Filariasis mosquitoes and susceptibility of Cx. quinquefasciatus and Cx. vishnui to insecticides were investigated in September 2004 and May 2005 in Khanh Trung commune, Khanh Vinh district, Khanh Hoa province. Twenty two mosquito species belonging to 5 genus have been found, of which the primary vector of W.bancrofti filariasis was captured with a high density, while vectors of B.malayi was found in a lower density. A total of 805 mosquitoes of 6 species (An.barbumbrosus, An. vagus, Cx.fuscocephala, Cx.quinquefasciatus, Cx.tritaeniorhynchus and Cx. vishnui) were dissected. None of them were positive with microfilaria. Cx.quinquefasciatus was found highly resistant to lambdacyhalothrin, alphacypermethrin and malathion with the mortalities of 11 %, 21%, and 60%, respectively. Similarly, the mortalities of Cx.vishnui were 19.76%, 23.83% and 13%-17%, respectively.
Filariasis ; Culicidae ; Malaria

A survey was conducted on 3 subjects groups (wearing 100% plain silk, 100% satin silk, and 100% polyester shirt). All participants walked ten minutes on treadmill in hot (32-34oC) and humidity (72-75%) environment. The aim of the survey was to compare the fabric advantages for users working in hot and humid ambient environment. Obtained results showed there were no significant differences neither in skin temperature nor heart rate of subjects wearing shirt made of pure silk or pure polyester fibbers. However the subjective irritating sensations were dominant in subjects wearing 100% polyester shirt, while less ratio of that was observed for subjects wearing 100% silk shirt. The average amount of sweat remained in the 100% polyester shirt was higher than that in the silk one.
Clothing ; Environment

Results of the study on 84 operators showed that automatic working conditions affected on operator's health considerably: 31% of workers suffering from emotional disorder were founded out by questionnaires and psychological tests. Among them, there were 5 cases of anxiety-depression, 17 cases of simple depression and 4 cases of simple anxiety. These results corresponded to the analysis of operator's socio-economic and their working conditions. Some recommendations were suggested to eliminate the negative effects of automatic work.
Stress ; Mental Health ; Operator Regions

Circus is a specific work demanding high physical effort and emotional strain. Using monitoring ECG, the survey was conducted on 12 young male and female circus actors, aged 14-21 years during their training performance. The aim of the survey was to evaluate circus workload on cardio-vascular system. The obtained results showed that circus could be considered as extreme heavy work according to the Christensen's classification. Their average heart rate (RH) during the performance was 163 beats/min (heart rate at rest was 76.6 beats/mn). The momentary maximal HR was 255 beats/min for swinging performance on altitude and 198 beats/min for jumping and marking loops in the net. Their minute HR variations were 35-130 beats/min and 10-58 beats/min accordingly. The benefit of the monitoring ECG in studying some specific occupations was confirmed.
Accidents, Occupational ; Electrocardiography

Study was conducted in laboratory condition for investagating the relationship between muscle strain and arm positions. Rerults showed that: the bio-potential of brachioradialis, deltoid and trapezius muscles were significant higher when the arms were elevated at haft-arm length. The trapezius had highest bio-potential than the other left. The subjective shoulder pain occurred after 15-17 mimutes of experiment. When was higher hio-potential, that the muscle pain was more obvious. The accumulation of pain can be considered as reason of that called Neck-Shoulder Disorders.
Muscles ; Arm

31 male and female air-traffic controllers (ATCs) were investigated during their work shift (24 hours continuously). The index of heart rate mathematical analysis, blood pressure, simple reaction time and CFF test during working shift were measured. Some questionnaires were given to subjects as well. The obtained results (systolic blood pressure, CFF,  and strain index, simple reaction time) showed changes in comparison with that before work. The rate of some subjective symptoms such as eye irritation, headache, dry and sore throat, whole body fatigue, pain in shoulders and low back, etc were rather high. Specific work conditions and working duration were the main reasons of work strain in ATCs.
Workload ; diseases

