Chewing lice (Phthiraptera) that parasitize the globally threatened swan goose Anser cygnoides have been long recognized since the early 19th century, but those records were probably biased towards sampling of captive or domestic geese due to the small population size and limited distribution of its wild hosts. To better understand the lice species parasitizing swan geese that are endemic to East Asia, we collected chewing lice from 14 wild geese caught at 3 lakes in northeastern Mongolia. The lice were morphologically identified as 16 Trinoton anserinum (Fabricius, 1805), 11 Ornithobius domesticus Arnold, 2005, and 1 Anaticola anseris (Linnaeus, 1758). These species are known from other geese and swans, but all of them were new to the swan goose. This result also indicates no overlap in lice species between older records and our findings from wild birds. Thus, ectoparasites collected from domestic or captive animals may provide biased information on the occurrence, prevalence, host selection, and host-ectoparasite interactions from those on wild hosts.
Animals ; Bias (Epidemiology) ; Birds ; Far East ; Geese* ; Lakes ; Mastication* ; Mongolia ; Phthiraptera* ; Population Density ; Prevalence

Chewing lice (Phthiraptera) that parasitize the globally threatened swan goose Anser cygnoides have been long recognized since the early 19th century, but those records were probably biased towards sampling of captive or domestic geese due to the small population size and limited distribution of its wild hosts. To better understand the lice species parasitizing swan geese that are endemic to East Asia, we collected chewing lice from 14 wild geese caught at 3 lakes in northeastern Mongolia. The lice were morphologically identified as 16 Trinoton anserinum (Fabricius, 1805), 11 Ornithobius domesticus Arnold, 2005, and 1 Anaticola anseris (Linnaeus, 1758). These species are known from other geese and swans, but all of them were new to the swan goose. This result also indicates no overlap in lice species between older records and our findings from wild birds. Thus, ectoparasites collected from domestic or captive animals may provide biased information on the occurrence, prevalence, host selection, and host-ectoparasite interactions from those on wild hosts.
Animals ; Bias (Epidemiology) ; Birds ; Far East ; Geese* ; Lakes ; Mastication* ; Mongolia ; Phthiraptera* ; Population Density ; Prevalence

OBJECTIVETo evaluate whether the clustering of risk factors, both environmental and genetic, increases the risk of essential hypertension (EH) and the accumulation of risk factors influences the blood pressure level in normotensives.

METHODSOn the basis of a prevalence survey, 501 subjects of Mongolian ethnicity (243 hypertensives and 258 normotensives) who were not related to each other were selected to conduct a case-control study. All subjects were interviewed with questionnaires and their blood specimens were collected. Renin gene insertion/deletion (I/D) polymorphism, a new genetic marker, was genotyped with PCR and polyacrylamide gel electrophoresis.

RESULTSOverweight, alcohol consumption, and renin gene I/D polymorphism were significant risk factors of EH (P<0.05). The odds ratios (OR) for the number of risk factors were 2.39 (95%CI: 0.98-6.74) for one risk factor, 5.03 (95%CI: 2.06-14.18) for two, and 6.09 (95%CI: 1.85-22.38) for three respectively after adjusting for age and sex. In normotensives, age- and sex-adjusted mean blood pressures increased with more accumulation of risk factors. However, there were no significant differences among the different blood pressure levels according to the number of risk factors (P>0.05).

CONCLUSIONOverweight, alcohol consumption, and renin gene I/D polymorphism are risk factors of EH in the Mongolian ethnic population of China. The accumulation of the risk factors causes a sharp increase of the risk of EH.

Adult ; China ; ethnology ; Cluster Analysis ; Female ; Humans ; Hypertension ; epidemiology ; Male ; Middle Aged ; Mongolia ; epidemiology ; ethnology ; Odds Ratio ; Risk Factors

The status of intestinal parasitic infections and seroprevalence of cystic echinococcosis in the inhabitants in Dornod and Selenge, Mongolia, was observed with stool and serum samples from 165 and 683 residents from August 9 to August 15, 2003. A total of 10 inhabitants (6.1%) were found to be infected with protozoan cysts or oocysts by stool examinations; 7, 1 and 2 cases with Entamoeba coli, Giardia lamblia and Cryptosporidium parvum, respectively. A total of 62 people (9.1%) revealed significantly high levels of specific antibodies against Echinococcus granulosus by enzyme-linked immunosorbent assay (ELISA). The surveyed areas are rural areas and the sanitized tab water is not available. There is a possibility of endemic transmission of water-borne protozoan diseases in these areas. The clinical echinococcosis is needed to be searched from the seropositive inhabitants.
Protozoan Infections/*epidemiology/parasitology ; Mongolia/epidemiology ; Humans ; Giardia lamblia/isolation & purification ; Gastrointestinal Diseases/*epidemiology/*parasitology ; Entamoeba/isolation & purification ; Echinococcosis/*epidemiology ; Cryptosporidium parvum/isolation & purification ; Animals

OBJECTIVETo perform pathological observation and etiological identification of specimens collected from dairy cows, beef cattle and dogs which were suspected of rabies in Inner Mongolia in 2011, and analyze their etiological characteristics.

