|Year : 2015 | Volume
| Issue : 3 | Page : 163-169
|Assessment of the awareness level of dental students toward Middle East Respiratory Syndrome-coronavirus
Mohamed Yasser Kharma1, Mohamad Sadek Alalwani2, Manal Fouad Amer3, Bassel Tarakji4, Ghassan Aws5
1 Department of Oral Maxillofacial Surgery, Al-Farabi Colleges, Aleppo University, Jeddah, Saudi Arabia
2 Department of Immunology, Al-Farabi Colleges, Aleppo University, Jeddah, Saudi Arabia
3 Department of Nursing, Cairo University, Egypt
4 Department of Oral Medicine, Al-Farabi Colleges, Aleppo University, Jeddah, Saudi Arabia
5 Department of Oral Sciences, Al-Farabi Colleges, Aleppo University, Jeddah, Saudi Arabia
|Date of Web Publication||3-Jul-2015|
Mohamed Yasser Kharma
Al-Farabi Colleges of Dentistry, Jeddah
Source of Support: None, Conflict of Interest: None
| Abstract|| |
Background: Infection prevention and control measures are critical to prevent the possible spread of Middle East Respiratory Syndrome-coronavirus (MERS-CoV) in healthcare facilities. Therefore, healthcare workers should be aware of all procedures concerning prevention of and protection from MERS-CoV. Objective: The aim of this study is to improve the knowledge of the dental students and evaluate their awareness about MERS-CoV. Materials and Methods: A questionnaire was made according to MOH information and 200 dental students (Al-Farabi Colleges, Jeddah) were interviewed to evaluate their knowledge about MERS-CoV. Results: More than half of the dental students (54%) interviewed had good knowledge about the etiology, symptoms, and treatment of MERS-CoV. Measurements for infection control and protection were also known (79%). The sources of information for the students were: college (27%), MOH (25%), media (24%), and social community (23%), while 17% of the students interviewed had no idea about it. Conclusion: Dental students had good knowledge about MERS-CoV. However, more information still must be provided by MOH and college for the medical staff.
Keywords: Aerosol infection, coronavirus, Middle east respiratory syndrome, respiratory infection-health-care workers, virus infection
|How to cite this article:|
Kharma MY, Alalwani MS, Amer MF, Tarakji B, Aws G. Assessment of the awareness level of dental students toward Middle East Respiratory Syndrome-coronavirus. J Int Soc Prevent Communit Dent 2015;5:163-9
|How to cite this URL:|
Kharma MY, Alalwani MS, Amer MF, Tarakji B, Aws G. Assessment of the awareness level of dental students toward Middle East Respiratory Syndrome-coronavirus. J Int Soc Prevent Communit Dent [serial online] 2015 [cited 2020 Aug 11];5:163-9. Available from: http://www.jispcd.org/text.asp?2015/5/3/163/159951
| Introduction|| |
Middle East Respiratory Syndrome-coronavirus (MERS-CoV) is a major global concern. MERS-CoV was first reported in September 2012, when a novel β coronavirus was isolated from a Saudi Arabian patient in Jeddah, who had died of severe pneumonia and multiple organ failure in June 2012.  This novel coronavirus has been named Middle East Respiratory Syndrome-coronavirus.  MERS-CoV can also infect nonhuman primate, porcine, bat, civet, rabbit, and horse cell lines. ,,
Since April 2012, over 1100 laboratory-confirmed human infections with MERS-CoV have been reported to the World Health Organization (WHO), occurring in several countries in the Arabian Peninsula, including Jordan, Kuwait, Lebanon, Oman, Qatar, Saudi Arabia, the United Arab Emirates, and Yemen. The majority of cases (>85%) have occurred in Saudi Arabia, including some case clusters. , In the European and Asian countries as well as in Algeria, Egypt, Tunisia, and the United States, patients developed illness after returning from the Arabian Peninsula. There have been a total of 572 cases of MERS-CoV infection reported by WHO globally as of May 15, 2014, with 173 deaths (30% mortality rate). 
Possible sources and modes of transmission
0Studies performed in Europe, Africa, and Asia, including the Middle East, have shown that coronavirus RNA sequences are found frequently in bat fecal samples and that some of these sequences are closely related to MERS-CoV sequences. ,,
Although bats might be a reservoir of MERS-CoV, it is unlikely that they are the immediate source for most human cases because human contact with bats is uncommon. 
As noted above, it is likely that camels serve as hosts for MERS-CoV. The strongest evidence of camel-to-human transmission of MERS-CoV comes from a study in Saudi Arabia, in which MERS-CoV was isolated from a man with fatal infection and from one of his camels; full-genome sequencing demonstrated that the viruses isolated from the man and his camel were identical. 
These results suggest that MERS-CoV can infect dromedary camels and can be transmitted from them to humans by close contact.
Camels in the Arabian Peninsula and in part of North and East Africa have been shown to carry the virus.  However, it is still too early to say definitely that they are the main source of primary infections in humans. Younger animals seem to be virus-positive more often than adult animals. As young camels lose their maternal immunity, they become more susceptible to MERS-CoV infection. The high number of MERS-CoV cases (229 cases) reported between April 11, 2014 and May 4, 2014 by Saudi Arabia were probably seasonal, related to the birthing season of camels. 
