Observance of Standard Precautions for Infection Prevention in the COVID-19 Era: A Cross Sectional Study in Six District Hospitals in Yaounde, Cameroon

Fabrice Zobel Lekeumo Cheuyem; Emilia Enjema Lyonga; Jonathan Hangi Ndungo; François–Xavier Mbopi–Keou; Innocent Takougang

doi:10.20944/preprints202307.1136.v1

Submitted:

16 July 2023

Posted:

18 July 2023

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Preprints on COVID-19 and SARS-CoV-2

Abstract

Introduction: Interest in infection prevention in healthcare facilities has been renewed with the advent of the COVID – 19 pandemic. Accidental exposures to body fluids occurs under work environments that do not meet occupational safety standards. The aim of the present study was to assess the level of observance of standard precautions including adherence to required vaccinations to prevent healthcare related infections. Methods: A cross sectional descriptive study was carried out from January to April 2022 in six District Hospitals in Yaounde. An auto-administered questionnaire was addressed to consenting healthcare workers. Data were analysed using R statistic version 4.2.3. A p-value < 5% was considered significant. Results: Out of a total of 217 HCW who were enrolled, nearly a quarter (17%) claimed to wash the scalpel blades for reuse. More than half of the participants (53.5%) did not wash their hands after each care. Reasons for not washing hands after each procedure were the perception that the patient care for was risk free (36 %), high workload (35.3 %), distant washing point (20 %). Almost half of HCW (46,5%) experienced a splash during the last 12 month. PPE were always available for only 43.56% of participants. Immunization coverage for COVID-19 was low 44.8 %. Poor vaccine compliance was related to doubts on vaccine content (42 %) and fear of adverse events (39.3 %). Conclusion: Strategies should be implemented to alleviate the AEB burden among healthcare workers and increase compliance with COVID-19 and other vaccines required for healthcare practice.

Keywords:

standard precautions

;

occupational exposure

;

personal protective equipment

;

COVID-19

;

vaccination

;

Yaounde hospital

;

cameroon

Subject:

Public Health and Healthcare - Public Health and Health Services

Introduction

Up to three million healthcare workers (HCW) are exposed to body fluid and resulting bloodborne pathogens each year, causing more than 170 000 HIV infections, two million viral hepatitis B (HBV) and 0,9 million viral hepatitis C (HCV) [1]. Some of these infections result from poor compliance with standard precautions while providing health services [1,2].

The implementation of standard precautions within healthcare facilities aim to curve the transmission of infections. Standard precautions include administrative aspects of infection control measures, use of personal protective equipment (PPE), engineering and environmental measures [4]. Insufficient adherence to standard precautions have been linked to poor supply of PPE and factors related to work environment [5]. Several institutional and healthcare workers related factors affect compliance with standard precautions, especially in resource limited countries [6]. Low compliance with adequate precautions leads to high vulnerability of HCW. All categories of health facilities are affected, including reference hospitals where a high prevalence of accidental exposure to body fluids and poor coverage with required vaccines has been reported among HCW [7]. Splashes occur frequently among midwives and nurses where they involve mucous membranes or skin breaches [8,9]. Most of such accidental exposures occur during childbirth, in surgical room during pulsatile lavage [10,11]. It is also frequently observed in almost every manual cleaning activity especially those involving running the faucet and rinsing soiled medical devices [12,13]. Interest in the control and prevention of infections in healthcare settings has been renewed with the advent of the Severe Acute Respiratory Syndrome due to Corona Virus (COVID – 19) and its inclusion in the list of diseases transmitted by contaminated expectorations [14]. HCW are four times greater risk of contracting HBV and COVID-19 infections than the general population [15]. Vaccination is the most cost-efficient intervention for transmissible diseases prevention. In preventing healthcare associated infections, many countries recommend that HCW receive shots against influenza, hepatitis B, pertussis, measles, rubella, mumps, varicella, tetanus, diphtheria and COVID-19 [16]. Vaccine administration aims to stimulate host immunity. Vaccines are typically whole virus, protein subunit, viral vector or pathogen nucleic acid [15-16]. Even though HCW are considered a priority intervention group for COVID-19 vaccination, unconfirmed reports indicated vaccine hesitancy as a barrier to its uptake [18].

The present study aimed to assess the level of implementation of infection control measures in reference health facilities, inclusive of compliance with vaccination during the COVID-19 epidemic.

Methods

Study design & period: We conducted an institutional-based cross-sectional study in the six district hospitals of Yaounde from January to April, 2022.

Setting: The Cameroonian health system is organised around health districts. The district hospital is the first level of reference in the health pyramid. It is responsible for providing primary health cares to the population [19]. The Yaounde DHs (Biyem Assi, Cite Verte, Djoungolo, Efoulan, Mvog Ada and Nkolndongo) cover a population of 3.2 million residents, cumulate nearly 400 health personnel, 330 beds, 153 583 consultations with 19 092 hospital admission per annum [20,21].