METHODSPathological observation was conducted on the brain specimens of three infected animals with Hematoxylin-Eosin staining, followed by confirmation using immunofluorescence and nested RT-PCR methods. Finally, phylogenetic analysis was conducted using the virus N gene sequence amplified from three specimens.

RESULTSEosinophilic and cytoplasmic inclusion bodies were seen in neuronal cells of the CNS; and rabies non-characteristic histopathological changes were also detected in the CNS. The three brain specimens were detected positive. N gene nucleotide sequence of these three isolates showed distinct sequence identity, therefore they fell into different groups in the phylogenetic analysis. N gene in the cow and dog had higher homology with that in Hebei isolate, but that in the beef cattle had higher homology with that in Mongolian lupine isolate and Russian red fox isolate.

CONCLUSIONRabies were observed in the dairy cow, beef cattle and canine in the farm in Inner Mongolia, in 2011, which led to a different etiologic characteristics of the epidemic situation.

Acetazolamide ; Animals ; Brain ; pathology ; Cattle ; Cattle Diseases ; epidemiology ; pathology ; Dog Diseases ; diagnosis ; epidemiology ; Dogs ; Mongolia ; epidemiology ; Nucleoproteins ; genetics ; Phylogeny ; Rabies ; epidemiology ; veterinary ; Rabies virus ; genetics ; Time Factors

OBJECTIVETo explore the relationship between Chlamydia pneumonia (CP) infection and hypertension as well as the interaction of traditional risk factors and CP infections on hypertension in Chinese Mongolian population.

METHODS1430 inhabitants living in Tongliao city, Inner Mongolia were selected as research subjects, including 488 hypertensives and 942 normotensives. Enzyme-linked immunoassay technique was used to test CP IgG antibody in the blood serum and SPSS 13.0 Microsoft was used to analyze the data.

RESULTSThe prevalence rates of hypertension were significantly different between CP IgG positive and negative groups, However, the trend was attenuated after adjusting age, sex, drinking, smoking, body mass index (BMI) and dyslipidemia. The CP infection rate was significant different in diastolic blood pressure groups, which was significantly higher in 80-84 mm Hg than that in the lowest DBP group. The interaction of chronic CP infection and other traditional risk factors were associated with hypertension in Chinese Mongolian ethnic groups. The ranking with significant sequence from high to low were BMI, dyslipidemia, alcohol intake, sex and age.

CONCLUSIONCP infection was not related to hypertension in Chinese Mongolian ethnic groups but the interaction with other traditional risk factors would increase the risk of developing hypertension.

China ; epidemiology ; Chlamydophila Infections ; epidemiology ; ethnology ; Chlamydophila pneumoniae ; Enzyme-Linked Immunosorbent Assay ; Female ; Humans ; Hypertension ; epidemiology ; ethnology ; Immunoglobulin G ; analysis ; Male ; Mongolia ; ethnology ; Seroepidemiologic Studies

OBJECTIVETo analyse the severe acute respiratory syndrome (SARS) epidemics in Inner Mongolian Autonomous Region and to provide scientific basis for prevention and control strategies against it.

METHODSData from legal communicable diseases surveillance reporting system was analyzed epidemiologically.

RESULTSThe first SARS case was reported in Inner Mongolian Autonomous Region on March 27, 2003. Up to May 20, there were 446 cumulative SARS cases in the whole region (with 287 confirmed cases and 159 suspected cases) and 61 cumulative recovered cases had been discharged from the hospitals (56 confirmed cases and 5 suspected cases). Another 131 cases were excluded the original diagnoses of SARS including 10 confirmed cases and 121 suspected cases. 25 confirmed cases died with a mortality rate of 8.7%. Cumulatively, the number of reported cases were distributed in 30 counties in 9 prefectures. Statistical analysis on time sequence of the occurrence of cases showed that majority (67.7% of the total) of the cases concentrated in between April 13 and April 29. The number of cases had started to decrease since April 24 with an average of 5.3 cases per day between May 3 and May 8 and an average of 0.3 cases per day between May 9 and today.

CONCLUSIONSSARS epidemics in our region could be divided into three phases. The first phase fell in between March 18 and April 15 with the first case being imported, the number of cases rose sharply, covering 14 counties in 6 prefectures, having a feature of family clustering. The second phase was from April 16 to April 28, with the appearance of secondary infection, having sharp rise of the cases and spreading to 24 counties in 10 prefectures. One of the major features was that hospitals had become the important sources of secondary infection. Finally, the third phase was between April 29 and May 20, with small wave crests of cases, spreading to 38 counties in 10 prefectures with a high proportion of cases with no history of direct contact with diagnosed SARS patients. Thus, no obvious transmission chain was noticed at this phase.

Adolescent ; Adult ; Aged ; Aged, 80 and over ; Child ; Child, Preschool ; Female ; Humans ; Male ; Middle Aged ; Mongolia ; epidemiology ; Severe Acute Respiratory Syndrome ; epidemiology ; mortality ; prevention & control

OBJECTIVENo previous studies have evaluated the association between dyslipidemia, alcohol drinking, and diabetes in an Inner Mongolian population. We aimed to evaluate the co-effects of drinking and dyslipidemia on diabetes incidence in this population.

