Five bacterial species considered to be potential pathogens in acute exacerbations of chronic bronchitis, cystic fibrosis, and pneumonia-Branhamella catarrhalis, Haemophilus parainfluenzae, Pseudomonas aeruginosa, Staphylococcus aureus and Streptococcus pneumoniae-were evaluated for their potential to synthesise histamine in vitro. Bacterial species commonly isolated from infected sputum but ge...

Recent experiments with the bacteria Paenibacillus vortex reveal a remarkable strategy enabling it to cope with antibiotics by cooperating with a different bacterium-Escherichia coli. While P. vortex is a highly effective swarmer, it is sensitive to the antibiotic ampicillin. On the other hand, E. coli can degrade ampicillin but is non-motile when grown on high agar percentages. The two bacteri...

drug toxicity. Thus Doctors Kalow, Conney, Fouts, and Remer were concerned with the effects of both individual variation in drug-metabolizing enzyme systems and of effects of other drugs such as SKF 525A on such enzymes, which can lead to marked variations in plasma levels of drug. However, as Dr. Westermann reminded us, such drugs as reserpine, monoamine oxidase inhibitors, and coumarin antico...

Bracken, Pocker & Raistrick (1954) described the isolation of two nitrogen-containing products from different cultures of Penicillium cyclopium Westling. One of these, previously isolated from Penicillium viridicatum Westling by Cunningham & Freeman (1953) and named viridicatin, C15H11NO2, was shown to be 2,3-dihydroxy-4phenylquinoline or its keto-tautomer (I), by degradative methods and unequi...

For many decades antibiotics (so called growth promoters) have been used as feed additives in various species of farm animals, to reduce the frequency of diarrhoea under certain conditions. Furthermore, in most cases performance parameters like body weight gain or feed conversion ratio improves to up to 5%. These beneficial effects of feed antibiotics are generally explained by modifications of...

T HE DECISION rendered by the Supreme Court in Diamond v. Chakrabarty1 allows the new science of biotechnology to come out of the closet and to take its place in the public domain with other scientific achievements that have, for better or for worse, shaped the industrial life of the United States. It is probable that the products which will result from this emerging science will affect each of...

Background: Infection is a vital problem in intensive care units. Currently, chlorhexidine solution is used to reduce oral colonization. This study aimed to determine the efficacy of chlorhexidine solution on oropharyngeal bacterial colonization in hospitalized patients in the intensive care units. Methods: This descriptive study (from August 2018 to May 2019) was performed on 60 patients who ...

Bacteria and allied micro-organisms are of direct economic concern to man in many ways besides causing diseases and bringing about the decomposi tion of marine a,nimals and commercial algae . There are many p roblems in the general economy of the ocean , the solu tio n of which requi res the a id of the microbio log ist. The m ic ro-organisms belong to a wide range of groups and include bacteri...