Microbiologia

Antibacterial activity of vegetal extracts against serovars of Salmonella

“…This serovar is present only in avian species, while the others are adapted to several different hosts. Different susceptibility of the serovars is probably related to defense mechanisms, since it is well known that bacteria can develop protection mechanisms such as changes in the permeability and structure of the cell wall, production of inhibitory enzymes, and alteration of the molecules attacked by the antibacterial (TRABULSI & ALTHERTHUM, 2005).…”

“…This concern is based on the gradual reduction of the number of efficient antibiotics, and on the toxic effects of the antibiotic's residues in animal products (CHAGAS, 2004;TRABULSI & ALTHERTHUM, 2005). In this context, there has been increased interest in studies searching for vegetal compounds that present antibacterial activity.…”

“…Currently, there are 2,501 known serovars of Salmonella, some more restricted and adapted to a unique host, and others capable of infecting several species (FRANCO et al, 2005;TRABULSI & ALTHERTHUM, 2005).…”

“…The large numbers of serovars, the adaptation to several hosts, and the ability to acquire and transmit alleles of resistance to antimicrobials are some of the factors that contribute to the pathogenicity of Salmonella (TRABULSI & ALTHERTHUM, 2005). This picture requires control of the use of antimicrobials and research into new antimicrobials, with focus on human health and to reduce losses in animal production.…”

Bacteriological Hazards and Risks Associated With Seafood Consumption in Brazil

“…According to TRABULSI & ALTERTHUM 106 , the pathogenic diversity of E. coli is impressive. There are at least five categories which cause intestinal infection by different mechanisms in addition to categories associated with urinary infections, meningitis and other extraintestinal infections.…”