We analyzed the epidemiological investigation results of the first case of human infected with avian influenza (H5N6) ,and summarized epidemiological characteristics of this case to provide reference to H 5N6 case screening and investiga‐tion in future works .We retrospectively described and analyzed the investigation progress ,specimen detection results of epi‐demic spot and intimate contact people ,and summarize epidemiological characteristics of this case .Result showed that the first case of human infected with H5N6 in Yunnan was a single case ,and did not showed human‐to‐human transmission .This case had contacts with wild bird and had birds’ market activity before diagnoses ;some environment specimen of birds market near patient’s home has detection results of H5N6 positive .This is a cases of local infection and did not show human‐to‐human transmission .From the investigation ,we could deduced that the transmission route is from birds to human or from birds to en‐vironment and then to human .

Objective To investigate the ultrasonic appearance of peripheral neurilemmoma.Methods Ultrasonic appearances of 43 patients with 46 neurilemmomas confirmed by surgery and pathology were analyzed retrospectively and compared with their MRI and pathological features.Results Forty-five neurilemmomas were with regular shape and clear boundary,except one at the root of nerve C4 that was irregular in shape and unclear in boundary,like adumbbell.Sonography showed that there were 30 neurilemmomas displaying as solid tumors,15 as cystic and solid,and 1 as entirely cystic.Posterior echoenhancement,target sign,rat tail sign and vessels accompanying sign were found in 39,21,23 and 17 neurilemmomas,respectively.There were 4 neurilemmomas with ultrasound blood flow grade 0,9 with grade Ⅰ,22 with gradeⅡ,and 11 with grade Ⅲ.The target signs were found in 21 cases (21/46,45.6％) and 26 cases (26/46,56.5 ％) by ultrasound and MRI,respectively.The capability of ultrasound finding the target sign in neurilemmoma was comparable to MRI(Kappa =0.527,P ＜0.001).The diagnostic accuracy rate of neurilemmoma by ultrasonography was 73.9％(34/46).Conclusions The ultrasound has a relatively high detection of the target sign in neurilemmoma,which may provide a new basis for the ultrasonic diagnosis of neurilemmoma.

A total of 30 cats were used in this experiment.The nucleus raphe magnus wasinjected with 0.1～0.3?l of 25～50% HRP solution(RZ:2.4～3.1).Two or three daysafter operation,the animals were killed and then perfused with the fixing fluid.Thebrainstem and spinal cord were sectioned serially on a freezing microtome and treatedaccording to the method of retrograde axonal transport of horseradish peroxidase.Parts of the sections were counterstained with toloidine-blue.The labelled neuronswere examined microscopically under bright-field and dark-field illumination Thelabelled neurons were distributed as follows.After injections of nucleus raphe magnus,a few labelled neurons were foundin the medial part of parafascicular nucleus of the thalamus.A greater numbers oflabelled cells were consistently found in the ventrolateral area of the central greymatter of the midbrain.The dorsal nucleus of the midbrain raphe had a few labelled neurons.The HRPpositive neurons were found in the nucleus Darkschewitsch,mesencephalic reticularformation,nucleus reticularis gigantocellularis,nucleus reticularis paramedianus,nucleus vestibularis medialis and nucleus vestibularis lateralis.In some cases a fewlabelled cells were also seen in the posterior area of hypothalamus,nucleus posteriorcommissure,nucleus tegmentalis dorsalis,superior collicus,nucleus annularis,reticularformation of the pons,nucleus nervi facialis and nucleus gracilis.In summary,the present studies show that the afferent connections of nucleusraphe magnus are widely concerned with the structures of the pain control.Itsuggests that the nucleus raphe magnus is an important relay station for pain control.

