Loss of leishmanin skin test antigen sensitivity and potency in a longitudinal study of visceral leishmaniasis in Bangladesh

Loss of leishmanin skin test antigen sensitivity and potency in a longitudinal study of visceral leishmaniasis in Bangladesh
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DOI:
10.4269/ajtmh.2006.75.744
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发表时间:
2006-10-01
影响因子:
3.3
通讯作者:
Maguire, James H.
Maguire, James H.
中科院分区:
医学4区
文献类型:
--
作者:
Bern, Caryn;Amann, Josef;Maguire, James H.

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从2002年到2004年,在内脏利什曼病流行的孟加拉国社区进行了年度利什曼菌素皮肤试验(LST)调查,使用同一制造商和批次的婴儿利什曼原虫抗原。2002年,1 532人中有530人(35%)的LST结果呈阳性;患病率随着年龄的增长而增加。在前1-11个月、12-23个月和24-35个月治疗的47例黑热病患者中有24例(51%)、25例患者中有18例(72%)和13例患者中有11例(85%)的LST结果为阳性。2002年LST阳性结果与预防随后的黑热病有关(P < 0.0001)。2003-2004年,观察到抗原敏感性下降。在686名参与者中,2002年有34%的LST阳性,2003年有29%,2004年有19%。在63名治愈的黑热病患者中,2002年70%呈阳性,2003年53%呈阳性,2004年仅30%呈阳性。在171名同时检测两种抗原的参与者中,L。婴儿研究抗原敏感性为70%,与L.亚马逊抗原我们的数据强调需要更好的生产,标准化,并记录的灵敏度,效力和稳定性的利什曼肽抗原。
Annual leishmanin skin test (LST) surveys were conducted in a visceral leishmaniasis-endemic Bangladeshi community from 2002 through 2004, using Leishmania infantum antigen from the same manufacturer and batch. In 2002, 530 (35%) of 1,532 had positive LST results; the prevalence increased with increasing age. The LST result was positive in 24 (51%) of 47, 18 (72%) of 25, and 11 (85%) of 13 kala-azar patients treated in the previous 1-11, 12-23, and 24-35 months. A positive LST result in 2002 was associated with protection against subsequent kala-azar (P < 0.0001). In 2003-2004, decreased antigen sensitivity was observed. Among 686 participants, 34% were LST-positive in 2002, 29% in 2003, and 19% in 2004. Of 63 cured kala-azar patients, 70% were positive in 2002, 53% in 2003, and only 30% in 2004. Among 171 participants tested with both antigens, L. infantum study antigen sensitivity was 70% compared with L. amazonensis antigen. Our data underscore the need for better production, standardization, and documentation of sensitivity, potency, and stability of leishmanin antigens.