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Biomedical subjects

M A Jackson

Publications and source records attributed to M A Jackson.

At least 127 records · Page 7Linked to original sources
PubMed1975

Epidemiologic association between Gonorrhea and prostatic carcinoma.

The curves for death rates from prostatic cancer and gonorrhea incidence rates in Denmark, over a span of thirty years, matched well with a lag period of forty-five years. Moreover, a retrospective study conducted in the United States involving 75 cancer patients and 75 age-matched controls demonstrated a statistically significant association between gonorrheal infection and subsequent development of prostatic carcinoma. Two postulates are presented: the viral-venereal and the chronic infection theories. The recent increase in incidence of prostatic cancer in the United States could be the beginning of an epidemic in which astronomically high rates may be reached.

Adolescent↗
PubMed1975

Intestinal polyps in American negroes and Nigerian africans.

Forty Africans from Nigeria and 89 American negroes with colorectal polyps were analysed by age, sex and type of polyp. The Nigerians were much the younger group (mostly under 20 years of age, whereas most of the American negroes were over 50) and far fewer of their polyps were truly neoplastic (7.5% compared with 87% of the Americans). These differences may be partly due to the American negro population being older than the Nigerian, and partly to environmental factors like those previously postulated to account for the difference in colon cancer incidence between these populations.

Adolescent↗
PubMed1975

Malignant tumors in American black and Nigerian children: a comparative study.

Results of a study on the relative frequencies of tumors in American black and Nigerian children were compared with data from the Childhood Cancer Registries in Manchester, United Kingdom, and Kampala, Uganda. The American black child living in Washington, D.C. and the Caucasian child living in Manchester had similar high frequencies for leukemia and glioma, whereas the incidence of lymphoma and retinoblastoma was low. African children living in Nigeria or Uganda had the opposite frequency patterns. These differences in frequencies of tumors between two ethnologically related population groups, American black and Nigerian, suggested the influence of environmental factors in the etiology of these tumors, even though exposure to environmental carcinogens was short. The rarity of Ewing's sarcoma and testicular tumors in American black and Nigerian children suggested a genetic influence.

Adolescent↗
PubMedDate not supplied

Multisystem group A beta-hemolytic streptococcal disease in children.

Eight children (median age, 8 years; range, 3-11 years) with severe streptococcal infection and multisystem dysfunction are described. All were febrile and in a toxic condition at presentation, and five (62%) of eight required fluid resuscitation. Encephalopathic symptoms were prominent, and two of three examinations of cerebrospinal fluid revealed mild pleocytosis. Severe hyperesthesia with or without an erythematous rash occurred in four (50%) of eight patients. Hyponatremia had occurred in all patients. Musculoskeletal complaints were noted in seven (87%) of eight patients. Three had synovitis and three had soft tissue infection. Renal involvement was noted in all patients, and hepatopathy characterized by mild hyperbilirubinemia and elevated levels of liver transaminase was found in four of five patients. Prolonged fever was noted in children with occult infection and debridement or drainage procedures of the foci were required in three of five affected children. Given the diversity of clinical manifestations, a high index of suspicion is necessary if these patients are to be recognized and appropriate therapy initiated.

Child↗
PubMedDate not supplied

Pseudomonas aeruginosa septicemia in childhood cancer patients.

Twenty-three pediatric cancer patients developed Pseudomonas aeruginosa septicemia during an 11-year period. Typically the patients had advanced neoplasia and were receiving immunosuppressive therapy. Severe myelosuppression was almost always present and antibiotic therapy during the prior 2-week period for proven or suspected sepsis was common. Disruption of the skin and mucosa in the anogenital regions was evident in the majority of patients, and the gastrointestinal tract represented the most common portal of entry. Patients who developed sepsis while relapsed had the highest case-fatality rate, and use of synergistic antibiotic combinations did not affect outcome in this group.

Adolescent↗
PubMedDate not supplied

Relatively penicillin-resistant pneumococcal infections in pediatric patients.

Two hundred fifty-eight isolates of Streptococcus pneumoniae obtained from 232 infants and children at Children's Medical Center, Dallas, from November 1, 1981, to March 31, 1983, were screened for susceptibility to penicillin. On 1-microgram oxacillin disks 21 strains (8%) had zones of inhibition of 17 mm or less, and the tube-dilution minimal inhibitory concentrations of penicillin were from 0.125 to 0.5 micrograms/ml. These strains were designated as relatively resistant S. pneumoniae (RRSP). Prior therapy with a beta-lactam agent had occurred in 56% of patients with RRSP disease compared with 14% of randomly selected children with infections due to susceptible strains of S. pneumoniae (P = 0.009). Fifteen children (6%) had diseases due to RRSP ranging from sepsis or meningitis to otitis media or conjunctivitis. Four children, including the two patients with meningitis, had unsatisfactory responses to therapy with a beta-lactam antibiotic. Vancomycin or chloramphenicol is preferred for therapy of disease due to RRSP.

Anti-Bacterial Agents↗
PubMedDate not supplied

Non-neonatal infection due to Listeria monocytogenes.

In the period from 1969 through 1983, four cases of non-neonatal Listeria monocytogenes meningitis were encountered in Dallas, representing an incidence rate of 0.3%. Three cases occurring in immunocompetent patients are the subject of this report. A review of the literature since 1945 produced 87 cases of Listeria infections in patients who were from 2 months to 20 years of age. Of these, 54% occurred in immunocompetent persons. The case-fatality rate was 15% in the immunocompetent patients, compared with 42% in immunocompromised patients and with 35% in patients with other underlying illnesses. The diagnosis of listeriosis causes concern about the possibility of an underlying occult malignancy or disorder of T cell function, but on the basis of our review these underlying abnormalities are usually clinically apparent at the time of infection. A rational approach to the child with Listeria infection, who is not known to be a compromised host, would be to examine the history and patient carefully to consider documenting normal numbers of T lymphocytes and assessing delayed hypersensitivity by skin testing.

Adolescent↗