Apparatus for registering the presence of bacteria, particularly in field conditions

Abstract

Abstract The invention relates to an apparatus for registering the presence of bacteria, particularly under field conditions. The apparatus includes a plate (1), in which there is formed a luminescence chamber (2) which is defined at its opening (3) by a support lattice (5) carrying a filter (4), the lattice opening out into and being carrying sealingly against the plate (1) with the aid of a liquid-sealing and opaque collection vessel (6). The plate (1) includes a transparent portion (7) which is situated above or opposite the opening (3) of the chamber (2). There is a means (8) above the portion (7) for registering a light flux caused by luminescence, said means (8) being accommodated in an opaque housing (13) sealing against the plate (1), and there is an aperture plate (9) displaceably arranged above the portion (7) between the plate (1) and the means (8) to prevent unintentional exposure of the means. Bacteria are enriched from a liquid sample on the filter (4), a chemical treatment of the bacteria on the filter provides light in the chamber by luminescence, the luminescence in the chamber being dependent on the chemicals being retained in the chamber by filter (4). Registration of the light taking place electronically or on a light-sensitive, rapidly developing, photographic film, when the light image which the luminescence achieves is either registered electronically or is read off on the film in the form of a large or smaller light patch or in the form of a grey tone which can be compared with a grey tone scale to define a measure of the bacteria content.

Inventors

• 👤 Einar Lundblom

Bibliographic Details