scholarly journals Prevalence, distribution on host's body, and chemical control of camel ticks Hyalomma dromedarii in the United Arab Emirates

2020 ◽  
Vol 13 (1) ◽  
pp. 114-120 ◽  
Author(s):  
Mohammad Ali Al-Deeb ◽  
Sabir Bin Muzaffar
Keyword(s):  
United Arab Emirates ◽  
Tick Control ◽  
The Body ◽  
Entire Body ◽  
Control Methods ◽  
Hyalomma Dromedarii ◽  
Global Circulation ◽  
Al Ain ◽  
Tick Counts ◽  
Tick Load

Background and Aim: Camel farming remains a part of the culture of the Arabian Peninsula although modern methods have greatly increased camel densities in the entire region. In the United Arab Emirates (UAE), camel production is threatened by tick parasitism. However, no study has considered assessing the magnitude of the problem in the UAE. We conducted a study evaluating tick richness, abundance, and spatial distribution of ticks on camels in farms near Al Ain, UAE. In addition, we conducted a survey of farm owners to determine the control methods used to eliminate camel ticks. Materials and Methods: Tick counts were made on 502 camels (Camelus dromedarius). For each examined animal, visual counts of ticks were made on the entire body segregating the counts by head, neck, forelegs, hump, abdomen, back legs, and tail area. In addition, a total of 70 camel owners from the study area were randomly selected and surveyed about the tick control methods. Results: Hyalomma dromedarii was the only species found during the study. The prevalence of ticks was 98% among the sampled animals. The mean intensity (tick load) was 25.8±2.4 ticks/host and the maximum number of ticks per animal was 102. Ticks were found in five vicinities that are on the border with Oman. The highest number of ticks on the body of the camel occurred on the tail area followed by the abdomen. Cypermethrin was the most commonly used acaricide (46.9%). Conclusion: The high abundance of ticks reported in this study calls for the establishment of a good management strategy. In addition, finding ticks in vicinities in the UAE that are on the border with Oman suggests a cross-border movement between the two countries. Therefore, studying this movement is important to understand its role in the global circulation of some H. dromedarii tick-borne diseases and the movement of acaricide resistance alleles among tick populations.

scholarly journals Population Dynamics of Hyalomma dromedarii on Camels in the United Arab Emirates

Insects ◽  
2020 ◽  
Vol 11 (5) ◽  
pp. 320 ◽  
Author(s):  
Nighat Perveen ◽  
Sabir Bin Muzaffar ◽  
Mohammad Ali Al-Deeb
Keyword(s):  
Population Dynamics ◽  
United Arab Emirates ◽  
Management Practices ◽  
Life Stage ◽  
Effective Control ◽  
Hyalomma Dromedarii ◽  
Infestation Intensity ◽  
Al Ain ◽  
Continuous Presence ◽  
Very High

Hyalomma dromedarii is the most important tick species infesting camels in the Middle East. So far, there are no studies on the population dynamics of H. dromedarii ticks on camels in the United Arab Emirates (UAE). Thus, the current study was performed: (1) to assess H. dromedarii population dynamics under common camel breeding and management practices in the study area, (2) to evaluate H. dromedarii life stage changes and sex ratio over time, and (3) to measure parasitological indicators of H. dromedarii infestation. We conducted monthly on-site tick visual counts and collection from camels in Al Ain, UAE, over 12 months. Our results show that the infestation prevalence was very high during the whole study period, with a mean of 94.33%. The maximum infestation intensity occurred in June, while the minimum occurred in January. Overall, H. dromedarii ticks were found on camels during the entire year in spite of monthly applications of an acaricide. This study reveals that H. dromedarii has a very high prevalence and continuous presence on camels in the UAE regardless of the weather fluctuations and acaricide applications and showed the need for an effective control strategy.

