Category: H

Used for glass, metal and paper articles in the laboratory, and for powders, fats and oils pharmaceutically. Penetration of hot air is slow, and a fan is necessary to maintain an even temperature in all parts of the load. The process is divided into three periods: (1) heating up period (about 1 hour for an…

The original culture of a described bacteriological species (deposited in a national collection of type cultures).  

Antibodies reacting with an antigen which has no biological relationship to the immunizing stimulus.  

Semi-synthetic penicillin possessing very similar properties to ampicillin, to which it hydrolyses in solution and in vivo.  

Micro-filter consisting of a metal holder for a membrane or asbestos pad filter, with a 5 cm³ (bijou) vital screwed at each end. The assembled apparatus is centrifuged, forcing fluid from one vial through the filter into the receptor vial.  

Cell counting chamber for the enumeration of bacteria, consisting of a thick microscope slide with a depressed platform 0.02 mm lower than the top surface, ruled with Thoma ruling—i.e., a 1 mm square subdivided into 400 squares each 1/20 x 1/20 mm (0.0025 mm² area). With the special coverslip in position 0.02 mm above this…

A classification of the cholera vibrios into 6 groups by their production of acid from mannose, sucrose and arabinose. Group 1 (mannose and sucrose positive) contains the classical pathogenic vibrios.  

Microscopical examination of bacteria—especially for motility—by observing the organisms in a drop of culture fluid hanging from the underside of a coverslip. The drop is kept from contact with the carrying slide by a cavity in the thickness of the latter, or by separating a plain slide from the coverslip by small portions of plasticene.…

Genus within the family of the Enterobacteriaceae. Motile, non- pathogenic and non-lactose-fermenting, they produce consistent biochemical reactions only when incubated at 20°C, results at 37°C being unpredictable. Urease negative, KCN positive.  

Prophylactic vaccine for protection against Pasteurella pestis, a heat-killed culture of that organism.