Abstract: A system for depositing cells on an analysis plate, the cells being contained in a cell suspension including a fixing agent and the cells, included, for receiving the suspension, a chamber (5) which is positioned above the analysis plate and whose base is open and extends opposite a cell depositing zone of the plate and a material for absorbing the fixing agent placed around the chamber and the depositing zone of the plate. The chamber is mounted so as to be able to be moved between a first position in abutment against the analysis plate in order to allow the cells to be deposited on the depositing zone of the plate via decantation and a second position remote from this analysis plate in order to place the chamber in a fluid relationship with the absorption material in order to allow this material to absorb the fixing agent.

Abstract: Cationic surfactants derived from the condensation of fatty acids and esterified dibasic amino acids, such as from lauric acid and arginine, in particular the ethyl ester of the lauramide of the arginine monohydrochloride (LAE), may be used for the protection against the growth of the microorganisms. The cationic surfactants of this type are also effective against virus infections. Addition of LAE to cultures of Herpes virus type 1 Vaccinia virus and bovine parainfluenzae 3 virus leads to nearly complete reduction of the virus organisms in these cultures, such effects being observed after 5 and 60 minutes.

Abstract: A cytological sampling brush includes a manipulation handle (2) at one of end of which are provided a first portion in the form of exocol sampling brush (4) and a second portion in the form of endocol sampling swab (5) at the center of the first portion in brush (4) form. This brush is characterized in that the second portion in swab (5) form is attached at the end of the handle (2) and is removable from the first portion by sliding in a hole (6) of the first portion in brush (4) form, provided with elements (7) for retaining cells for collecting cells from the second portion in swab (5) form, during retraction of the first portion in brush (4) form.

Abstract: The invention relates to the combination, in solution or in a kit, of a histological or cytological fixing solution and of one or more photoactivatable compounds of the family of quinones, in particular, hypericin, hypocrellin A and/or hypocrellin B. The invention also relates to a method for labeling cells or tissues by one or more photoactivatable compounds of the family of quinones, in which the cells or tissues in contact with a histological or cytological fixing solution are labeled, simultaneously or subsequently, by the photoactivatable compound(s) of the family of quinones.