Biologic risk factors for low birthweight in Al Ain, United Arab Emirates

1996 ◽  
Vol 8 (3) ◽  
pp. 341-345 ◽  
Author(s):  
Adekunle Dawodu ◽  
Yousef M. Abdulrazzaq ◽  
Abdulbari Bener ◽  
Inge Kappel ◽  
Larry Liddle ◽  
...  
Keyword(s):  
Risk Factors ◽  
United Arab Emirates ◽  
Low Birthweight ◽  
Al Ain

Surface ultrastructure of juvenile and adult stages of Centrocestus armatus

1998 ◽  
Vol 72 (3) ◽  
pp. 215-219 ◽  
Author(s):  
Ho-Choon Woo ◽  
Myung-Deuk Seo ◽  
Sung-Jong Hong
Keyword(s):  
Oral Sucker ◽  
Body Surface ◽  
Dorsal Surface ◽  
High Density ◽  
The Body ◽  
Albino Rats ◽  
Entire Body ◽  
Type Ii ◽  
Posterior Half ◽  
Surface Ultrastructure

AbstractCentrocestus armatus (Trematoda: Heterophyidae) develops rapidly and produces eggs at 3 days postinfection in albino rats. Excysted metacercariae are pear-shaped and concave ventrally, with 42–44 peg-like circumoral spines. The entire body surface is densely covered with scale-like serrated spines. On juveniles, serration of the tegumental spines is greatest in the middle of the ventral and dorsal surfaces, and decreases anteriorly and posteriorly. Ciliated sensory papillae are concentrated around the oral sucker. Several nonciliated sensory papillae (type II papillae) occur equidistantly on the acetabulum and are arranged in a linear symmetry on the dorsal surface. On adults, the serration of the tegumental spines decreases to 14–17 tips on the ventrolateral surface. The high density of tegumental spines on posterior half of the body and the distribution of type II papillae on dorsal surface are considered to be characteristic of C. armatus.

A Benchmark Control Problem for Supercavitating Vehicles and an Initial Investigation of Solutions

2003 ◽  
Vol 9 (7) ◽  
pp. 791-804 ◽  
Author(s):  
John Dzielski ◽  
Andrew Kurdila
Keyword(s):  
High Speed ◽  
Linear Models ◽  
The Body ◽  
Control Surface ◽  
Force Model ◽  
Entire Body ◽  
Benchmark Problem ◽  
Supercavitating Vehicles ◽  
Forcing Function ◽  
Natural Cavitation

At very high speeds, underwater bodies develop cavitation bubbles at the trailing edges of sharp corners or from contours where adverse pressure gradients are sufficient to induce flow separation. Coupled with a properly designed cavitator at the nose of a vehicle, this natural cavitation can be augmented with gas to induce a cavity to cover nearly the entire body of the vehicle. The formation of the cavity results in a significant reduction in drag on the vehicle and these so-called high-speed supercavitating vehicles (HSSVs) naturally operate at speeds in excess of 75 m s-1. The first part of this paper presents a derivation of a benchmark problem for control of HSSVs. The benchmark problem focuses exclusively on the pitch-plane dynamics of the body which currently appear to present the most severe challenges. A vehicle model is parametrized in terms of generic parameters of body radius, body length, and body density relative to the surrounding fluid. The forebody shape is assumed to be a right cylindrical cone and the aft two-thirds is assumed to be cylindrical. This effectively parametrizes the inertia characteristics of the body. Assuming the cavitator is a flat plate, control surface lift curves are specified relative to the cavitator effectiveness. A force model for a planing afterbody is also presented. The resulting model is generally unstable whenever in contact with the cavity and stable otherwise, provided the fin effectiveness is large enough. If it is assumed that a cavity separation sensor is not available or that the entire weight of the body is not to be carried on control surfaces, limit cycle oscillations generally result. The weight of the body inevitably forces the vehicle into contact with the cavity and the unstable mode; the body effectively skips on the cavity wall. The general motion can be characterized by switching between two nominally linear models and an external constant forcing function. Because of the extremely short duration of the cavity contact, direct suppression of the oscillations and stable planing appear to present severe challenges to the actuator designer. These challenges are investigated in the second half of the paper, along with several approaches to the design of active control systems.

