* FTSEurofirst 300 down 2.1 pct, reversing recent gains
* Airlines, luxury stocks among most hit by flu concerns
* Banks hurt by renewed worries over capital increases
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By Blaise Robinson
PARIS, April 28 (Reuters) - European stocks tumbled in early trade on Tuesday, reversing a two-session rally, hit by growing fears about the economic impact of the swine flu outbreak and renewed concerns over capital increases in the banking sector.
At 0805 GMT, the FTSEurofirst 300 <
> index of top European shares was down 2.1 percent at 797.04 points. "This won't help sentiment, but for now, we're at the beginning of the outbreak and it's hard to anticipate the impact on the world economy," said Sebastien Barthelemi, analyst at Louis Capital Markets, in Paris."In the short term, airlines, hotel and oil companies are vulnerable, while drug companies could benefit from the situation."
Airline stocks were among the hardest hit, with British Airways <BAY.L> down 5.6 percent and Ryanair <RYA.I> down 3.7 percent.
Fears over the flu outbreak were also dragging on shares of luxury groups, with Bulgari <BULG.MI> down 4 percent, Richemont <CFR.VX> down 6.1 percent, Burberry <BRBY.L> down 5.7 percent and LVMH <LVMH.PA> down 3.1 percent.
"A serious epidemic can be the 'perfect storm' for international travel...our ball park assessment is that circa 20 percent of luxury products are purchased by people travelling for some reason," Bernstein analysts wrote in a note.
"If swine flu was like SARS, i.e. far from devastating but serious enough, the more probable risk for luxury stocks is short-term weakness and extended range bound trading," they wrote.
Drugmakers rose, boosted by an expected rise in flu drug sales. GlaxoSmithKline <GSK.L> gained 1 percent, also lifted by positive data about the company's Avodart drug, while Roche <ROG.VX> was up 0.4 percent.
Authorities worldwide took steps on Tuesday to stop the spread of the new strain of flu that has killed up to 149 people in Mexico in a couple of weeks and spread to Europe and possibly Asia, with the World Health Organisation raising its alert level.
Investors fear the flu could develop into a pandemic and kill off hopes of a recovery in the global economy.
FRESH CAPITAL HIKE FEARS
The banking sector was also in the spotlight on Tuesday after the Wall Street Journal reported that U.S. regulators have told Bank of America Corp <BAC.N> and Citigroup Inc <C.N> that following recent stress testing of the two banks they may need to raise more capital.
The shortfall in capital amounts to billions of dollars at BofA, the paper said. BofA was not immediately available to comment while a Citigroup spokesman in Hong Kong declined to comment. A Federal Reserve spokeswoman declined to comment.
Deutsche Bank <DBKGn.DE> was down 6 percent, UBS <UBSN.VX> was down 4.1 percent, BNP Paribas <BNPP.PA> down 4.7 percent and Barclays <BARC.L> down 4.4 percent.
Citigroup shares traded in Frankfurt <TRV.F> were down 8 percent, while BofA shares traded in Frankfurt <BAC.F> were down 6.8 percent.
On the macro front, investors were bracing for U.S. consumer confidence monthly data, due at 1400 GMT, and seeking insight on the outlook for consumer spending in the world's biggest economy.
The FTSEurofirst 300 index is down 4.4 percent in 2009, but has risen 23 percent since reaching a multiyear low in early March.
(Editing by David Cowell)