Biomaterial Database

Quantitative assessment of bacterial invasion of chronic ulcers. Statistical analysis. 1983

M Schneider, and C W Vildozola, and S Brooks

Seventy-four bacterial counts were performed on tissue specimens taken from seven chronic decubitus ulcers and two infected postoperative wounds to evaluate the reliability of a single determination as an indicator of the degree of bacterial contamination of the wound. Two methods of tissue sampling were compared. In Group I, a single tissue sample was divided into four specimens, which were then individually processed. In Group II, bacterial counts were made on tissue specimens taken from four widely separated areas of the wound. Data from 37 determinations were available in each group. The 95 percent confidence interval for a single determination was log10 +/- 0.9 for Group I and log10 +/- 1.3 for Group II. We conclude that the range of values at the 95 percent confidence interval is so large that a bacterial count made on a single tissue sample from a chronic ulcer has only limited value as a guide to the surgeon in determining the optimal time required to perform a surgical closure.

UI	MeSH Term	Description	Entries
D002908	Chronic Disease	Diseases which have one or more of the following characteristics: they are permanent, leave residual disability, are caused by nonreversible pathological alteration, require special training of the patient for rehabilitation, or may be expected to require a long period of supervision, observation, or care (Dictionary of Health Services Management, 2d ed). For epidemiological studies chronic disease often includes HEART DISEASES; STROKE; CANCER; and diabetes (DIABETES MELLITUS, TYPE 2).	Chronic Condition,Chronic Illness,Chronically Ill,Chronic Conditions,Chronic Diseases,Chronic Illnesses,Condition, Chronic,Disease, Chronic,Illness, Chronic
D003668	Pressure Ulcer	An ulceration caused by prolonged pressure on the SKIN and TISSUES when one stays in one position for a long period of time, such as lying in bed. The bony areas of the body are the most frequently affected sites which become ischemic (ISCHEMIA) under sustained and constant pressure.	Bedsore,Decubitus Sore,Decubitus Ulcer,Pressure Injury,Pressure Sore,Bed Sores,Bed Sore,Bedsores,Decubitus Sores,Decubitus Ulcers,Injury, Pressure,Pressure Injuries,Pressure Sores,Pressure Ulcers,Sore, Bed,Sore, Decubitus,Sore, Pressure,Ulcer, Decubitus,Ulcer, Pressure
D006801	Humans	Members of the species Homo sapiens.	Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D001419	Bacteria	One of the three domains of life (the others being Eukarya and ARCHAEA), also called Eubacteria. They are unicellular prokaryotic microorganisms which generally possess rigid cell walls, multiply by cell division, and exhibit three principal forms: round or coccal, rodlike or bacillary, and spiral or spirochetal. Bacteria can be classified by their response to OXYGEN: aerobic, anaerobic, or facultatively anaerobic; by the mode by which they obtain their energy: chemotrophy (via chemical reaction) or PHOTOTROPHY (via light reaction); for chemotrophs by their source of chemical energy: CHEMOLITHOTROPHY (from inorganic compounds) or chemoorganotrophy (from organic compounds); and by their source for CARBON; NITROGEN; etc.; HETEROTROPHY (from organic sources) or AUTOTROPHY (from CARBON DIOXIDE). They can also be classified by whether or not they stain (based on the structure of their CELL WALLS) with CRYSTAL VIOLET dye: gram-negative or gram-positive.	Eubacteria
D001431	Bacteriological Techniques	Techniques used in studying bacteria.	Bacteriologic Technic,Bacteriologic Technics,Bacteriologic Techniques,Bacteriological Technique,Technic, Bacteriological,Technics, Bacteriological,Technique, Bacteriological,Techniques, Bacteriological,Bacteriologic Technique,Bacteriological Technic,Bacteriological Technics,Technic, Bacteriologic,Technics, Bacteriologic,Technique, Bacteriologic,Techniques, Bacteriologic
D012883	Skin Ulcer	An ULCER of the skin and underlying tissues.	Skin Ulcers,Ulcer, Skin,Ulcers, Skin
D013530	Surgical Wound Infection	Infection occurring at the site of a surgical incision.	Postoperative Wound Infection,Infection, Postoperative Wound,Infection, Surgical Wound,Surgical Site Infection,Wound Infection, Postoperative,Wound Infection, Surgical,Infection, Surgical Site,Infections, Postoperative Wound,Infections, Surgical Site,Infections, Surgical Wound,Postoperative Wound Infections,Surgical Site Infections,Surgical Wound Infections,Wound Infections, Postoperative,Wound Infections, Surgical