According to Ziad Memish, Saudi Arabia's Deputy, professor in the College of Medicine at Al Fasial University in Riyadh (See Reference: www.thelancet.com Volume 383/May 24/2014), "more than two-thirds of the primary human cases have no links to camels." He suggested the possibility of another species in acting as an intermediary. After a bat of the Taphozous genus was found in a fragments of the MERS sequence,  bats have been accused as a possible source of transmission. But contacts between bats and people are rare, and this idea still needs more study and is considered a hypothesis.
More than half of all laboratory-confirmed secondary cases have been associated with healthcare settings.  The majority of cases in the spring of 2014 in Saudi Arabia were acquired through human-to-human transmission in healthcare settings, likely due, at least in part, to systemic weaknesses in infection control. ,,
For epidemiologic purposes, the following MERS-CoV infection case definitions have been proposed by the WHO:  Confirmed case by laboratory confirmation or Probable case by symptoms and signs.
In an outbreak of MERS-CoV in Saudi Arabia that resulted in laboratory-confirmed MERS-CoV in 23 individuals, the median incubation period was 5.2 days (95% CI: 1.9-14.7 days). 
The WHO and the United States Centers for Disease Control and Prevention (CDC) recommend that an evaluation for MERS-CoV be considered in individuals with a syndrome of MERS who returned from travel to the Arabian peninsula or neighboring countries within the past 14 days. 
Most patients with MERS-CoV infection have been severely ill with pneumonia and acute respiratory distress syndrome, and some have had acute kidney injury. ,,,,,
It remains unclear whether persons with specific conditions are disproportionately infected with MERS-CoV or have more severe disease.  In a study of 47 patients with MERS-CoV infection in Saudi Arabia, 45 (96%) had underlying comorbidities, including diabetes mellitus (68%), hypertension (34%), chronic cardiac disease (28%), and chronic kidney disease (49%).  The mortality rate is around 30%, and there is currently no vaccine or specific treatment available. 
People with diabetes, renal failure, chronic lung disease, and immunocompromised patients are considered to be at high risk of severe disease from MERS-CoV infection. Therefore, these people should avoid contact with camels, drinking camel's urine, or eating meat that has not been properly cooked. 
The WHO emergency committee concluded that the number of cases reported among healthcare workers from hospitals in Jeddah was amplified due to overcrowding and inadequate infection control measures. 
Acute viral respiratory tract infections, such as severe acute respiratory syndrome (SARS) and MERS, predominantly spread by large respiratory droplets (≥10 μm in diameter) during coughing and sneezing, whereas contact with fomite (including hand contamination) might be another potential source of transmission. ,
The MERS-CoV outbreak in Jeddah and the importance of the knowledge of etiology and protection from MERS-CoV led us to conduct this study on dental students, with an aim to evaluate their knowledge and awareness of MERS-CoV.
As with other coronaviruses, no antiviral agents are recommended for the treatment of MERS-CoV infection.  In a retrospective cohort study in patients with severe MERS-CoV infection, combination therapy with ribavirin and interferon alfa-2a, started a median of 3 days after diagnosis (20 patients), was associated with significantly improved survival at 14 days, compared with 24 patients who received only supportive care (70 vs 29% survival), but the outcome was not significant at 28 days (30 vs 17% survival, a nonsignificant difference). ,, It is difficult to interpret the results of this retrospective study, and further evaluation by conducting randomized trials is needed before treatment recommendations can be made.
The WHO and the CDC have issued recommendations for the prevention and control of MERS-CoV infections in healthcare settings. ,, An increased level of infection control precautions is recommended when caring for patients with probable or confirmed MERS-CoV infection, compared to that used for patients with community-acquired coronaviruses or other community-acquired respiratory viruses.
The WHO recommends that standard and droplet precautions must be used when caring for patients with acute respiratory tract infections.  Contact precautions and eye protection should be added when caring for probable or confirmed cases of MERS-CoV infection. Airborne precautions should be used when performing aerosol-generating procedures. The CDC recommends the use of standard, contact, and airborne precautions for the management of hospitalized patients with known or suspected MERS-CoV infection. ,,
Interim home care and isolation
The CDC recommends that ill individuals who are being evaluated for MERS-CoV infection and do not require hospitalization may be cared for and isolated in their home. 
The WHO recommends that individuals at high risk of severe disease, such as immunocompromised hosts and those with diabetes, chronic lung disease, or pre-existing renal failure, should take precautions when visiting farms, barn areas, camel pens, or market environments where camels are present.  These measures include avoiding contact with camels, practicing good hand hygiene, avoiding drinking raw camel milk or camel urine, avoiding eating meat that has not been cooked thoroughly, and avoiding eating food that may be contaminated with animal secretions or products unless they are properly washed, peeled, or cooked.
