[A primary investigation on disseminated histoplasmosis in Hubei].
OBJECTIVE
To investigate the epidemiologic features of disseminated histoplasmosis (PDH) in Hubei province.


METHODS
Bone marrow smears of 12 patients diagnosed as Kala-azer in Hubei province including 4 patients in Jingsan, 2 patients in Shashi and each 1 in Yichang, Jinmen, Zhongxiang, Luotian, Xianning and Guanghua respectively were re-examed under microscope. Peripheral blood and bone marrow smears of several patients were detected. After inoculated the bone marrow, peripheral blood, liver and spleen tissue of patients in MLI, the single colony was trans-inoculated in BHIB, SDA and CMA and incubated at 25 degrees C and 35 degrees C. Bone marrow, peripheral blood and bacterial fluid of yeast-phase Histoplasma capsulatum (H.cap) were injected into the abdominal cavity of Kunming mice and nude mice. When symptoms and signs developed, the spleen tissue was separated, then observed under microscope and cultured. Mycelium-phase and Yeast-phase H.cap were inoculated in urase and gelatin medium, then incubated at 25 degrees C and 35 degrees C. Histoplasmin was injected subcutaneously into patients, and then followed for 48 - 72 hours. Amphotericin B was selected to treat the PDH patients.


RESULTS
Moriform cell cluster and sausage-shaped cell were not observed in mononuclear-macrophages in the bone marrow smears from 12 patients. Leishman-Donovan body was found only in one patient. There wasn't kinetoplast in the cellular plasm of spores in 11 patients and no transeptae was found. The reaction of H.cap to urease was positive and H.cap did not liquefy the gelatin. It appeared to be mycelium-phase at 25 degrees C but no penicillus and catenulate conidia was found. The characteristic denticle macroconidia was observed but produced red coloring matter. It also appeared to be yeast-phase at 35 degrees C. Yeast-phase spores were observed under microscope. No sausage-shaped spore and transeptae were identified. H.cap could be acquired in the spleen tissue in Kunming mice and nude mice. Bacterium forms, characteristics under microscope and biochemical reaction of mycelium-phase and yeast-phase H.cap were different from some other kinds of dimorphic fungi such as Penicillium marneffei and Histoplasm duboisii etc.


CONCLUSIONS
There were scattered epidemics of PDH in Hubei province. The detection rate of PDH was higher in the southeast area then in the northwest area. The golden standards of clinic diagnosis were mycological culture and inoculation to animals. Amphotericin B was necommended as the first choice for treatment.
Li
Xia
X
The Clinic Laboratory of Zhongnan Hospital of Wuhan University, Wuhan 430071, China.
Li
Jie
J
Feng
Guo-qin
GQ
Gui
Xi-en
XE
Zeng
Xian-chang
XC
D000293:Adolescent; D000328:Adult; D000666:Amphotericin B / Q000627:therapeutic use; D000818:Animals; D000935:Antifungal Agents / Q000627:therapeutic use; D002681:China / Q000453:epidemiology; D005260:Female; D006658:Histoplasma / Q000302:isolation & purification*; D006659:Histoplasmin / Q000276:immunology; D006660:Histoplasmosis / Q000188:drug therapy / Q000453:epidemiology / Q000382:microbiology*; D006801:Humans; D008297:Male; D051379:Mice; D008819:Mice, Nude; D008875:Middle Aged; D012882:Skin Tests
D000935:Antifungal Agents; D000666:Amphotericin B; D006659:Histoplasmin