The two years' outbreak cases were 12.72%(114/896) and 10.07% (29/288) in the total number of cases respectively, and it were concentrated in the primary lower grades' children (7-10 years), and the outbreak cases were 78%(89/114) and 69%(20/29) of the total number of cases respectively.
The average bacterial count recovered from the bacterial carriers prepared with the bacterial suspensions prepared with TSB was 14.95% after exposure for 3 groups of time and the number of bacteria dropping in the immersion solution accounted for 2.90% of the bacteria load and increased with prolonging the immersion time.
Within 5 weeks, there were little relation between the concentration of 2% Glutaraldehyde, the aldehyde content, the number of contaminated bacteria and quantity, type, and weight of immersion appliances and use frequency.
Methods Male mice were injected intraperitoneally with methamidophos at varied doses of 0 5 mg/kg,3 75 mg/kg,5 0 mg/kg and 7 5 mg/kg of body weight,respectively. The number,motility and morphology of their sperms were determined four weeks after exposure.
On the 14th day after irradiation,compared with the negative control group,CFU\|S, spleen index,number of nucleated cells in bone marrow increased markedly in LJPS group,On days 3,7 and 14,bcl\|2 protein level elevated markedly in the LJPS group.
Methods A total of 30 male SD rats were randomly divided into control group,high,low dose fluorine treated groups,which were given normal saline,20 mg/kg sodium fluoride,and 10 mg/kg sodium fluoride respectively. After 39 days the change of the weight of rats and the number of sperms were observed. The change of telom- erase reverse transcriptase(TERT)and proliferating cell nuclear antigen(PCNA)were observed by using in situ hybridization and radioimmunoassay respectively.
[Methods]30 SD rats were randomly divided into 3 groups according to their weight and were exposed to toluene of different concentrations(0,130 and 1 300 mg/m3 respectively) for 2 and 24 hours,then the serum and ovary of the rats were collected; Radioimmunoassay was applied to determine the sex hormone(E2 and P4) in serum; the ovary samples were stained with HE and the number of follicles was calculated.
(4). With regard to B/Shanghai/361/2002 , 13 strains of influenza viruses have changed in antigen binding B、D and nearby sites. The number of glycosylation site have also been different from B/Shanghai/361/2002.(5).
The results showed that the number of the persons with chromosome aberration in the study group(18 couples, 3G people) was 22(61.1%) while the number of the persons in the control group was much lower, only 2 in 24(8.3%)(X~2=16.76 P<0.01).
In order to testify the safety and application scope of GJB2-82 "Safety Standard for Effects ofPressure Waves from Firing or Explosion by Conventional Weapons on Human Bodies", six groupsof guinea pigs were exposed to firing noise of submachine gun with varied number of shooting andsound intensity,while the noise dosages were all close to the safety standard value (-2-1 dB).