Autochthonous Intestinal Microflora
نویسندگان
چکیده
Based on agglutination, complement fixation, bactericidal, and opsonization tests, it is evident that suspensions of a Bacteroides sp. isolated from the mouse intestine and given by parenteral routes do not initiate antibody formation in mice. Rats also respond poorly to the antigenic stimulus. In contrast, suspensions of other bacterial species isolated from the rodent intestine are highly immunogenic. Furthermore, high titers of antibody are produced in rabbits, guinea pigs, and sheep after parenteral injection of the Bacteroides suspensions. Marked differences in the absolute and relative numbers of Bacteroides in the intestinal contents of rodents and the latter three animal species have been demonstrated. It is proposed that the immunological unresponsiveness of rodents to this organism is related to its existence as a member of the autochthonous microflora in these animals.
منابع مشابه
Antigenic cross-reaction between mouse intestine and a member of the autochthonous microflora.
Antigenic cross-reaction has been demonstrated between homogenates of intestine taken from fetal mice and suspensions of a Bacteriodes species isolated from the large intestines of normal adult mice. This observation provides an explanation for the lack of immunological response observed in mice after antigenic stimulation with this member of the normal autochthonous intestinal flora of these a...
متن کاملThe Lactobacillus and Bifidobacterium microflora of the human intestine: composition and succession.
Lactobacillus and bifidobacterial cultures are increasingly used as probiotics in pharmaceuticals and in foods. The selection of strains is performed often for technological rather than for microecological reasons. Detailed reports about species and strains composition of these microorganisms in the intestinal microflora of man are rare. Our investigations were performed with samples originatin...
متن کاملSurvival of selected bacterial species in sterilized activated carbon filters and biological activated carbon filters.
The survival of selected hygienically relevant bacterial species in activated carbon (AC) filters on a bench scale was investigated. The results revealed that after inoculation of the test strains the previously sterilized AC absorbed all bacteria (10(6) to 10(7)). After a period of 6 to 13 days without countable bacteria in the effluent, the numbers of Escherichia coli, Pseudomonas aeruginosa,...
متن کاملShort communication:Effect of oral consumption of Aloe vera gel on intestinal microflora and liver tissue of rainbow trout
متن کامل
[Autochthonous probiotics in prevention of infectious and inflammatory diseases of a human in the altered habitats].
Dysbiotic shifts in intestinal and pharyngeal microflora were studied in 22 normal volunteers in 9-, 14-, 105- and 520-d chamber experiments simulating some of the spaceflight factors. Two preparations were administered to prevent pharyngeal and intestinal dysbiosis: oral dry probiotic based on indigenous intestinal Enterococci and topical collagen-immobilized Lactobacterin based on indigenous ...
متن کامل