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[Cryptococcus neoformans chemotyping. Review of the literature. New epidemiologic data on cryptococcosis. Our experience with the use of C.G.B. media in the study of this yeast].
Rev Inst Med Trop Sao Paulo. 1993 Sep-Oct; 35(5):469-78.RI

Abstract

The purpose of this work was to collect the main information from the literature about the biotyping of Cryptococcus neoformans. The more up-to date research concerning the epidemiology of cryptococcosis comprising quite a few articles, mainly after the advent of AIDS, was also reviewed. The Cryptococcus neoformans varieties neoformans and gattii are well defined biochemically nowadays chiefly through the C.G.B. medium, according to Kwon-Chung et al. (1982). The isolation of C. neoformans var. gattii from flowers and leaves of Eucalyptus camaldulensis and Eucalyptus tereticornis, specially in Australia, through the works of Ellis & Pfeiffer (1990) and Pfeiffer & Ellis (1992) permitted very interesting epidemiological investigations on C. neoformans, a capsulated yeast by which Sanfelice, in Italy (1894; 1895) attracted attention of medical class. Busse, in 1894, described the first human case of cryptococcosis under the presentation of a bone lesion simulating sarcoma. In this paper, the Brazilian researchers focused on this subject were pointed out, followed by the Author's experience with the C.G.B. medium (L-canavanine, glycine and bromothymol blue) proposed by Kwon-Chung et al. (1982) with very good results. It was possible with such medium the study of 50 C.N.S. liquor samples, being 39 from AIDS patients (78%) and 11 from non-AIDS ones (22%). Thirty-seven out of the 39 HIV-positive patients (74%) were identified as C. neoformans var. gattii. From the negative HIV, 8 (16%) were classified as C. neoformans var. neoformans and 3 (6%) as C. neoformans var. gattii. We could not perform the serotyping of the above referred samples. It is evident anyway that in Brazil there exist both varieties gattii and neoformans, agents of neurocryptococcosis, including AIDS patients. The importance of neurocryptococcosis, mainly among AIDS patients, is stressed here, showing once more the value of C.G.B. medium in the typing of C. neoformans in its two varieties. Also, it is of relevant importance the demonstration that some species of eucalyptus may act as "host-trees" of C. neoformans var. gattii.

Authors+Show Affiliations

Instituto de Medicina Tropical de São Paulo (Laboratório de Micologia Médica), Brasil.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Review

Language

por

PubMed ID

8115818

Citation

de Melo, N T., et al. "[Cryptococcus Neoformans Chemotyping. Review of the Literature. New Epidemiologic Data On Cryptococcosis. Our Experience With the Use of C.G.B. Media in the Study of This Yeast]." Revista Do Instituto De Medicina Tropical De Sao Paulo, vol. 35, no. 5, 1993, pp. 469-78.
de Melo NT, Lacaz Cda S, Charbel CE, et al. [Cryptococcus neoformans chemotyping. Review of the literature. New epidemiologic data on cryptococcosis. Our experience with the use of C.G.B. media in the study of this yeast]. Rev Inst Med Trop Sao Paulo. 1993;35(5):469-78.
de Melo, N. T., Lacaz, C. d. a. . S., Charbel, C. E., Pereira, A. D., Heins-Vaccari, E. M., França-Netto, A. S., Machado, L. d. o. s. . R., & Livramento, J. A. (1993). [Cryptococcus neoformans chemotyping. Review of the literature. New epidemiologic data on cryptococcosis. Our experience with the use of C.G.B. media in the study of this yeast]. Revista Do Instituto De Medicina Tropical De Sao Paulo, 35(5), 469-78.
de Melo NT, et al. [Cryptococcus Neoformans Chemotyping. Review of the Literature. New Epidemiologic Data On Cryptococcosis. Our Experience With the Use of C.G.B. Media in the Study of This Yeast]. Rev Inst Med Trop Sao Paulo. 1993 Sep-Oct;35(5):469-78. PubMed PMID: 8115818.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - [Cryptococcus neoformans chemotyping. Review of the literature. New epidemiologic data on cryptococcosis. Our experience with the use of C.G.B. media in the study of this yeast]. AU - de Melo,N T, AU - Lacaz,C da S, AU - Charbel,C E, AU - Pereira,A D, AU - Heins-Vaccari,E M, AU - França-Netto,A S, AU - Machado,L dos R, AU - Livramento,J A, PY - 1993/9/1/pubmed PY - 1993/9/1/medline PY - 1993/9/1/entrez SP - 469 EP - 78 JF - Revista do Instituto de Medicina Tropical de Sao Paulo JO - Rev Inst Med Trop Sao Paulo VL - 35 IS - 5 N2 - The purpose of this work was to collect the main information from the literature about the biotyping of Cryptococcus neoformans. The more up-to date research concerning the epidemiology of cryptococcosis comprising quite a few articles, mainly after the advent of AIDS, was also reviewed. The Cryptococcus neoformans varieties neoformans and gattii are well defined biochemically nowadays chiefly through the C.G.B. medium, according to Kwon-Chung et al. (1982). The isolation of C. neoformans var. gattii from flowers and leaves of Eucalyptus camaldulensis and Eucalyptus tereticornis, specially in Australia, through the works of Ellis & Pfeiffer (1990) and Pfeiffer & Ellis (1992) permitted very interesting epidemiological investigations on C. neoformans, a capsulated yeast by which Sanfelice, in Italy (1894; 1895) attracted attention of medical class. Busse, in 1894, described the first human case of cryptococcosis under the presentation of a bone lesion simulating sarcoma. In this paper, the Brazilian researchers focused on this subject were pointed out, followed by the Author's experience with the C.G.B. medium (L-canavanine, glycine and bromothymol blue) proposed by Kwon-Chung et al. (1982) with very good results. It was possible with such medium the study of 50 C.N.S. liquor samples, being 39 from AIDS patients (78%) and 11 from non-AIDS ones (22%). Thirty-seven out of the 39 HIV-positive patients (74%) were identified as C. neoformans var. gattii. From the negative HIV, 8 (16%) were classified as C. neoformans var. neoformans and 3 (6%) as C. neoformans var. gattii. We could not perform the serotyping of the above referred samples. It is evident anyway that in Brazil there exist both varieties gattii and neoformans, agents of neurocryptococcosis, including AIDS patients. The importance of neurocryptococcosis, mainly among AIDS patients, is stressed here, showing once more the value of C.G.B. medium in the typing of C. neoformans in its two varieties. Also, it is of relevant importance the demonstration that some species of eucalyptus may act as "host-trees" of C. neoformans var. gattii. SN - 0036-4665 UR - https://www.unboundmedicine.com/medline/citation/8115818/[Cryptococcus_neoformans_chemotyping__Review_of_the_literature__New_epidemiologic_data_on_cryptococcosis__Our_experience_with_the_use_of_C_G_B__media_in_the_study_of_this_yeast]_ DB - PRIME DP - Unbound Medicine ER -