The philometrid nematodePhilometroides acreanensis n. sp. from the stomach wall of the catfishPimelodus blochiiin north-western Brazil

2017 ◽  
Vol 92 (1) ◽  
pp. 109-115 ◽  
Author(s):  
P.H.O. Cavalcante ◽  
F. Moravec ◽  
C.P. Santos
Keyword(s):  
Body Length ◽  
Gravid Female ◽  
Drainage System ◽  
Nematode Species ◽  
Fish Host ◽  
The Body ◽  
Stomach Wall ◽  
Amazon River ◽  
Entire Body ◽  
South American

AbstractA new nematode species,Philometroides acreanensisn. sp. (Philometridae), is described from female specimens recovered from the stomach wall of the freshwater catfishPimelodus blochiiValenciennes (Pimelodidae) collected in the Acre River (Amazon River basin), Acre State, Brazil. Based on examination by light and scanning electron microscopy, the new species differs from the two other South American congeneric species mainly in the body length of the gravid female (240–280 mm), the length of the oesophagus (1.25 mm in holotype) representing 0.5% of the entire body length, the range of cuticular embossment, as well as the location in the host (stomach), order of the fish host (Siluriformes) and the geographical distribution (Amazon River drainage system). This is the third known species ofPhilometroidesYamaguti, 1935 reported from South America. A key to species ofPhilometroidesoccurring in the fish of America is provided.

Examining the relationship between the psychological contract and organisational commitment

2015 ◽  
Vol 23 (1) ◽  
pp. 102-122 ◽  
Author(s):  
Fauzia Jabeen ◽  
Mohamed Behery ◽  
Hossam Abu Elanain
Keyword(s):  
Transformational Leadership ◽  
Longitudinal Study ◽  
Transactional Leadership ◽  
United Arab Emirates ◽  
Psychological Contract ◽  
The Body ◽  
Mediating Effect ◽  
Organisational Commitment ◽  
Content Type ◽  
The Impact

Purpose – The aim of this study is to examine the impact of the psychological contract, relational psychological contract and transactional psychological contract on organisational commitment as mediated by transactional leadership in the United Arab Emirates (UAE) context. The paper also explores the contractual status to determine if the theory remains valid, regardless of the fact whether one is employed as a contingent or permanent worker. Design/methodology/approach – This research made a longitudinal study spanning a 24-week time period. Data were collected using a self-administered structured questionnaire prepared in English and Arabic, at three stages representing three visits to the participating companies in the UAE. Pearson’s correlation analysis and multiple regression analysis were used to examine the research hypotheses. Findings – The results show that the psychological contracts (transactional and relational) are positively related to transactional leadership. This study categorizes several consequential relationships between transactional leadership and organisational commitment. It also advocates that transactional leadership has only a fractional mediating role in relation to relational psychological contract, transactional psychological contract and organisational commitment. Practical implications – The findings suggest that practitioners and academics alike should note that the nature of the psychological contract employed will impact upon commitment and retention. Originality/value – This study makes a significant contribution to the body of literature, being the second part of a longitudinal study that aimed at testing the mediating effect of transactional leadership on organisational commitment within the context of the UAE. In the earlier study, the intent was to analyse the role of transformational leadership as a mediator between the psychological contract and organisational commitment. Typically, transformational leadership has been found to partially mediate the above mentioned relationships. In addition, it also advocates that there may be some value in considering the employees’ contractual status with regard to the psychological contract and its impact on organisational commitment.

scholarly journals The effect of religion on the perception of health states among adults in the United Arab Emirates: a qualitative study

BMJ Open ◽  
2017 ◽  
Vol 7 (10) ◽  
pp. e016969 ◽  
Author(s):  
Iffat Elbarazi ◽  
Nancy J Devlin ◽  
Marina-Selini Katsaiti ◽  
Emmanuel A Papadimitropoulos ◽  
Koonal K Shah ◽  
...  
Keyword(s):  
United Arab Emirates ◽  
Shopping Malls ◽  
Structured Interviews ◽  
Health States ◽  
Public Places ◽  
Al Ain ◽  
Value Sets ◽  
And Gender ◽  
Perception Of Health

