(Reuters) - Merck & Co reported a quarterly loss compared with a year-ago profit on Friday, hurt by a charge related to the formation of a collaboration with AstraZeneca Plc.
Net loss attributable to Merck was $56 million, or 2 cents per share, for the third quarter, compared with a year-ago profit of $2.18 billion, or 78 cents per share.
Sales fell to $10.33 billion from $10.54 billion.
(Reporting by Manas Mishra in Bengaluru; Editing by Martina D'Couto)
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