Assessment of enzyme linked immunosorbent assay based diagnostic kits (Toxokit-G and Toxokit-M) for the detection of IgG and IgM antibodies to Toxoplasma gondii in human serum

An enzyme linked immunosorbent assay (ELISA) using penicillinase was developed in the form of diagnostic kits (Toxokit-G and Toxokit-M) for the detection of IgG and IgM antibodies to Toxoplasma gondii. The performance of both the kits was compared with commercially available diagnostic kits, i.e. Enzygnost-Toxoplasmosis/IgG (Behring Co., Germany), TOXOTEK-G (Flow Lab., U.K.) and Toxoplasma IgM Microassay (Diamedix Corp., U.S.A.) by testing toxoplasma-suspected human serum samples. The results indicate a good reliability between these diagnostic kits. Toxokit-G has 86.66 and 96.05% sensitivity and specificity respectively. The main advantage of Toxokit-G is that the end result can be assessed visually without using sophisticated instruments. Toxokit-M has 100% sensitivity and specificity and test results were not affected by the presence of antitoxoplasma IgG antibodies, rheumatoid factor or antinuclear antibodies.     

Prevalence of enterotoxigenic staphylococci in nose, throat and skin lesions in meat-workers

The frequency of enterotoxigenic coagulase-positive and coagulase-negative staphylococci in nose and throat and in hand lesions was investigated in 86 meat cutters and dressers. Enterotoxin-producing staphylococci were demonstrated in nasal swabs from 22% of clinically well workers and from 42% of a group with mild coryza. The corresponding rates in throat swabs were 6 and 12%. Four of 16 superficial lesions of the hand harbored enterotoxigenic staphylococci. The implications for contamination of food and outbreaks of staphylococcal food poisoning are discussed.     

Characterization of Penicillinase Inhibitor in Bovine Serum

Bovine serum containing penicillinase inhibitor activity was fractioned by gel filtration chromatography and ion exchange chromatography. The penicillinase inhibitor was principally located in the IgG-fraction and therefore appears to be an antibody.When serum antipenicillinase activity was screened in material consisting of 54 animals, mastitis cows showed higher incidence of penicillinase inhibitor than healthy animals.Serum penicillinase inhibitor had a slight effect on the MIC-value of penicillin against penicillinase producing staphylococci which indicates that this inhibitor could have some clinical influence in increasing bacterial sensitivity to penicillin.     

复方阿莫西林乳房注入剂无菌检查方法的确立

建立了复方阿莫西林乳房注入剂的无菌检查方法。根据《中国兽药典》2010年版一部附录要求,通过比较薄膜过滤法和直接加入法对本品的适用性,最终选用直接加入法作为无菌检查方法,即以每1 mg阿莫西林中加入9000单位的青霉素酶来消除供试品的抑菌活性,并通过无菌方法验证,证明该方法适用于对复方阿莫西林乳房注入剂进行无菌检查。