FRANKFURT, Nov 18 (Reuters) - Europe's largest lab operator...

FRANKFURT, Nov 18 (Reuters) - Europe's largest lab operator Synlab could extend its lead with acquisitions after wrapping up a deal to refinance almost 1 billion euros ($1.1 billion) of debt, it said on Friday.

"We are now more prepared than ever to further drive our strategic acquisition course while at the same time growing the company organically," Synlab Chief Executive Bartl Wimmer said in a statement.

The German lab chain - which operates in more than 30, mainly European countries - said it was looking at selective acquisitions in its current and in new markets.

European lab chains, providing standard blood and urine tests as well as other medical and veterinary diagnostic services, have been consolidating to cut costs over recent years, but the industry remains fragmented as healthcare reimbursement rules differ considerably between European Union member states.

Private equity firm Cinven bought Synlab last year in a 1.8 billion euro deal, shortly after it had acquired French medical diagnostics provider Labco for 1.2 billion euros. Wimmer was then put in charge of folding Labco into Synlab.

In Europe, that put the group ahead of its closest rival, Australia's Sonic (SHL) , which is focusing on fewer national markets in the region.

Synlab earlier this month issued 940 million euros in notes to be traded on the debt market, mainly to replace older notes worth 775 million euro, taking advantage of lower borrowing costs.

Sources close to the matter have told Reuters that private equity groups Apax and Nordic Capital have been gauging prospective buyers' interest in their labs business, Unilabs, while investor PAI Partners is looking into the sale of its French lab testing chain Cerba.

A spokesman for Synlab declined to say which targets the group was looking at.

($1 = 0.9414 euros)