METHODSThe present study was based on 1880 participants from a population-based prospective cohort study among Inner Mongolians living in China. Participants were classified into four subgroups according to their drinking status and dyslipidemia. Multivariate logistic regression analysis and receiver operating characteristic (ROC) curves were used to evaluate the association between alcohol drinking, dyslipidemia, and diabetes.

RESULTSDuring the follow-up period, 203 participants were found to have developed diabetes. The multivariable-adjusted odds ratios (95% confidence interval) for the incidence of non-dyslipidemia/drinkers, dyslipidemia/non-drinkers, and dyslipidemia/drinkers in diabetic patients were 1.40 (0.82-2.37), 1.73 (1.17-2.55), and 2.31 (1.38-3.87), respectively, when compared with non-dyslipidemia/non-drinkers. The area under the ROC curve for a model containing dyslipidemia and drinking status along with conventional factors (AUC=0.746) was significantly (P=0.003) larger than the one containing only conventional factors (AUC=0.711).

CONCLUSIONThe present study showed that dyslipidemia was an independent risk factor for diabetes, and that drinkers with dyslipidemia had the highest risk of diabetes in the Mongolian population. These findings suggest that dyslipidemia and drinking status may be valuable in predicting diabetes incidence.

Adult ; Alcohol Drinking ; adverse effects ; epidemiology ; China ; epidemiology ; Cholesterol, HDL ; metabolism ; Cholesterol, LDL ; metabolism ; Diabetes Mellitus ; epidemiology ; etiology ; metabolism ; Dyslipidemias ; complications ; epidemiology ; Female ; Follow-Up Studies ; Humans ; Incidence ; Male ; Middle Aged ; Mongolia ; epidemiology ; Prospective Studies ; ROC Curve ; Risk Factors

OBJECTIVEWe aimed to investigate the cumulative effect of high CRP level and apolipoprotein B-to-apolipoprotein A-1 (ApoB/ApoA-1) ratio on the incidence of ischemic stroke (IS) or coronary heart disease (CHD) in a Mongolian population in China.

METHODSFrom June 2003 to July 2012, 2589 Mongolian participants were followed up for IS and CHD events based on baseline investigation. All the participants were divided into four subgroups according to C-reactive protein (CRP) level and ApoB/ApoA-1 ratio. Cox proportional hazard models were used to estimate the hazard ratios (HRs) and 95% confidence intervals (CIs) for the IS and CHD events in all the subgroups.

RESULTSThe HRs (95% CI) for IS and CHD were 1.33 (0.84-2.12), 1.14 (0.69-1.88), and 1.91 (1.17-3.11) in the 'low CRP level with high ApoB/ApoA-1', 'high CRP level with low ApoB/ApoA-1', and 'high CRP level with high ApoB/ApoA-1' subgroups, respectively, in comparison with the 'low CRP level with low ApoB/ApoA-1' subgroup. The risks of IS and CHD events was highest in the 'high CRP level with high ApoB/ApoA-1' subgroup, with statistical significance.

CONCLUSIONHigh CRP level with high ApoB/ApoA-1 ratio was associated with the highest risks of IS and CHD in the Mongolian population. This study suggests that the combination of high CRP and ApoB/ApoA-1 ratio may improve the assessment of future risk of developing IS and CHD in the general population.

Adult ; Apolipoproteins A ; classification ; genetics ; metabolism ; Apolipoproteins B ; genetics ; metabolism ; C-Reactive Protein ; genetics ; metabolism ; Cohort Studies ; Coronary Disease ; epidemiology ; etiology ; Gene Expression Regulation ; Humans ; Mongolia ; epidemiology ; Prospective Studies ; Risk Factors ; Stroke ; epidemiology ; etiology ; Young Adult

The objective of this study was to evaluate the usefulness of the China-PAR equations in predicting the 10-year risk of cardiovascular disease (CVD) in the Inner Mongolians population. A population-based, prospective cohort of 2,589 Mongolians were followed up from 2003 to 2012. Participants were categorized into 4 subgroups according to their 10-year CVD risks calculated using the China-PAR equations: < 5%, 5%-9.9%, 10%-19.9%, and ⪖ 20%. The China-PAR equations discriminated well with good C statistics (range, 0.76-0.86). The adjusted hazard ratios for CVD showed an increasing trend among the 4 subgroups (P for trend < 0.01). However, the China-PAR equations underestimated the 10-year CVD risk in Mongolians, and the calibration was unsatisfactory (Hosmer-Lemeshow χ2 = 19.98, P < 0.01 for men, χ2 = 46.58, P < 0.001 for women). The performance of the China-PAR equations warrants further validation in other ethnic groups in China.
Asian Continental Ancestry Group ; Cardiovascular Diseases ; epidemiology ; Cerebrovascular Disorders ; epidemiology ; China ; epidemiology ; Cohort Studies ; Female ; Humans ; Incidence ; Male ; Middle Aged ; Mongolia ; ethnology ; Proportional Hazards Models ; Prospective Studies ; Risk Assessment ; Risk Factors