The WHO does not recommend either special screening for MERS-CoV at points of entry or the application of any travel or trade restrictions. However, the WHO recommends that countries outside the affected region maintain a high level of vigilance, especially the ones with a large numbers of travelers or guest workers returning from the Middle East. 
| Materials and Methods|| |
Study participants were recruited from among the dental students of Al-Farabi College, Jeddah (high level 9 + 10 - male and female) who are in direct contact with the patients and this was considered as the main criterion of selection.
The questionnaire contained 12 questions which were formulated based on the information given by MOH for MERS-CoV. The questionnaire was edited in English and distributed to the dental group (see the questionnaire in Appendix 1 [Additional file 1] ).
The questionnaire was divided into multiple sections to assess definition, symptoms, source of infection, infection control, protection, and treatment. The questionnaire included specific questions exploring the knowledge, such as rate of mortality, period of incubation, and way of spreading; a single-item scale was used to record the respondents' replies.
| Results|| |
There were 200 respondents in the study. The respondents comprised 81 (40%) male and 119 (60%) female. More than 73% (145) of respondents were under 25 years and 27% (55) were over 25 years of age. About 44% of respondents knew the definition of MERS as Middle East Respiratory Syndrome and 27% knew other definitions, while 18% of respondents had no idea. Furthermore, 27% of respondents had gained their knowledge about MERS from college and 25% from MOH, while 17% of respondents had no idea. The majority of respondents (75%) considered that MERS is contagious and 54% knew related symptoms such as severe acute respiratory illness, fever, cough, and gastrointestinal symptoms [Figure 1]. One-third of the respondents 27% were aware that the period of incubation for MERS is about 2-14 days.
A sizable proportion (48%) of the respondents reported that the source of MERS-CoV is camels, 18% gave the answer as bats, and 32% had no idea [Figure 2]. More than two-thirds (64%) of the respondents knew that close contact with confirmed MERS patient spreads the infection and 79% applied methods of protection such as washing hands with alcohol sanitizer, using mask, goggles, and avoiding personnel contact with the confirmed patient [Figure 3]. Also, 52% of respondents could distinguish between SARS and MERS. One-third of the respondents reported that the percentage of death in MERS is about 30% and 77% knew that there is no vaccination for MERS. Also, two-thirds of the respondents (60%) considered that the treatment is supportive based on clinical condition of the patient.
| Discussion|| |
The respondents in this study had higher education level (level 9-10 dental school) according to their level in dental school and were mainly female (60%), which indicates that females are more concerned with medical outbreak of the disease than males.
About 44% of respondents knew the definition of MERS and that MERS-CoV is an airborne pathogen, 54% recognized the symptoms, and 48% realized that the probable source of MERS virus is camels, while 64% were aware about the way of spreading by close contact and 79% had knowledge of instructions and measures for protection. However, this finding at least reveals respondents' awareness of mode of transmission and the importance of following the instructions for protection.
Aerosol is now considered the major route of MERS transmission.  Respondents identified that close contact with a patient of MERS-CoV is one of the main routes of spreading the virus (64%). Also, a high proportion (79%) of respondents was aware about the instructions of protection. So, this indicates that the information related to the way of contamination and spreading of MERS-CoV and the measures for protection is well known.
Perception about infection control
The main infection prevention and control measures for managing acute viral respiratory tract infection are simple and well documented. ,,
First droplet precaution is wearing a surgical mask within 1 m of the patient; contact precaution is also important by wearing gown and gloves on entering the room and removing them on leaving. Eye protection should be added when caring for probable or confirmed cases of MERS-CoV infection.
However, the majority of respondents (79%) were aware of the measures adopted for protection and 75% knew that MERS-CoV is contagious, and therefore, it is very important to apply the methods of protection.
From the results of this survey, it is very encouraging to conclude that our dental students had good knowledge of MERS-CoV (etiology, symptoms, protection) and this may reflect the successful distribution of the information about MERS-CoV by college 27% and MOH 25%. More awareness of MERS-CoV hazards is required by medical staff who are the first people in contact with patients infected by the virus.
Our data indicate the necessity for further continuing education among medical staff, as well as improving public education about infection control.
The MERS-CoV outbreak in Jeddah and the increasing number of healthcare workers affected remind us of the need to acquire the basics information of infection control which is the main principle for protection from MERS-CoV.
Summary and recommendations
- A novel coronavirus, MERS-CoV, causing severe respiratory illness emerged in 2012 in Saudi Arabia. MERS-CoV is closely related to coronaviruses found in bats, suggesting that bats might be a reservoir of MERS-CoV. Camels likely serve as hosts for MERS-CoV. The presence of case clusters strongly suggests that human-to-human transmission occurs
- There is currently no treatment recommended for coronavirus infections, except for supportive care as needed
- An increased level of infection control precautions is recommended when caring for patients with MERS-CoV infection
- Dental students had good knowledge about MERS-CoV. However, more information still must be provided by MOH and college for medical staff
- We emphasized on the necessity of providing more information about prevention of any susceptible viral infection to the healthcare workers.
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[Figure 1], [Figure 2], [Figure 3]
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