Although there were low levels of preexisting antibiotic-resistant bacteria before the widespread use of antibiotics, evolutionary pressure from their use has played a role in the development of muiltidrug resistance varieties and the spread of resistance between bacterial species.

They are also found in some bacteria, notably Mycobacterium tuberculosis where they appear to have a key role in pathogenesis.

For example, the giant amoeba Pelomyxa lacks mitochondria but has aerobic bacteria that carry out a similar role.

* Bacterioplankton, bacteria and archaea, which play an important role in remineralising organic material down the water column ( note that the prokaryotic phytoplankton are also bacterioplankton ).

Thomas Boller and others proposed that the vacuole participates in the destruction of invading bacteria and Robert B Mellor proposed organ-specific forms have a role in ' housing ' symbiotic bacteria.

The development of bacteriology toward the end of the 19th century led to an understanding of the role played by nitrogen fixation by bacteria.

The amoebocytes probably function in protection from bacteria and other foreign bodies ; in some species, they also play a role in reproduction.

Disulfide bonds play an important protective role for bacteria as a reversible switch that turns a protein on or off when bacterial cells are exposed to oxidation reactions.

Rats played a primary role in spreading bacteria, such as Yersinia pestis, which is responsible for the Justinianic plague and Bubonic plague.

The stain later played a major role in classifying bacteria.

This drug has been shown to be effective in killing both the adult worm of O. volvulus and Wolbachia, the bacteria believed to play a major role in the onset of onchocerciasis, while having no effect on the microfilaria of L. loa.

Most decomposers are bacteria or fungi, though scavengers also play an important role in decomposition if the body is accessible to insects and other animals.

Interest in understanding the role of bacteria in stomach diseases was rekindled in the 1970s, with the visualization of bacteria in the stomach of gastric ulcer patients.

They are also believed to play a role in endocytosis, oncogenesis, and the uptake of pathogenic bacteria and certain viruses.

Communication between bacteria ( quorum sensing ) plays a role in the regulation of luminesence in many bacterial species.

The resultant hardened structure can be compared to concrete ; with the fossilized bacteria playing the role of aggregate, and the smaller calcium phosphate salts being the cement.

Its physiological role is to bind to phosphocholine expressed on the surface of dead or dying cells ( and some types of bacteria ) in order to activate the complement system via the C1Q complex.

The physiological role of CRP is to bind to phosphocholine expressed on the surface of dead or dying cells ( and some types of bacteria ) in order to activate the complement system.

Saprotrophic bacteria and fungi are decomposers, and play a pivotal role in the nitrogen and carbon cycles.

Filarial parasites have symbiotic bacteria in the genus Wolbachia, which live inside the worm and which seem to play a major role in both its reproduction and the development of the disease.

The role of bacteria in lactational mastitis and some considerations of the use of antibiotic treatment.

Vernix is also thought to have an antibacterial effect ; though there is little evidence to support a chemical role of vernix in protecting the infant from infection, it may form a physical barrier to the passage of bacteria.

A new South is emerging after the post-bellum years of hesitation, uncertainty, and lack of action from the Negro in defining his new role in the amorphously defined socio-political organizations of the white man.

The book concerned with the Negro's role in an urban society is rare indeed ; ;

Great stress is placed on the role that the monitoring of information sending plays in maintaining the effectiveness of the network.

To perpetuate wealth control led by small groups of individuals who played no role in its creation prevents those with real initiative from coming to the fore, and is basically anti-democratic.

I am not aware of great attention by any of these authors or by the psychotherapeutic profession to the role of literary study in the development of conscience -- most of their attention is to a pre-literate period of life, or, for the theologians of course, to the influence of religion.

He went on to say: `` In the first place, industry per se is not dedicated to the role of savior of foundering municipalities.

In the over-all process, it is difficult to assign a `` pure '' role to each constituent of a built-detergent formulation ; ;

There is some evidence that naturally occurring goitrogens may play a role in the development of goitre, particularly in Tasmania and Australia ( Clements and Wishart, 1956 ).

In view of the important role which emotional disturbances play in the genesis of neurotic and psychotic disorders and the parallelism observed between autonomic states and psychological behavior in several instances, it is further suggested that a hypothalamic imbalance may play an important role in initiating mental changes.

Correlatively, can we reduce the role of the district courts, so that the action is that of the people of the community or other school district and not that of the law court??

Perhaps the very important question -- What is, then, exactly the role of kinesthetic sensations in the patient's ability to recognize forms and shapes by means of the tracing movements when he is actually looking at things??

In a growing number of American homes, marriage counselors report, the wife is taking a commanding role in sexual relationships.

It is only natural that she assert herself in the sexual role.

A world in which wives have taken a more active role is likely to produce sexual relationships in which wives are more self-assertive, too ''.

The latter plays a prominent role in Roman Catholic theology and is considered decisive, entirely apart from Scripture, in determining the ethical character of birth-prevention methods.

The role of an earthquake in starting the destruction of whole cities is tremendously frightening, but fire may actually be the principal agent in a particular disaster.

She may well be incapacitated by it when she is confronted with present and future alternatives -- e.g., whether to prepare primarily for a career or for the role of a homemaker ; ;

The vulnerability of Protestantism to social differences stems from the peculiar role of the new religious style in middle-class life, where the congregation is a vehicle of social and economic group identity and must conform, therefore, to the principle of economic integration.

Now a quiet-spoken, middle-aged man, Fiedler is an aeronautical engineer for Lockheed's Missiles and Space Division at Sunnyvale, where he played a key role in the development of the Navy's Polaris missile.

What ought to be, what is his potential role as a force for constructive social change??

Obviously, much more than customer expectation is determining the realtor's role.

Dolores Hart, is charming in a leading role, and quite believable.

Then there is a matchmaker, one Mikeen Flynn, a role for which Eddie Foy was happily selected.