Objective To investigate the micro-anatomical approach to resect both intracranial and extracranial jugular foramen tumors in one-stage. Methods With the aid of surgical microscope, fifteen cadaver heads were used to study the microsurgical anatomy of high cervical part and jugular foramen, measure relative data. Results Detailed dissection was performed on high cervical part between the 1st cervical vertebra and the 4th cervical vertebra, resect foramen processus transversi of the 1st cervical vertebra, free vertebral artery 2nd and 1st cervical vertebra segment and horizontal segment. The jugular tubercle, jugular tunisia and part of the occipital condylus was drilled away as much as possible, total exposure of lateral semicircular canal was completed after the removal of the mastoid revealed labyrinthinem. Then the sigmoid sinus and jugular bulb were skeletonized. The vertical of segment of facial nerve was fully skeletonized to study the necessity of the facial nerve translocation. Full exposure to the sigmoid sinus, open jugular foramen. JF areas expanded, and the measured parameters revealed. The distance was (29.65 ± 3.24)mm from mastoidalec to oncentrated focus of condyle (10.18 ± 0.81)mm from hinder margin of condyle to endostoma of hypoglossal canal. The left distance was (6.8 ± 0.35)mm from jugular foramen to perpendicular part of facial nerve, right was (4.6 ± 0.33)mm. Conclusions Total exposure of JF can be achieved through the approach we described, and will enable the facial nerve, cochlea, and the structure of the vertebral artery to be performed. Both intracranial and extracranial tumors can be removed in a one-stage procedure related to anatomical parameters. Improve the cure, reduce complication and lower mortality.

OBJECTIVETo explore a new technique to prevent the dispersal of Oncomelania hupensis snail through leading flood for irrigation by floodgate in irrigation schemes.

METHODSHydromechanical and biological were applied and to combine laboratory experiment with the field observation to form a new multidisciplinary regarding snail biological hydraulics and technical line. Findings including characteristics of hydraulics and biomechanics and move regulation etc. Physics parameter of snails were used to design and construct as well as to exam the effect of facilities and rebuilt floodgate which could prevent the snail dispersal.

RESULTSThrough five years efforts, the major achievements were found as: 1) the method in testing the special gravity of snail and snail eggs was determined. 2) the special gravity of snail was (1.8 +/- 0.01) g/cm(3) and special gravity snail eggs was (2.29 +/- 0.01) g/cm(3); the classification method and classified criterion of snail size were made based on geometrical characteristics of snail shell. Six special values indicating dropping and start speed of snail in running water were obtained; Five practical formula of snail dropping and start in water were established; threshold value and movement characteristics in water were observed and tested and move mechanism of snail dispersal in water was also clarified. Based on the findings from fundamental research, the facilities of "precipitation pool for snail" and "leading water from middle level of water body" that could prevent snail dispersal were designed and rebuilt in the endemic area. Through examination to these facilities, the rate of precipitating and blocking of snails reached 100%.

CONCLUSIONThe achievement of the study provided reliable theoretical basis for the rebuilt of floodgate and to development of models that could prevent the dispersal of snail effectively.

Agriculture ; Animals ; Disease Vectors ; Schistosomiasis ; prevention & control ; transmission ; Snails ; growth & development ; Specific Gravity

Objective To investigate the effects of the intervention,rehabilitation and speech development of children with severe hearing loss in some rural areas.Methods 61 children,including 35 males and 26 females,were diagnosed as severe hearing loss with ABR and 40 Hz-AERP from June 2004 to July 2008.All the children failed hearing screening or visited the hospital as outpatients.The ages ranged from 2 to 72 months with the average age of 17.59 months.During telephone follow-up,the questionnaire was used to gather the data regarding the usage of hearing aids,hearing and speech rehabilitation,speech development,and communication abilities.Results 33 (54.10%) children were fitted with hearing aids,and 2 (3.28%) received cochlear implants,while 26(42.62 %) neither had hearing aids nor cochlear implants.10 cases with hearing aids also had speech training,whereas 23 children with hearing aids did not receive the training.2 cases with cochlear implants and 2 cases with hearing aids were found to have good speech development and communication ability,while 31 cases with hearing aids had delayed speech development.26 cases without any devices had to rely on sign language for their commumication.Conclusion Children in rural area with severe hearing loss experience greater speech and communication difficulties because many of them have no access to intervention and speech training.The results suggest that it would be very important to increase public awareness and educate parents to have their children wear hearing aids and receive speech training.

