2. Ma L, Kutty G, Jia QY, Kovacs JA. Characterization of variants of the gene encoding the p55 antigen in Pneumocystis carinii from rats and mice. Journal of Medical Microbiology 2003; 52: 955-960.
3. Ma L, Kutty G, Jia QY, Imamichi H, Huang L, Aztori C, Beckers P, Groner G, Beard CB, Kovacs JA. Analysis of variation in tandem repeats in the intron of the major surface glycoprotein expression site of the human form of Pneumocystis carinii. Journal of Infectious Diseases 2002; 186:1647-1654.
4. Ma L, Jia QY, Kovacs JA. Development of a yeast assay for rapid screening of inhibitors of human-derived Pneumocystis carinii dihydrofolate reductase. Antimicrobial Agents & Chemotherapy 2002;46:3101-3103.
5. Ma L, Kovacs JA, Cargnel A, Valerio A, Fantoni G, Atzori C. Mutations in the dihydropteroate synthase gene of human-derived Pneumocystis carinii isolates from Italy are infrequent but correlate with prior sulfa prophylaxis. Journal of Infectious Diseases 2002; 185:1530-1532.
6. Ma L, Imamichi H, Sukura A, Kovacs JA. Genetic divergence of the dihydrofolate reductase and dihydropteroate synthase genes in Pneumocystis carinii from seven different host species. Journal of Infectious Diseases 2001;184:1358Ð1362.
7. Kutty G, Ma L, Kovacs JA. Characterization of the
expression site of the major surface glycoprotein of human-derived Pneumocystis
carinii. Molecular Microbiology 2001; 42:183-194.
8. Ma L, Kovacs JA. Genetic analysis of
multiple loci suggests that mutations in Pneumocystis carinii f. sp. hominis dihydropteroate synthase gene arose independently in multiple strains. Antimicrobial
Agents & Chemotherapy 2001; 45:
3213Ð3215.
9. Ma L, Kovacs JA. Rapid detection of mutations in the human-derived Pneumocystis carinii dihydropteroate synthase gene associated with sulfa resistance. Antimicrobial Agents & Chemotherapy 2001; 45: 776-780.
10. Ma L, Kovacs JA. Expression and characterization of recombinant human-derived Pneumocystis carinii dihydrofolate reductase. Antimicrobial Agents & Chemotherapy 2000; 44:3092-3096
11. Ma L, Borio L, Masur H, Kovacs JA. Pneumocystis carinii dihydropteroate synthase but not dihydrofolate reductase gene mutations correlate with prior trimethoprim-sulfamethoxazole or dapsone use. Journal of Infectious Diseases 1999;180:1969-1978.
12. Ito A, Ma L, Schantz PM, Gottstein B, Liu YH, Chai JJ,
Abdel-Hafez SK, Altintas N, Joshi
DD, Lightowlers MW, Pawlowski ZS. Differential serodiagnosis for cystic and
alveolar echinococcosis using fractions of Echinococcus granulosus cyst fluid (antigen B) and E. multilocularis protoscoleces (Em18). American Journal of Tropical
Medicine & Hygiene 1999;60:188-192.
13. Ito A, Sakakibara Y, Ma L, Asano K, Takiguchi M, Yasuda
U, Hashimoto A. Ultrasonographic and serologic studies of experimental cysticercosis
in rats infected with Taenia taeniaeformis. Parasite Immunology 1998;20:105-108.
14. Ito A, Ma L, Paul M, Stefaniak J, Pawlowski ZS, 1998.
Evaluation of Em-18-, Em16-, antigen B-Western blots, Em2plus-ELISA
and four other tests for differential serodiagnosis of alveolar and cystic
echinococcosis patients in Poland. Parasitology International 1998;47:95-99.
15. Ito A, Plancarte A, Ma L, Kong Y, Flisser A, Cho SY,
Liu YH, Kamhawi S, Lightowlers MW, Schantz PM. Novel antigens for
neurocysticercosis: simple method for preparation and evaluation for
serodiagnosis. American Journal of Tropical Medicine & Hygiene 1998;59:291-294.
