A rare case of cervical abscess caused by Parvimonas micra

Cervical abscesses develop in the tissue spaces between the cervical fascia. The rapid expansion of these abscesses can lead to fatal outcomes. We describe a case of a deep cervical abscess caused by Parvimonas micra. He was referred to our department with complaints of sore throat and neck pain. Ultrasonography revealed a hypoechoic area in the cervical interfascicular space. An ultrasound-guided puncture was performed to collect pus for bacteriological examination. Subsequently, a contrast-enhanced computed tomography scan revealed a multi-focal abscess extending from the left mandible to the left side of the neck, without any mediastinal abscess. An emergency drainage and antibacterial therapies were performed, and the patient progressed well. Parvimonas micra, a gram-positive anaerobic bacterium, was detected in the pus collected before incision, and appropriate antibiotics were immediately administered. The collection of pus prior to incision and drainage aids accurate identification of the causative organism and appropriate treatment.

Polyaluminum Hydroxychloride Application in Neutral pH Rosin Sizing of Paper

ABSTRACTCommonly referred to as PAC, a series of polyhydroxide chlorides of aluminum with the general formula Aln(OH)mCl3n−m are being increasingly used as rosin size bonding agents, drainage aids and retention aids in papermaking.The manufacturing route chosen, the process kinetics and degree of neutralization affect the product produced and its reactions in the paper-making system. Production methods and procedures for quantifying the products produced are described.Dispersed rosin size and PAC can be applied to a papermaking system operating at pH 6 to 7.3.Sizing specifications are met and paper with non-slip characteristics, good machine glaze surface and printability is produced.