Biomedical subjects

M I Gegundez

Publications and source records attributed to M I Gegundez.

3 recordsLinked to original sources

PubMed2005

Epidemiological study of Rickettsia typhi infection in two provinces of the north of Spain: analysis of sera from the general population and sheep.

Data relating to Rickettsia typhi infection in Spain are scarce. A serological survey of 383 serum samples (184 males, 199 females) from the general population and 120 sera from sheep were studied by immunofluorescence assay (IFA). The human serum samples were collected from the general population of Palencia and Burgos provinces, and sheep serum samples were collected from Palencia province. Of the 383 human serum samples studied, 29 were positive for antibodies against R. typhi (7.5%) No statistical differences were found according to age, sex, origin (rural vs. urban) or geographic distribution, but a significant difference was observed related to occupation. In addition, 69 serums were found positives for R. typhi in sheep samples (57.5%). Our results indicated the circulation of R. typhi infectious for humans and sheep in Palencia and Burgos provinces. This study indicates that sheep may be infected with R. typhi, and that animals can, therefore be used as indicators of the presence of this organism.

Adolescent↗

PubMed1995

Cutaneous tuberculosis: a clinical, histopathologic, and bacteriologic study.

BACKGROUND: In recent years cutaneous infections with Mycobacterium tuberculosis with an atypical clinical appearance have become more common because of the increasing number of immunocompromised patients. OBJECTIVE: We report the clinical, histopathologic, and bacteriologic data of 11 patients with several forms of cutaneous tuberculosis seen during the past 14 years. METHODS: Patients from whom M. tuberculosis was isolated from culture of skin biopsy specimens, sinus drainage, or material aspirated from cutaneous abscesses were included. In all but two patients a biopsy specimen was obtained for histopathologic study. All but one patient received combined antituberculous therapy. RESULTS: The clinical diagnoses were scrofuloderma (four cases), cutaneous miliary tuberculosis (two), lupus vulgaris (two), tuberculous gumma (two), and one unclassified. All but three patients had evidence of either previous or simultaneous tuberculous foci other than in the skin. Histopathologic findings varied according to the type of cutaneous tuberculosis. CONCLUSION: In some patients with cutaneous tuberculosis, lesions are atypical in appearance because of immunodeficiency. Culture for M. tuberculosis should be performed in all suspected cases, even in those in whom special stains for acid-fast bacilli are negative.

Abscess↗

PubMedDate not supplied

[Isolation of Mycobacterium tuberculosis with primary resistance to chemotherapeutic agents in patients with HIV infection].

BACKGROUND: To evaluate the resistance of Mycobacterium tuberculosis in subjects with simultaneous infection by the human immunodeficiency virus. METHODS: Isolation of Mycobacterium tuberculosis was carried out in a University hospital over a period of 7 years with selection of those corresponding to subjects with HIV infection. The isolation of Mycobacterium tuberculosis with resistance to one or more chemotherapeutic drugs was identified and is described herein. RESULTS: A total of 287 subjects were identified having tuberculous disease, 39 (13.59%) of them presented a simultaneous infection by the human immunodeficiency virus. In 4 of the latter (10.26%) Mycobacterium tuberculosis resistant to one or more chemotherapeutic drugs was isolated with the most frequent resistance being to isoniazide (3/4). CONCLUSIONS: A high degree of diagnostic suspicion must be maintained in patients with the human immunodeficiency virus with respect to tuberculosis, not only because of frequent endogenous activation but also because of the danger of in-hospital transmission. The possibility of resistance makes systematic antibiograms in these cases advisable. In these patients recommendations regarding treatment should be followed avoiding shortened or simplified therapeutic periods which have occasionally been demonstrated as ineffective.

Adult↗