16. Yang HJ, Chung JY, Yun DH, Ito A, Ma L, Chung YB, Lee
SC, Kang SY, Kong Y, Cho SY. Immunoblot analysis of a 10 kDa antigen in cyst
fluid of Taenia solium metacestodes.
Parasite Immunology 1998;20:483-488.
17. Chen YT, Ma L. Detection of Cryptosporidium parvum in fecal samples using polymerase chain reaction combined
with non-radioactive labeled DNA probe hybridization. Chinese Journal of
Parasitology & Parasitic Diseases 1998;16:246-250.
18. Ito A, Okamoto M, Ishiguro T, Ma L, Suzuki H, Yasui A,
Shigeta H, Matsuura T, Hosokawa T, Chai JJ. An imported case of cystic echinococcosis case in Japan
diagnosed by image and serology with confirmation of Echinococcus granulosus specific DNA sequences. American Journal of Tropical
Medicine & Hygiene 1998;58:790-792.
19. Ma L, Ito A, Liu YH, Wang XG, Yao YQ, Yu DG, Chen YT. Alveolar echinococcosis: Em2plus-ELISA and Em18-Western blots for follow-up after treatment with albendazole. Transactions of Royal Society of Tropical Medicine & Hygiene 1997;91:476-478.
20. Ito A, Ma L, Itoh M, Cho SY, Kong Y, Kang SY, Horii T,
Pang XL, Okamoto M, Yamashita T, Lightowlers MW, Wang XG, Liu YH. Immunodiagnosis
of alveolar echinococcosis by ELISA using partially purified Em18/16 enriched
fraction. Clinical & Diagnostic Laboratory Immunology 1997;4:57-59.
21. Kong Y, Chung JY, Yun DH, Kim LS, Kang SY, Ito A, Ma L,
Cho SY. Variation of antigenic proteins in maturation stage of Paragonimus
westermani. Korean Journal of
Parasitology 1997;35:197-202.
22. Ito A, Wen H, Craig PS, Ma L, Nakao M, Horii T, Pang
XL, Okamoto M, Itoh M, Osawa Y, Wang XG, Liu YH. Antibody responses against
Em18 and Em16 serodiagnostic makers in alveolar and cystic echinococcosis
patients from northwest China. Japanese Journal of Medical Science &
Biology 1997;50:19-26.
23. Ito A, Ito M, Eom KS, Chung WC, Ma L, Endo S, Fan PC.
In vitro hatched oncospheres of Asian Taenia from Korea and Taiwan develop into cysticerci in the
peritoneal cavity of female scid
(severe combined immunodeficiency) mice. International Journal for
Parasitology 1997;27:631-633.
24. Ito A, Ma L, Sato Y. Cystic metacestodes of a
rat-adapted Taenia taeniaeformis established
in the peritoneal cavity of scid and
nude mice. International Journal for Parasitology 1997;27:903-905.
25. Ma L, Ito A, Liu YH, Wang XG, Chen YT. Evaluation of
the diagnostic value of 18/16 kDa antigens in Echinococcus multilocularis by Western blotting. Chinese Journal of Parasitology
& Parasitic Diseases 1997;15: 65-68.
26. Ito A, Itoh M, Horii T, Pang XL, Okamoto M, Yamashita
T, Liu YH, Ma L, Wang XG, Cho SY, Kong Y, Kang SY, Lightowlers MW.
Immunodiagnosis of alveolar echinococcosis by ELISA using partially purified
Em18/16 enriched fraction. Clinical Parasitology 1996;7:135-137.
27. Chen YT, Ma L, Mei Q, Tang Y. Preliminary observation
of Pneumocystis carinii pneumonia in
the immunosuppressed rats treated by artemether. Chinese Journal of Parasitic
Diseases Control 1994;7:278-280.
28. Chen YT, Ma L, Mei Q, Tang Y. An experimental trial of
artemether in the treatment of Pneumocystis carinii pneumonia in the immunosuppressed rats. Chinese Medical
Journal 1994;107:673-677.