Tag: "isolates" at biology news

Researchers Discover How Ulcer Bug Becomes Antibiotic-Resistant

... researchers therefore examined pairs of H. pylori isolates from patients in Peru and Lithuania, where infection rates are very high. The two members of each pair came from the same patient and were chosen because one was metronidazole-sensitive while the other was resistant. By analyzing DNA from th...

Neurogenetics Lab Scan Suggests Genetic Linkage On Chromosomes 4 And 11

...etically and environmentally homogenous population isolates using a combination of whole genome linkage and direct analysis of candidate genes. Well-defined groups such as American Indian tribes provide unique opportunities to identify common genetic and environmental influences on complex diseases such as al...

New Rehabilitative Device Combines Form And Function For Children With Mobility Impairments

...o adult height."It's easier for the therapist, but isolates the child," said Tierney,explaining that the height can be frightening to small children andprevents them from interacting with others. Many impaired children spendthree or four hours a day in a prone stander, and that is a long time tobe separated f...

Bacteria Becoming Increasingly Resistant To Antibiotics, But New Vaccines Are On The Horizon

...ited States as well as worldwide, the pneumococcal isolates that are resistant to antibiotics have been increasing infrequency -- dramatically. Not only the frequency is increasing but the degreeof resistance also is consistently becoming greater," according to Dr. Arditi.He said there is concern that clin...

NIAID-Supported Scientists Discover Origin Of HIV-1

...uci, M.D., NIAID director. "We now have chimpanzee isolates of simianimmunodeficiency virus [SIVcpz] that have... genetic techniques, they analyzed the four SIVcpz isolates andcompared them with various HIV-1 viruses taken from humans. They alsodetermined the subspecies i...

Experimental Staph Vaccine Broadly Protective In Animal Studies

...unt for 40 percent to 60 percent of bacterialblood isolates from hospitalized patients," says Dr. Pier. "Therefore, anadditional potential advantage of a PNSG vaccine might be protection against thespectrum of clinically important CoNS." Dr. Pier adds that he and his colleagues hope to move the PNSG vaccine ...

Researchers identify novel penicillin-resistance gene in pneumonia bacteria

...The mechanism of penicillin resistance in clinical isolates of pneumococci was first identified in the Tomasz lab in 1980. He and former graduate student Sonia Zighelboim, Ph.D., studied South African strains of pneumococci that were a thousand times more resistant to penicillin than any other previous strain...

Study contradicts assumption that ulcer bug has always plagued humans

...n. The DNA analysis classified the H. pylori isolates into five types. Type I DNA motifs predominated in the strains from Spain, Peru, Guatemala and native Africans. Type II motifs were most common in the Chinese and Japanese strains, whereas type III motifs predominated in the Indian strains. Each of t...

American Society for Microbiology news tips for November 2000

...xtremely high level of genetic diversity among HIV isolates taken in the Democratic Republic of Congo (DRC) su...pes. In the study, the researchers tested 247 HIV isolates in the DRC (formerly known as Zaire) to determine the genetic diversity of HIV-1 infections in that ...

Tipsheet: Journals of the American Society for Microbiology

...of eight different antibiotics on 300 enterococcal isolates from the hospital, a third of which were resistant to vancomycin. Only the antibiotic nitrofurantoin was effective against them all. "We conclude that nitrofurantoin may provide effective treatment of urinary tract infections caused by vancomycin...

Tips from the journals of the American Society for Microbiology: February 2001

... possible to use combinations of C. jejuni chicken isolates as a defined bacterial preparation for the competitive exclusion of human-pathogenic C. jejuni in poultry," say the researchers. Campylobacter jejuni is one of the most common causes of bacterial gastroenteritis in the United States and poultry c...

Genomic analysis of pathogenic and benign gastritis bacteria

...ntal effects or because only a subset of H. pylori isolates are virulent. Work in a gerbil model argues for the latter possibility, and Israel et al. use whole genome analysis to examine the genetic differences between 2 strains, B128 and G1.1 that differ in their biological effects. When studied in live an...

Ketek (Telithromycin) highly active in vitro against Streptococcus pneumoniae

...s demonstrated excellent in vitro activity against isolates of Streptococcus pneumoniae (S. pneumoniae), inclu... As part of the worldwide PROTEKT study, bacterial isolates from patients with community-acquired pneumonia (CAP), acute bacterial exacerbation of chronic bronc...

Scary study: Selenium deficiency causes flu virus to mutate into more dangerous forms

...ne. All 29 were identical in three different viral isolates from selenium-deficient mice studied, and one viral isolate from a selenium deficient mouse showed five additional mutations." In contrast, she said, researchers found only one to three mutations in the genes for the hemagglutinin or neuraminid...

Presbyterians vote in favor of fetal, embryonic, and stem cell research

...ndergoing in vitro fertilization; the other method isolates stem cells from aborted fetuses. Stem cells have the ability to divide for an indefinite period in culture and can develop into most of the specialized cells and tissues of the body, such as muscle cells, nerve cells, liver cells, and blood cells. Th...

Widespread 'superbug' is expert at acquiring drug-resistance

...h hospitals. Danish colleagues had saved all blood isolates of staphylococci since 1957, including both drug-s...ain a characteristic fingerprint of the first MRSA isolates from the United Kingdom and Denmark. Interestingly, these early isolates from the two countries pr...

Slight molecular tweak, and flu virus becomes a killer

...e of one of two forms of the virus. All human H5N1 isolates proved deadly when chickens were exposed to the virus: "It kills chickens within 36 hours," says Kawaoka, whose research was supported by the National Institute of Allergy and Infectious Diseases. "It causes systemic infection and the virus even grow...

Most eastern North American reserves too small

...adjacent slivers of Canada. If future development isolates other reserves in this mammal province, they could also lose species. To estimate the smallest size these reserves could be without losing species, Gurd and his colleagues compared the historical and current numbers of species in 10 reserves in the m...

Estrogen found in soy stimulates human breast-cancer cells in mice

...In Cancer Research, Helferich compared soy protein isolates containing varying levels of isoflavones. The researchers found that estrogen-dependent tumor growth increased as the isoflavone content increased in the soy-containing diet....

PNNL science, technology help keep America safe

...requiring a purified cell, proteins or DNA. BEADS isolates bacteria, spores, viruses and their DNA from air, dirt or water samples. The PNNL-developed technology is fully automated so that detectors can analyze samples and monitor for threats without requiring a person to manually prepare the samples. With...

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