The study was conducted on two groups of air traffic controllers having different working hours (24 hours for 1st group and 6 hours for 2nd group) to evaluate the impact of working hours on controller health. Blood pressure, heart rate, simple reaction time, critical fusion frequency were taken before and after work. Sick building syndrome (SBS) questionnaires were used as well. Results showed that almost physiological parameters taken after work in group 1 were varied significantly versus that before work, while those were not varied in 2nd group. The incidence of SBS was higher dramatically in the group 1st versus group 2nd
Preventive Medicine ; Public Health ; manpower

Background:The dimension and function of kidney have close relationship. In the developing countries, the index on kidney dimension of children has rather fully studied. In Viet Nam, most of studies only conducted on adults. Objectives:This study aims to determine the ultrasound kidney dimension and the correlation of kidney length and age, weight and height of children aged from 6 to 8 years old. Subjects and method: The data was obtained from a prospective study on 180 normal children at age from 6 to 8 years. Each kidney was measured length, width , thickness, and parenchymal thickness, and the mean values were recorded. The relationship of kidney length with age, body weight, body height were also taken. Results: Kidney dimension was increased by age. The average ultrasound kidney dimension:+ Right kidney: At 6 years old: Boy: length: 72.8\xb14; width: 31.2\xb13 ; thickness: 33.9\xb12 ; Girl: length: 69.8\xb15; width: 30.4\xb12 ; thickness: 32.7\xb12. At 7 years old: Boy: length: 75.2\xb14; width: 31.9\xb12; thickness: 33.8\xb13; Girl: length: 75.8\xb15; width: 32.0\xb12; thickness: 32.9\xb14; + Left kidney: At 6 years old: Boy: length: 73.9\xb15; width: 33.7\xb13 ; thickness: 34.9\xb12 ; Girl: length: 71.1\xb14; width: 32.4\xb13 ; thickness: 32.4\xb16. At 7 years old: Boy: length: 77.7\xb13; width: 33.8\xb13 ; thickness:34.7\xb12; Girl: length: 76.9\xb17; width: 32.0\xb12; thickness: 33,9\xb15; The kidney length, kidney weight, kidney volume of boys were bigger than girls, and the difference was significant (p<0.05). Conclusion: The kidney length correlated strongly and positively with body weight, body height and age.
Kidney/ ultrasonography ; Child

SARS-CoV-2 variant B.1.1.7, first detected in September 2020 in the United Kingdom of Great Britain and Northern Ireland, has spread quickly to many countries around the world. While some publications have described the clinical features of adult patients with the B.1.1.7 variant, little information is available on newborn patients. We report the clinical characteristics, treatment and care practices for a 21-day-old newborn patient who was confirmed to be infected with SARS-CoV-2 variant B.1.1.7 in Viet Nam during contact tracing after her father was confirmed to be infected with SARS-CoV-2. The patient displayed no symptoms of COVID-19 on admission but 3 days later developed diarrhoea, vomiting, a runny nose and a productive cough. These symptoms lasted for 3 days before becoming milder for 1 day and then stopping until discharge. During treatment, the patient received Vietnamese traditional herbal peppermint extracts for cough and digestive probiotics for diarrhoeal symptoms. A saltwater solution (Sterimar 0.9%) was used to clean the patient’s sinuses. The patient was cared for and fed breastmilk by her mother, who was provided with personal protective equipment, including sterilized infant equipment, medical masks and hand sanitizer, during hospitalization. The patient’s mother tested negative for SARS-CoV-2 throughout hospitalization. In conclusion, we found no severely abnormal clinical symptoms in a newborn infected with SARS-CoV-2 variant B.1.1.7 during treatment. Our case suggests that newborn patients with the B.1.1.7 variant can receive exclusive breastmilk feeding if sufficient preventive measures are provided for both mother and child.