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Biomedical subjects

A M Ackley

Publications and source records attributed to A M Ackley.

8 recordsLinked to original sources

Posttraumatic Aeromonas hydrophila osteomyelitis.

Aeromonas hydrophila is a gram-negative organism that is the causative agent in several clinical infections. Although it has been reported to cause osteomyelitis in immunocompromised patients, it has not been reported to cause this in the normal host. We describe two patients in whom acute osteomyelitis developed following trauma in freshwater lakes. Cultures yielded A hydrophila, and both patients responded to a two-week course of parenteral antibiotics followed by oral tetracycline hydrochloride in the outpatient setting. Since A hydrophila is a common inhabitant of freshwater lakes, it should be suspected in infections occurring in this epidemiologic setting.

Adult↗

Legionnaires' disease: an update.

Legionella pneumophila is transmitted by aerosolization of water or dust from soil. There are six serotypes and four newly recognized related organisms. Sporadic cased of Legionnaires; disease are more common than epidemic case and are less likely to be suspected . Most reporters cases are characterized by severe pneumonia. Bacteriologic culture is the preferred method of diagnosis, but most cases are identified by the indirect fluorescent antibody method. Erythromycin is the drug of choice.

Adult↗

Prevalence of type B and non-A, non-B hepatitis in hemophilia: relationship to chronic liver disease.

To assess the relationship of liver dysfunction and hepatitis markers in hemophilic patients treated with factor VIII or IX concentrates, we studied 103 patients with hemophilia A and B for 6-36 mo. Elevated serum alanine aminotransferase was noted in 79% of the patients, with 51% of the patients showing persistent elevation for longer than 6 mo. Thirteen patients (12%) were HBsAg-positive, with 8 patients showing persistence of HBsAg and abnormal serum alanine aminotransferase for more than 6 mo. Overall, anti-HBs was detected in 77% of patients. Twelve episodes of acute hepatitis were documented in 10 patients during 36 mo. Six episodes were due to hepatitis B virus. The remaining 6 episodes were due to non-A, non-B hepatitis with negative HBsAg and absence of seroconversion to hepatitis B virus, hepatitis A virus, cytomegalovirus, and Epstein-Barr virus. In the six episodes of non-A, non-B hepatitis, the incubation period was less than 10 days in 3 patients and 30 days in 2 patients. In all cases with non-A, non-B hepatitis, the illness was symptomatic, but mild. Serum alanine aminotransferase returned to normal within 4 mo in 2 patients, but in 3 patients serum alanine aminotransferase persisted longer than 6 mo. One patient developed an acute B hepatitis 40 wk after non-A, non-B hepatitis. Thus, infection with the hepatitis B virus still remains prevalent as a cause of acute hepatitis in hemophiliacs receiving commercial factor concentrates, and accounts for chronic liver dysfunction in patients with persistent HBs antigenemia. In addition, acute non-A, non-B hepatitis, appears to be relatively common in hemophiliacs, and non-A, non-B virus may account for many cases of persistent liver dysfunction in these patients.

Acute Disease↗

The rapid diagnosis of infectious mononucleosis using an ELISA that detects IgM antibody to a peptide component of Epstein-Barr virus nuclear antigen.

An enzyme-linked immunosorbent assay (ELISA) that detects IgM antibody to a peptide component of the Epstein-Barr virus (EBV) nuclear antigen (EBNA-1) was compared with a conventional rapid heterophil antibody method for the rapid diagnosis of infectious mononucleosis. Discrepancies between the two methods were further analyzed using an indirect immunofluorescence assay to detect antibodies to EBV antigens. We evaluated 298 cases of suspected infectious mononucleosis. The ELISA was very sensitive (98.7%) and able to detect some cases (seven (9%) of 75 confirmed positives) that were negative by the rapid heterophil antibody test, but confirmed by immunofluorescence. However, approximately 17% of all positive tests could not be confirmed by EBV-specific immunofluorescence; thus, the overall positive predictive value was 83%; negative predictive value was 99.5%; and specificity was 93%. The high rate of false-positive tests makes this rapid ELISA unsuitable for the diagnosis of infectious mononucleosis.

Adolescent↗