Genotyping of Pneumocystis jirovecii isolates from Chinese HIV-infected patients based on nucleotide sequence variations in the internal transcribed spacer regions of rRNA genes.
Genetic diversity of Pneumocystis jirovecii isolates based on internal transcribed spacer (ITS) of the nuclear rRNA locus has previously been reported. The information about ITS genotype and epidemiology of this organism in Chinese human immunodeficiency virus-infected patients has not been available. In this study, 12 bronchoalveolar lavage fluid specimens obtained from HIV-infected patients were analyzed by PCR followed by cloning, sequencing and typing. Three ITS1 genotypes (E, B and 'H') and four ITS2 genotypes (b, g, i and r) as previously reported were identified, the most common of which were E, b and i. Five ITS haplotypes (Eg, Eb, Bi, Er and 'H'r) and 19 new combination types were also identified with the most common types being Eg (four of 12 patients, 10 of 60 clones), Eb (three of 12 patients, 11 of 60 clones) and Bi (three of 12 patients, 10 of 60 clones). Nine patients were found to be co-infected with more than one ITS genotype of P. jirovecii. The prevalence of ITS genotypes in HIV patients from one Chinese hospital did not seem to be significantly different when compared to reports from other countries.
Department of Parasitology, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou 510080, China.
Kai
K
Li
Ai
A
He
Wei Ping
WP
Cai
Xiao Ping
XP
Tang
Xiao Ying
XY
Zheng
Zhuo Ya
ZY
Li
Xi Mei
XM
Zhan
D017088:AIDS-Related Opportunistic Infections / Q000453:epidemiology / Q000382:microbiology*; D000328:Adult; D001483:Base Sequence; D001992:Bronchoalveolar Lavage Fluid / Q000382:microbiology; D002681:China; D060085:Coinfection; D004271:DNA, Fungal / Q000235:genetics; D021903:DNA, Ribosomal Spacer / Q000737:chemistry / Q000235:genetics; D005260:Female; D014644:Genetic Variation; D005838:Genotype; D060005:Genotyping Techniques; D006801:Humans; D016867:Immunocompromised Host; D008297:Male; D008875:Middle Aged; D008969:Molecular Sequence Data; D058889:Molecular Typing; D016533:Mycological Typing Techniques; D045363:Pneumocystis carinii / Q000145:classification / Q000235:genetics* / Q000302:isolation & purification; D011020:Pneumonia, Pneumocystis / Q000453:epidemiology / Q000382:microbiology*; D015995:Prevalence; D012340:RNA, Ribosomal, 5.8S / Q000235:genetics; D017422:Sequence Analysis, DNA
D004271:DNA, Fungal; D021903:DNA, Ribosomal Spacer; D012340:RNA, Ribosomal, 5.8S