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[Direct demonstration of Coxiella burnetii from air samples on slides coated with kraton 1107].

Inactivated Coxiella burnetti (strain Henzerling) was introduced into a sealed chamber in aerosol form and recovered on Kraton 1107-coated slides with the aid of slit samplers. Following auramine staining, the coxiellae could be demonstrated directly by microscopy. Under the experimental conditions chosen, the limits of demonstrability were initial Coxiella contents of 2.26 X 10(3) in 14 L or 3.6 X 10(5) in 1 m3 of air.