Establishment of Intestinal Bacteriology

Interaction between Intestinal Microbiota and Serotonin Metabolism

Gut microbiota regulates the production of signaling molecules, such as serotonin or 5-Hydroxytryptamine: 5-HT in the host. Serotonin is a biogenic amine that acts as a neurotransmitter in the gut and brain. There is a perfect interaction between human gastrointestinal microbiota and the serotonin system. The gut microbiota plays an important role in the serotonin signaling pathways through the...

Plasmid establishment in competent Haemophilus influenzae occurs by illegitimate transformation.

Establishment of plasmids in naturally competent Haemophilus influenzae is incompatible with transformation via the normal DNA translocation pathways. Instead, establishing plasmids appear to evade the degradation which ordinarily accompanies translocation, arriving as intact double-stranded molecules in the cytoplasm. Evidence is presented that plasmid establishment is a rare illegitimate tran...

Isolation and pathogenicity identification of avian paramyxovirus serotype 1 (Newcastle disease) virus from a Japanese quail flock in Iran

Newcastle disease virus (NDV) was isolated and identified for the first time from a flock of Japanese quail suspected to ND in Iran. Birds of the flock aged variously, and some of them died from the disease. Loss of appetite, weakness and decrease in egg production, diarrhea and nervous symptoms were the main clinical signs in the birds. Hemorrhagic lesions of the intestinal tracts and proventr...

Estimates of the overall rate of growth of the intestinal microflora of hamsters, guinea pigs, and mice.

rpe, a cis-acting element from the strA region of the Haemophilus influenzae chromosome that makes plasmid establishment independent of recombination.

Plasmids that share homology with the Haemophilus influenzae chromosome transform wild-type cells more efficiently than they transform recombination-defective mutants. A 5.2-kilobase-pair chromosomal fragment containing the strA gene of H. influenzae was found to promote efficient plasmid establishment in recombination-defective mutants. A cis-acting element in the insert, called rpe for rec-le...