Assessment of RNA amplification by multiplex RT‐PCR and IgM detection by indirect and capture ELISAs for the diagnosis of measles and rubella

Sanz JC, Mosquera M, Ramos B, Ramírez R, de Ory F, Echevarria JE. Assessment of RNA amplification by multiplex RT‐PCR and IgM detection by indirect and capture ELISAs for the diagnosis of measles and rubella. APMIS 2010; 118: 203–9. The aim of the study was to compare RNA amplification using multiplex RT‐PCR and IgM detection by means of indirect and capture ELISAs for the diagnosis of measles and rubella. A total of 229 cases of maculopapular rash with serum and throat swab samples were included. Specific serological IgM to measles and rubella was determined by Enzygnost^® (Siemens) and Platelia^TM (Bio‐Rad). Both viruses were researched using multiplex RT‐PCR performed on throat samples. Criteria for inclusion of measles or rubella cases were a positive RT‐PCR result for one virus and negative for the other; and/or a positive IgM result for one virus by both ELISAs and negative RT‐PCR for the other virus. A total of 74 cases were classified as measles and 54 as rubella. In measles, sensitivity and specificity were 93.2% and 100% for RT‐PCR, 97.3% and 98.1% for Enzygnost^®, and 90.5% and 95.5% for Platelia^TM. For rubella, these values were 42.6% and 100% for RT‐PCR, 100% and 97.1% for Enzygnost^®, and 94.4% and 98.3% for Platelia^TM. Enzygnost^® and Platelia^TM are useful techniques for detecting IgM against measles and rubella. RNA amplification by RT‐PCR was both sensitive and specific for the diagnosis of measles; however, for rubella, the sensitivity of this technique must be improved.     

ANGEBOHRT

Der Freie Zahnarzt -     

Physicochemical properties of endodontic sealers of different bases

Objective

To assess the setting time (ST), flow (FL), radiopacity (RD), solubility (SB) and dimensional change following setting (DC) of different sealers (AH Plus^®, Polifil, Apexit Plus^®, Sealapex^®, Endométhasone^® and Endofill^® according to American National Standards Institute/American Dental Association (ANSI/ADA) Specification 57.

Material and methods

Five samples of each material were used for each test. For ST, cast rings were filled with sealers and tested with a Gilmore needle. For FL, the sealer was placed on a glass plate. After 180 s, another plate with 20 g and a load of 100 g were applied on the material, and the diameters of the discs formed were measured. In RD, circular molds were filled with the sealers, radiographed and analyzed using Digora software. For SB, circular molds were filled with the sealers, a nylon thread was placed inside the material and another glass plate was positioned on the set, pressed and stored at 37ºC. Samples were weighed, placed in water, dried and reweighed. The water used for SB was analyzed by atomic absorption spectrometry. For DC, circular molds were filled with the sealers, covered by glass plates and stored at 37ºC. Samples were measured and stored in water for 30 days. After this period, they were dryed and measured again.

Results

Regarding ST, AH Plus^®, Apexit^® and Endofil^® sealers are in accordance with ANSI/ADA standards. Endométhasone''s manufacturer did not mention the ST; Polifil is an experimental sealer and Sealapex^® did not set. Considering RD, SB and DC, all sealers were in accordance with ANSI/ADA. The spectrometric analysis showed that a significant amount of K⁺ and Zn2⁺ ions was released from Apexit Plus^® and Endofill^®, respectively.

Conclusion

Except for DC, all other physicochemical properties of the tested sealers conformed to ANSI/ADA requirements.     

顽固性频发性室性早搏的射频消融治疗

目的：了解射频消融治疗顽固性频发室性早搏的效果。方法：采用心室激动顺序与起搏标测法进行室性早搏标测定位，标测到室性早搏最早激动点较体表心电图QRS波提前30ms以上或消融电极起搏心电图QRS波图形与室早图形完全一致时放电消融。结果：16例中15例成功，成功率93．3％。无并发症发生。结论：射频消融治疗频发单形室性早搏安全有效。