R M Vickers, V L Yu, S S Hanna, P Muraca, W Diven, N Carmen, F B Taylor
{"title":"Determinants of Legionella pneumophila contamination of water distribution systems: 15-hospital prospective study.","authors":"R M Vickers, V L Yu, S S Hanna, P Muraca, W Diven, N Carmen, F B Taylor","doi":"10.1017/s0195941700067412","DOIUrl":"https://doi.org/10.1017/s0195941700067412","url":null,"abstract":"<p><p>We conducted a prospective environmental study for Legionella pneumophila in 15 hospitals in Pennsylvania. Hot water tanks, cold water sites, faucets, and showerheads were surveyed four times over a one-year period. Sixty percent (9/15) of hospitals surveyed were contaminated with L pneumophila. Although contamination could not be linked to a specific municipal water supplier, most of the contaminated supplies came from rivers. Parameters found to be significantly associated with contamination included elevated hot water temperature, vertical configuration of the hot water tank, older tanks, and elevated calcium and magnesium concentrations of the water (P less than 0.05). This study suggests that L pneumophila contamination could be predicted based on design of the distribution system, as well as physicochemical characteristics of the water.</p>","PeriodicalId":77726,"journal":{"name":"Infection control : IC","volume":"8 9","pages":"357-63"},"PeriodicalIF":0.0,"publicationDate":"1987-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1017/s0195941700067412","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"14774607","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Nosocomial transmission of hepatitis A in an adult population.","authors":"R Baptiste, D Koziol, D K Henderson","doi":"10.1017/s0195941700067424","DOIUrl":"https://doi.org/10.1017/s0195941700067424","url":null,"abstract":"<p><p>Nosocomial transmission of hepatitis A from patients to staff members is an unusual event. Recently, several cases of occupational transmission of hepatitis A to health care workers have been reported in the literature. Most of these have occurred as a result of transmission from an infected child to a staff member involved in his or her care. We report an additional case of transmission of hepatitis A from an infected adult to a staff member and review the literature regarding nosocomial hepatitis A transmission. The review emphasizes several points that nearly all instances of nosocomial transmission of hepatitis A have in common, including the role of asymptomatic infection, the timing of hospitalization, and the fact that index patients often have an underlying illness that obscures the early diagnosis of hepatitis A. In addition, several other areas of controversy with respect to hepatitis A are discussed.</p>","PeriodicalId":77726,"journal":{"name":"Infection control : IC","volume":"8 9","pages":"364-70"},"PeriodicalIF":0.0,"publicationDate":"1987-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1017/s0195941700067424","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"14774608","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Quantity of soap as a variable in handwashing.","authors":"E L Larson, P I Eke, M P Wilder, B E Laughon","doi":"10.1017/s0195941700067436","DOIUrl":"https://doi.org/10.1017/s0195941700067436","url":null,"abstract":"<p><p>The purposes of this study were to assess the effect of two quantities (1 mL or 3 mL) of four different handwashing products on reductions in log colony-forming units (CFU) from the hands and to determine the amount of liquid soap used for handwashing by personnel in one hospital. First, 40 subjects were assigned by block randomization to one of four handwashing products (4% chlorhexidine gluconate in a detergent base, two alcohol hand rinses, and a liquid, nonantimicrobial soap) to be used in either 1 mL or 3 mL amounts per wash. Each subject washed his or her hands 15 times per day for five days. After one and five days of handwashing there were significant reductions over baseline in log CFU between handwashing products (P less than 0.001). Additionally, subjects using 3 mL of antiseptic soap had significantly greater reductions in log CFU than those using 1 mL (P less than 0.001). Among subjects using control liquid soap there was no such dose response. Second, a survey of 47 members of a hospital nursing staff from nine specialty areas and ten individuals in the general population was conducted to measure amounts of two liquid soaps used for handwashing. Amount of soap ranged from 0.4 to 9 mL per handwash. Personnel working in clinical areas where patients were at high risk for nosocomial infection used significantly more soap than did others (P less than 0.05). We conclude that quantity of soap used for handwashing is one variable influencing the microbial counts on hands, and that the quantity of soap used by health care personnel varies considerably.