Objective: To observe the clinical course of children with juvenile-onset recurrent respiratory papillomatosis (JORRP) until 14 years old. Methods: The clinical data of one hundred and twenty cases treated between Januray 1, 2002 and September 30, 2017 in Beijing Tongren Hospital were analyzed retrospectively. Excluding the deaths and the lost, patients who could be ≥ 5 years without recurrence, were defined as the cured group, and < 5 years with recurrence defined as the recurrent group. Furthermore, using statistical methods to analyze the differences of the age of initial operation, total number of operations, invasive lesion, HPV infection, tracheotomy, airway dissemination after tracheotomy and time of tube wear between the two groups. Results: One hundred and three cases were followed up, except for the six deaths.Numbers of operations in eight cases were ≤2, and ≥3 in eighty nine cases.Peak of the primary surgical age were about 4.5 years old, while the self-healing trend occurred at nine years old. In the cured group, forty three cases were cured, with a curative rate of 41.7% (43/103), and there were all fifty four survivors in the recurrent group.The total number of operations, invasive cases, HPV positive cases and the G score of hoarseness in the recurrent group were higher than those in the cured group (F=13.02, χ²=13.04, χ²=17.37, Z=-4.59, P<0.05). The number of tracheal dissemination caused by tracheotomy in the recurrent group (66.7%, 27.8%)was more than that in the cured group (χ²=16.01, P<0.05). Compared with the time of wearing a tracheostomy tube in cured group, the recurrent group was longer ((3.4±3.1) years vs (8.3±6.7) years, χ²=7.19, P<0.05). Conclusions 41.7% of the patients had no relapse for at least five years.There exsisted differences between the cured and recurrent group in the following aspects: the total numbers of surgery, the agression of the lesions, tracheal intratracheal dissemination after tracheotomy, the time of tracheotomy, the HPV typing and the G grading of hoarseness.

Objective:To investigate the efficacy of shoulder arthroscopic balance point compaction with cross suture-bridge technique inr the treatment of avulsion fracture of the greater tuberosity of the humerus.Methods:A retrospective case series study was conducted on 14 patients with avulsion fracture of the greater tuberosity of the humerus treated in Affiliated Xinhua Hospital of Dalian University from March 2021 to March 2022, including 8 males and 6 females; aged 30-58 years [(40.2±10.5)years]. Among them, 5 patients had fracture in the left shoulder and 9 in the right shoulder. The fracture was classified as the avulsion type according to Mutch classification. All the patients were treated with shoulder arthroscopic balance point compaction with cross suture-bridge technique. The anteroposterior X-ray of the shoulder joint was taken at 1 week, 3 months, and 6 months after surgery to evaluate fracture reduction and fixation. The operative time and intraoperative blood loss were recorded. Fracture healing was evaluated by shoulder MRI at 6 months after surgery. The visual analog score (VAS), Constant shoulder joint score, American Shoulder and Elbow Surgeons (ASES) score, and shoulder range of motion (active abduction angle, active lateral external rotation angle, and active lateral internal rotation) preoperatively, at 3, 6 months after surgery and at the last follow-up were compared. The postoperative complications were observed.Results:All the patients were followed up for 12-15 months [(12.5±0.8)months]. The operative time and intraoperative blood loss were (67.0±10.5)minutes and (20.0±3.8)ml. The anteroposterior X-ray of the shoulder joint showed good reduction and fixation at 1 week, 3 months and 6 months after surgery. MRI T1 image at 6 months after surgery showed locally evenly distributed high signal, suggesting that the fracture was healed well. The values of VAS were (3.2±0.4)points, (2.5±0.5)points, and (0.7±0.3)points at 3, 6 months after surgery and at the last follow-up, which were lower than (7.2±0.6)points preoperatively; the values of Constant joint shoulder score were (53.2±5.3)points, (81.1±4.4)points, and (92.8±5.3)points, which were higher than (42.3±7.6)points preoperatively; the values of ASES score were (55.6±3.6)points, (77.1±3.2)points, and (90.8±3.5)points, which were higher than (45.8±4.2)points preoperatively; the active abduction angles were (60.5±2.5)°, (107.8±6.6)°, and (168.5±3.5)°, which were higher than (18.3±3.3)°preoperatively; the active lateral external rotation angles were (25.8±2.5)°, (30.8±2.2)°, and (63.8±2.8)°, which were higher than (15.6±3.2)°preoperatively ( P<0.05 or 0.01). The level of active internal rotation was L 5, L 1, and T 10, which was better than S 3 before surgery. The VAS, Constant shoulder joint score, ASES score, active abduction and active external rotation were significantly improved at the last follow-up compared with those at 3, 6 months after surgery (all P<0.05), with markedly improved level of active internal rotation. No major complications such as infection, instability of the shoulder joint or acromial impingement were found after surgery. Conclusion:Shoulder arthroscopic balance point compaction with cross suture-bridge technique for the treatment of avulsion fracture of the greater tuberosity of the humerus has advantages of decreased intraoperative blood loss, good reduction and healing, shoulder pain relief, early restoration of shoulder function and mobility, and few complications.

Anterior Cruciate Ligament Reconstruction ; Femur/surgery*