ObjectivesInvestigate how religion may affect the perception of health states among adults in the United Arab Emirates and the implications for research on self-reported health and quality of life and the use of values in cost-effectiveness analysis.DesignQualitative analysis of short-structured interviews with adult Emiratis carried out by a market research agency.The COREQ criteria have been used where appropriate to guide the reporting of our findings.SettingParticipants were recruited from shopping malls and other public places in the cities of Al Ain and Abu Dhabi.ParticipantsTwo hundred adult Emiratis broadly representative of the Emirati population in terms of age and gender.ResultsEighty one per cent of participants said that their perception of health states was influenced by their spiritual or religious beliefs. The two overarching themes that seemed to explain or classify these influences were ‘fatalism’ and ‘preservation of life’. Subthemes included powerlessness to change what is preordained by God, fear of disability (particularly diminished mobility) and appreciation of health and life and the requirement to look after one’s health. A final theme was that of acceptance, with respondents expressing a willingness to endure suffering and disability with patience in the expectation of rewards in the hereafter.ConclusionsOur results emphasise the need for further work to establish locally relevant value sets for Muslim majority countries in the Middle East and elsewhere for use in health technology assessment decision-making, rather than relying on value sets from other regions.

Effect of shodhana and shamana chikitsa in mandala kustha (psoriasis): A case study

2019 ◽  
Vol 7 (03) ◽  
Author(s):  
Jyoti Bala Sahu
Keyword(s):  
Body Temperature ◽  
The Body ◽  
Entire Body ◽  
Men And Women ◽  
Remarkable Improvement ◽  
Males And Females ◽  
Regulate Body Temperature ◽  
Old Men

Skin is the largest organ of the body both by surface area and weight. This covers the entire body. The thickness of skin varies considerably over all parts of the body and between young and old, men and women. It helps to regulate body temperature, stores water fat and permit sensation of touch. Psoriasis is a chronic dermatosis characterized by covered by silvery loose scales. Treatment available on contemporary system is not curative but suppressive only. The prevalence of psoriasis is 8%. Prevalence equal in males and females. A case of Mandala Kustha discussed here. Patient successfully treated with Shodhana (Virechana karma) & Shamana Chikitsa. After course of 2 months treatment provides significant relief in Sign and Symptoms. In our classics mentioned Shodhana Chikitsa for Kustha Roga. Considering the sign and symptoms of patient was treated with classical Virechana karma (therapeutic purgation) and Shamana Chikitsa according to line of treatment of Kustha (Psoriasis). Assessment was done on before treatment, after treatment and after follow up of 2 months; pictures were taken before treatment and after treatment. Remarkable improvement was noticed, induration and itching after Virechana treatment.

Active head movements facilitate compensation for effects of prism displacement on dynamic gait12

2006 ◽  
Vol 16 (1-2) ◽  
pp. 29-33
Author(s):  
Kim R. Gottshall ◽  
Michael E. Hoffer ◽  
Helen S. Cohen ◽  
Robert J. Moore
Keyword(s):  
Head Movement ◽  
Sensory Modality ◽  
Normal Subjects ◽  
The Body ◽  
Head Movements ◽  
Head Motion ◽  
Control Group ◽  
Entire Body ◽  
Group 3 ◽  
Group 2

Study design: Four groups, between-subjects study. Objectives: To investigate the effects of exercise on adaptation of normal subjects who had been artificially spatially disoriented. Background: Many patients referred for rehabilitation experience sensory changes, due to age or disease processes, and these changes affect motor skill. The best way to train patients to adapt to these changes and to improve their sensorimotor skills is unclear. Using normal subjects, we tested the hypothesis that active, planned head movement is needed to adapt to modified visual input. Methods and measures: Eighty male and female subjects who had normal balance on computerized dynamic posturography (CDP) and the dynamic gait index (DGI), were randomly assigned to four groups. All groups donned diagonally shift lenses and were again assessed with CDP and DGI. The four groups were then treated for 20 min. Group 1 (control group) viewed a video, Group 2 performed exercise that involved translating the entire body through space, but without separate, volitional head movement, Group 3 performed exercises which all incorporated volitional, planned head rotations, and Group 4 performed exercises that involved translating the body (as in Group 2) and incorporated volitional, planned head motion (as in Group 3). All subjects were post-tested with CDP and DGI, lenses were removed, and subjects were retested again with CDP and DGI. Results: The groups did not differ significantly on CDP scores but Groups 3 and 4 had significantly better DGI scores than Groups 1 and 2. Conclusions: Active head movement that is specifically planned as part of the exercise is more effective than passive attention or head movements that are not consciously planned, for adapting to sensorimotor change when it incorporates active use of the changed sensory modality, in this case head motion.

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