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Showing 1 to 10 of 10 for “"Histophilus somni"”.
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Towards Novel Methods of Mutagenesis for Histophilus somni
Histophilus somni is an etiologic agent of shipping fever pneumonia, myocarditis, and other systemic diseases in bovines, although nonpathogenic commensal strains also exist. Virulence factors that have been identified in H. somni include biofilm formation, lipooligosaccharide phase variation, …
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Comparative and Functional Genomic Studies of Histophilus somni (Haemophilus somnus)
Histophilus somni is a commensal of the mucosal surfaces of respiratory and reproductive tracts of cattle and sheep. However, as an opportunistic pathogen, H. somni can cause diseases such as pneumonia, myocarditis, abortion, arthritis, and meningo-encephalitis. Previously, several virulence …
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An Investigation of Histophilus somni Virulence Factors in Pathogenesis and Diagnosis
H. somni is capable of forming a prominent biofilm, and luxS is known to play an important role in biofilm formation through quorum sensing, but has also been postulated to function in gene regulation. In order to further study the function of H. somni LuxS, mutants 2336::TnluxS and 2336::TnuspE …
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Effect of Sialylation of Histophilus somni Lipooligosaccharide on Virulence and Resistance to Host Defenses
… study, we assessed the effect of sialylation of Histophilus somni LOS on complement-mediated killing, binding of complement factor H (which converts C3b to inactive C3b (iC3b) and inhibit the alternative complement pathway) to the bacteria, complement activation by the LOS, and phagocytosis and …
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The Molecular Characterization of Phosphorylcholine (ChoP) on Histophilus somni Lipooligosaccharide: Contribution of ChoP to Bacterial Virulence and Pathogenesis
Histophilus somni virulence factors include expression and antigenic variation of lipooligosaccharide (LOS). Phosphorylcholine (ChoP) is often expressed on H. somni LOS and also undergoes antigenic variation. In this study, five genes that play a role in expression and antigenic variation of ChoP, …
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Pasteurella multocida biofilm formation, and the interrelationship of P. multocida with Histophilus somni in a polymicrobial biofilm during bovine respiratory disease
… for CPS production in P. multocida serogroup A. Histophilus somni and Pasteurella multocida cause bovine respiratory disease (BRD) and systemic infections in cattle. Following respiratory infection of calves with H. somni, P. multocida is also often isolated from the lower respiratory tract. …
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Fic-Mediated AMPylation in Bacterial Infection and Endoplasmic Reticulum Stress
… these are VopS (Vibrio parahaemolyticus), IbpA (Histophilus somni) and DrrA (Legionella pneumophila). The discovery of SidD, a deAMPylator also from L. pneumophila, shows that this modification is dynamic and could likely have a regulatory role in eukaryotic biology. Supporting this idea is the …
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Investigation of Haemophilus somnus Virulence Factors: Lipooligosaccharide Sialylation and Inhibition of Superoxide Anion Production
… opportunistic pathogen Haemophilus somnus (Histophilus somni) cause multi-systemic diseases in cattle. One of the reported virulence factors that H. somnus may use to persist in the host is resistance to intracellular killing. It is reported in this dissertation that H. somnus significantly …
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Análise metagenômica da comunidade bacteriana de vacas com distúrbios reprodutivos.
… emerge, such as Pasteurellaceae, which species Histophilus somni is a known opportunistic cattle pathogen causing diseases in the respiratory, genital, nervous and circulatory systems. Arcanobacterium pyogenes, another pathogenic species with well studied ecologic relationships, Prevotella, …
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Increases in Cortisol due to Weaning Stress and the Subsequent Alterations to Immune Function in Beef Calves
… their dam at day 0. Calves were vaccinated with Histophilus somni on day 1. Blood samples were taken at day -6, 1, 3, 8, 15, and 22. Fecal samples were taken on day -7, -6, 1 and 3. All calves were weighed on day -7, 0, 8, and 22. Serum samples were analyzed for IgG1 and IgG2 specific-H. somni …