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Biomedical subjects

R Henley

Publications and source records attributed to R Henley.

25 records · Page 2Linked to original sources
PubMed1984

Typhoid fever in San Antonio, Texas: an outbreak traced to a continuing source.

Eighty cases of typhoid fever occurred in San Antonio, Texas, with dates of onset from August 18, 1981, to October 26, 1981. Preliminary epidemiological investigations of the first 24 cases suggested a Mexican food takeout restaurant as the common source. A case-control study confirmed this association (P less than or equal to .001). Barbacoa , a mixture of muscle, lips, ears, tongue, and eyes from steamed bovine heads, was identified as the source of Salmonella typhi (P = .03). S typhi was cultured from the stool of one of 31 restaurant employees. Closure of the restaurant resulted in termination of the outbreak within a single incubation period. The restaurant was allowed to reopen after the remaining employees had demonstrated lack of excretion of S typhi in stools. This outbreak represents the largest restaurant-associated typhoid fever outbreak reported in the United States in greater than 50 years.

Adolescent↗
PubMedDate not supplied

The enhancement of iron-dependent luminol peroxidation by 2,2'-dipyridyl and nitrilotriacetate.

The generation of radicals from luminol and H2O2, in the presence of iron and iron chelates was monitored by measuring the chemiluminescence produced by further oxidation of these radicals. 2,2'-Dipyridyl enhanced the production of chemiluminescence in the presence of FeSO4, ferritin and haemosiderin but not FeCl3 or horseradish peroxidase. Nitrilotriacetic acid (NTA) enhanced chemiluminescence in the presence of both FeSO4 and FeCl3 but not ferritin or haemosiderin. The enhancement of chemiluminescence by iron chelation may have analytical applications and the process by which these iron chelates are able to generate radicals from the nitrogenous base luminol may be similar to that responsible for their toxic effects on DNA.

2,2'-Dipyridyl↗
PubMedDate not supplied

The clinical value of serum prolactin measurement in the differential diagnosis of complex partial seizures.

The time course of changes in serum prolactin after complex partial seizures has been determined and compared to similar changes after other types of seizure and non-epileptic attacks. Seizures in 33 subjects were recorded on video EEG telemetry. Peak serum prolactin concentrations occurred 15-20 min after tonic-clonic seizures, 10 min after complex partial seizures, and were highest after generalised tonic-clonic seizures. Serum prolactin concentrations remained less than 1000 mU/l after absences and non-epileptic attacks. Application of Bayes' theorem showed that where serum prolactin was greater than 1000 mU/l 5-10 min post event this would identify genuine tonic-clonic or complex partial seizures. The false negative rate of this test was 9% for tonic-clonic seizures and 38% for complex partial seizures. Failure of serum prolactin to rise after an attack is of little value in distinguishing complex partial seizures from non-epileptic attacks.

Adolescent↗