RESUMO
OBJECTIVE: To study the genotype distributions and epidemiological characteristics of Yersinia pestis in Gansu province. METHODS: Primers were designed according to the confirmed 23 differential sections, to genotype the 202 Yersinia pestis DNA of Gansu province by PCR, and to analyze its distribution and epidemiological characteristics. RESULTS: Yersinia pestis in Gansu province could be divided into eight genotypes: 1b, 5, 7, 8, 13, 26, new genotype 1 (GS1) and new genotype 2 (GS2). They were distributed in various regions. 1b, 8 and GS1 genotypes of Yersinia pestis had been identified since 1960s but the 7, 13 and 26 genotypes had not been isolated for more than 40 years while GS2 and 5 genotypes had been isolated since 1990s. CONCLUSION: 1b, 8 and GS1 genotypes of Yersinia pestis continued to be violently prevalent since 1960s but 7, 13 and 26 genotypes had not been isolated for more than 40 years while GS2 and 5 genotypes had started to be popular since 1990s.
Assuntos
Peste/epidemiologia , Peste/microbiologia , Yersinia pestis/genética , Animais , China/epidemiologia , Primers do DNA , Variação Genética , Genoma Bacteriano , Genótipo , Humanos , Yersinia pestis/isolamento & purificaçãoRESUMO
BACKGROUND: Congenital pulmonary lymphangiectasis (CPL) characterized by dilatation of pulmonary lymphatic vessels occurs as a congenital anomaly. With poor prognosis, neonatal presentation of bilateral CPL is associated with the severe compromise of pulmonary gas exchange and high mortality. METHODS: A male infant born at 39 weeks of gestation was found to have CPL. Cyanosis and cardiac arrest occurred a few minutes after birth, and the symptoms remained after artificial ventilation. The infant died of hypoxemic cardiac failure 45 minutes after birth. Autopsy showed neither pleural effusion nor valvular abnormalities. RESULTS: Microscopically dilated vessels with lymphatics were seen in the lung of the infant. Atelectasis, CPL, inhalation of amniotic fluid, partial hydropic degeneration of hepatic cells, and scrotal edema were diagnosed. CONCLUSION: With regard to treatment and prognosis, CPL must be distinguished from interstitial emphysema and other diseases.
