streptococcus agalactiae , s. dysgalactiae and s. uberis are gram-positive bacterial pathogens that affect cows in dairy herds. these are considered as the major causes of economic losses of dairy producers without a control program. to reveal the role of these agents in inducing subclinical mastitis in dairy cattle in ahvaz, 100 cmt-positive milk samples and 20 cmt-negative milk samples were c...

A total of 303 young children with acute respiratory tract illnesses were examined for viral and bacterial agents. The isolation of Haemophilus influenzae from 58 (19.1%) of the children was described in relation to respiratory viruses and other bacterial agents isolated at the same time. H. influenzae was isolated alone in 24 instances. Streptococcus pneumoniae and respiratory syncytial virus ...

BACKGROUND Pasteurella multocida, Mannheimia haemolytica, Histophilus somni and Trueperella pyogenes are four bacterial agents commonly associated with bovine respiratory disease (BRD). In this study a bacterial multiplex real-time PCR (the RespoCheck PCR) was evaluated for the detection in bronchoalveolar lavage fluid (BALF) of these four bacterial agents. RESULTS The analytical sensitivity ...

Objective Conjunctivitis is a common disease in neonates. Several bacterial and viral infectious agents may cause it. Tear circulation and blinking has protective effects from bacterial colonization in the conjuntival sac. Reduced blinking increases the possibility of bacterial conjunctivitis. We studied the effect of eye patches on bacterial colonization of the conjunctival sac.  Methods In 1...

A series of potent antibacterial agents have been prepared. These agents are penems carrying a lactone ring in the C-2 position. Excellent activity against Gram-positive and Gram-negative organisms--except Pseudomonas aeruginosa--was found.

Fused polyheterocyclic derivatives are available by annulation of a tetramate scaffold, and been shown to have antibacterial activity against a Gram-negative, but not a Gram-positive, bacterial strain. While the activity is not potent, these systems are structurally novel showing, in particular, a high level of polarity, and offer potential for the optimization of antibacterial activity.

An efficient synthesis of two new N-acetyl-4'-arylphenylalanines is described together with their incorporation into a number of cationic peptoid antibacterial agents, one of which had an MIC of 7.8 microg/mL against Staphylococcus aureus.

Infectious diseases caused by bacterial pathogens represent a serious public health concern. Antimicrobial agents such as anti-bacterial drugs are often indicated for chemotherapy of bacterial infections in clinical medicine. Thus, it is important to study the biological mechanisms that confer bacterial pathogenesis and virulence. Under selective evolutionary pressure when in the presence of an...

To our knowledge, previous population-based surveys have not assessed misconceptions about antibacterial drug use over time. We documented a 26.3% decline in a key misconception in California women in 2003 compared to 2000; declines varied significantly by education level. Educational campaigns specifically designed to influence important subpopulations are needed.