet said the jumbo appears in good health and in a good mood. He has a good appetite, consuming between 120 and 200 kilograms of fresh grass and some fruit, plus salt, daily.