The gene annotated BAB2_1150 in the Brucella abortus 2308 genome sequence is predicted to encode a homolog of the well-characterized heme transporter ShuA of Shigella dysenteriae and accordingly has been given the designation bhuA (Brucella heme utilization). Phenotypic analysis of an isogenic bhuA mutant derived from B. abortus 2308 verified that there is a link between BhuA and the ability of...

The outer membrane proteins (OMPs) of Brucella (B.) abortus have been extensively studied, but their immunogenicity and protective ability against B. abortus infection are still unclear. In the present study, B. abortus Omp28, a group 3 antigen, was amplified by PCR and cloned into a maltose fusion protein expression system. Recombinant Omp28 (rOmp28) was expressed in Escherichia coli and was t...

Two-dimensional gel electrophoretic analysis of cell lysates from Brucella abortus 2308 and the isogenic hfq mutant Hfq3 revealed that the RNA binding protein Hfq (also known as host factor I or HF-I) is required for the optimal stationary phase production of the periplasmic Cu,Zn superoxide dismutase SodC. An isogenic sodC mutant, designated MEK2, was constructed from B. abortus 2308 by gene r...

Abortus adalah terhentinya kehamilan sebelum minggu ke 20 (dihitung dari hari pertama menstruasi terahir). Defenisi lain menyebutkan abortus pengeluaran hasil konsepsi dengan berat <500 gram. Frekuensi kematian Ibu 3 akibat spontan di Indonesia 10%-15% 5 juta setiap tahunnya Terdapat lima penyebab ibu terbesar yaitu perdarahan (30,1%), hipertensi dalam (26,9 %), infeksi (5,5 partus lama/mace...

brucella melitensis and brucella abortus are of the most important causes of brucellosis, an infectious disease which is transmitted either directly or indirectly including consuming unpasteurized dairy products. both strains are considered endemic in iran. common diagnostic methods such as bacteriologic cultures are difficult and time consuming regarding the bacteria. the aim of this study was...

Both CCL20 and human β-defensin 2 (hBD2) interact with the same membrane receptor and display chemotactic and antimicrobial activities. They are produced by airway epithelia in response to infectious agents and proinflammatory cytokines. Whereas Brucella spp. can infect humans through inhalation, their ability to induce CCL20 and hBD2 in lung cells is unknown. Here we show that B. abortus induc...

To explore the effects of the genetic background on the characteristics of wboA gene deletion rough mutants generated from different parent Brucella sp. strains, we constructed the rough-mutant strains Brucella melitensis 16 M-MB6, B. abortus 2308-SB6, B. abortus S19-RB6, and B. melitensis NI-NB6 and evaluated their survival, pathogenicity, and induced protective immunity in mice and sheep. In ...

Brucella abortus is an intracellular bacterial pathogen and an etiological agent of the zoonotic disease known as brucellosis. Brucellosis can be challenging to treat with conventional antibiotic therapies and, in some cases, may develop into a debilitating and life-threatening chronic illness. We used multiple independent assays of in vitro metabolism and intracellular replication to screen a ...

The Brucella abortus type IV secretion system (T4SS), encoded by the virB operon, is essential for establishing persistent infection in the murine reticuloendothelial system. To gain insight into the in vivo interactions mediated by the T4SS, we compared host responses elicited by B. abortus with those of an isogenic mutant in the virB operon. Mice infected with the B. abortus virB mutant elici...

La bacteria Clamydophila abortus, ocasiona el aborto y la muerte temprana de crías débiles en ganado caprino ovino. Su detección es compleja puede llevar a falsos negativos cuando ocurren reacciones cruzadas algunas las técnicas utilizadas. Por esta razón, objetivo este trabajo fue clonar expresar proteína MOMP Chlamydophila para usarse como antígeno diagnóstico enfermedad ocasionada por bacter...