</p>","PeriodicalId":77726,"journal":{"name":"Infection control : IC","volume":"8 9","pages":"371-5"},"PeriodicalIF":0.0,"publicationDate":"1987-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1017/s0195941700067436","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"14774609","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Tuberculosis screening in the long-term care setting.","authors":"L E Price, W A Rutala","doi":"10.1017/s0195941700067400","DOIUrl":"https://doi.org/10.1017/s0195941700067400","url":null,"abstract":"<p><p>Tuberculosis (TB) skin-testing practices in long-term care facilities (LTCFs) in North Carolina (NC) were assessed from a 56% (148/263) response to a comprehensive TB screening questionnaire. TB skin tests were administered to employees on initial employment by 98% and annually by 97% of the LTCFs, generally (74%) by the Mantoux method. Employee skin tests were read at the appropriate time interval of 48 to 72 hours by 91%, but less than half used diameter of induration when interpreting reactive tests. The booster test was performed on new employees at eight (6%) of the LTCFs. TB skin tests were routinely performed on newly admitted residents by 56% or conditionally required by 18%, generally (73%) by the Mantoux method. Resident skin tests were read at the appropriate time interval of 48 to 72 hours by 92%, but again only half correctly interpreted reactive tests as significant. Residents received routine annual skin tests at 71% of the LTCFs, generally (80%) by the Mantoux method. Eight (6%) facilities routinely performed the booster test on newly admitted residents. TB infection prevalence in new employees during 1983 was 8.1% (47/578) in seven LTCFs and in newly admitted residents was 6.4% (7/110) in three LTCFs supplying this data. The five-year mean TB skin test conversion rate among employees was 1.1% (101/9545) in 12 LTCFs and among residents was 0.9% (46/5216) in nine LTCFs supplying this data. Lack of compliance to established TB skin-testing guidelines in NC LTCF was prevalent. In recognition of described endemic and epidemic spread of TB in LTCFs, residents and employees of LTCFs should be screened for TB utilizing established skin-testing practices.</p>","PeriodicalId":77726,"journal":{"name":"Infection control : IC","volume":"8 9","pages":"353-6"},"PeriodicalIF":0.0,"publicationDate":"1987-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1017/s0195941700067400","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"14248281","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Gurevich Inge, Tafuro Patricia, and Cunha Burke A. (eds) The Theory and Practice of Infection Control New York, Praeger Publishers1984, 421 pages","authors":"Karen Hadley","doi":"10.1017/S0195941700067473","DOIUrl":"https://doi.org/10.1017/S0195941700067473","url":null,"abstract":"","PeriodicalId":77726,"journal":{"name":"Infection control : IC","volume":"55 1","pages":"386 - 386"},"PeriodicalIF":0.0,"publicationDate":"1987-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1017/S0195941700067473","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"57196356","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Flash sterilization: carefully measured haste.","authors":"D G Maki, C A Hassemer","doi":"10.1017/s0195941700066388","DOIUrl":"https://doi.org/10.1017/s0195941700066388","url":null,"abstract":"","PeriodicalId":77726,"journal":{"name":"Infection control : IC","volume":"8 8","pages":"307-10"},"PeriodicalIF":0.0,"publicationDate":"1987-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1017/s0195941700066388","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"14436205","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"An evaluation of three biological indicator systems in flash sterilization.","authors":"H R Kotilainen, N M Gantz","doi":"10.1017/s019594170006639x","DOIUrl":"https://doi.org/10.1017/s019594170006639x","url":null,"abstract":"<p><p>An evaluation of two flash-sterilization-specific biological indicators (BI) and a traditional spore strip indicator was performed to assess sensitivity and reliability as reflected in survive/kill ratios. The BIs tested included: 3M's Attest #1261, Amsco's Proof Flash, and Castle Tec Test. Survival after \"come-up\" time alone, (0 exposure) and one-, two-, and three-minute exposures at 273 degrees F in a gravity displacement sterilizer was measured by media color change or turbidity after incubation at 55 degrees C. Each cycle was replicated three times on two separate days with six of each BI per run. Positive BIs were subcultured as necessary. Proof Flash presented technical difficulties due to incomplete or impossible crushing of media vials, unexpected media color changes, and evaporation of media. Tec Test was not sufficiently resistant as survivors were not detected at any exposure time. The Attest had 100% survival at zero and one-minute exposures and 94% survival after the two-minute exposure. No survivors were detected after the three-minute exposure. Although each institution should evaluate BIs for their own use independently, the data indicate that Attest #1261 monitored the three-minute flash cycles more satisfactorily than the other BIs tested.</p>","PeriodicalId":77726,"journal":{"name":"Infection control : IC","volume":"8 8","pages":"311-6"},"PeriodicalIF":0.0,"publicationDate":"1987-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1017/s019594170006639x","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"14248280","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}