Participant: The study population consisted of workers who are in contact with patients and potentially exposed to body fluids. They were medical (physician and intern), paramedics (nurse, assistant nurse, midwife, laboratory and dental technician) and hygiene (cleaners, hygiene and sanitation engineer).

Sample size: The sample size was calculated using the single proportion formula (n = [Zα / 2]² *[P (1-P)]/ E²) at 95% confidence interval, where Zα / 2 = 1.96 and P = 36,7 % was obtained from a similar study in referral hospital in Yaounde [22]. The standard error was E = 5 %. Using above formula, we obtained 357 + 36 (10% dropouts) = 393 as our sample size. Since our exact population of respondents was less than 10 000, we used correction formula (nf = [ni / (1 + ni / N)] , where nf = minimum required sample size, ni = reduced sample size and N = total number of our respondents [23]. Using correction formula [393 / (1 + 393 / 400)], a minimum required sample size of 198 was obtained. An exhaustive sampling method was adopted in each clinical department and all consenting personnel included.

Data collection: The study instrument was an anonymous, structured and self – administered questionnaire consisting of 20 questions on demographics (age, gender, occupation, length of employment), compliance with standard precautions, AEB experience, appreciation of PPE availability and vaccination status.

Data processing and analysis: All filled questionnaires were entered and analysed using R statistics Version 4.2.3. The Chi-square (X²) test or Fisher's exact test for proportions were used to compare proportions. Multivariate logistic regressions were used to assess the strength of the association between variables. A p-value < 0.05 was considered statistically significant.

Results

Sociodemographic characteristics

Out of the 279 healthcare workers who were contacted, 217 returned the completed questionnaire, representing a response rate of 78 %.

Most of study participants were female (81%). Participants aged 25-34 (38.2%) were the most represented. Almost half of the participants were married (54.8%). Participants were mainly nurses (32.3%) and laboratory technicians (21.2%). Half of the health personnel had a professional experience of 3 to 7 years of professional experience (Table II).

Reported observance of universal precautions

A third of the participants (30 %) stated that they placed used syringes temporarily on benches and trolleys. Nearly a quarter of the participants (17 %) reported washing the scalpel blades for reuse and the highest proportion was found among medical personnel (9.2 %) (p-value < 0.0001) (Table I).

Table I. Selected Practices related to Universal Precautions among healthcare workers in Yaounde district hospitals, April 2022 (n=217)

Variable	Professional group n (%)			Total	p-value
Precaution activity	Medical n = 34	Paramedics n = 163	Hygiene n = 20
Needle recapping	28 (82.4)	107 (65.6)	11 (55)	146 (67.3)	0.077⁽¹⁾
Temporal staging of used needles on bench	12 (35.3)	53 (32.5)	0	65 (30.0)	0.008⁽¹⁾
Wash of scalpel for reuse	1 (3.0)	15 (9.2)	1 (5)	17 (8.5)	<0.0001⁽²⁾
Facilities used for sharps disposal
Safety box	33 (97.0)	159 (97.5)	19 (95)	211(97.3)
Plastic bottle	0	4 (2.5)	0	4 (1.8)	0.213⁽²⁾
Trash can	1 (3.0)	0	1 (5)	2 (0.9)

⁽¹⁾: Chi² test; ⁽²⁾: Fisher exact test.

Hand washing

More than half of the participants (53.5 %) reported not systematically washing their hand after each care. Such was attributed mainly to the perception that the patient care for was risk free (36 %), high workload (35 %) and the proximity of the point of care to the running water washing point (20 %) (Figure 1).

Accidental exposure to blood

Over the last 12 months, almost half of HCW (46.5 %; CI: 39.8 – 53.4 %) experienced a splash exposure. (Additional information on needle stick exposure are available through the link: https://doi.org/10.29011/2577-2228.100321)

Mvog Ada DH (60 %) had the highest prevalence of exposure to splashes. The difference was however non-significant (p-value = 0.057) (Table I).

Table I. Experience of Training on Infection Prevention and splashes among healthcare workers in Yaounde district hospitals, April 2022 (n = 217)

Health facility	Training on IC	p – value ⁽¹⁾	splash ≤ 12 months				p-value⁽¹⁾
	n (%)		n (%)	95 % CI Limit		Total
				Lower	Upper
Biyem Assi	20 (51)		12(33.3)	18.6	51.0	39	0.057
Cite Verte	21 (49)		12 (30.8)	17.0	47.6	43
Djoungolo	10 (26)	0.337	21 (48.8)	33.3	64.5	38
Efoulan	1 (3)		21 (55.3)	38.3	71.4	30
Mvog Ada	13 (42)		18 (60)	40.6	77.3	31
Nkolndongo	15 (42)		17 (54.8)	36.0	72.7	36
Total	80 (37)		101 (46.5)	39.8	53.4	217

⁽¹⁾: Chi² test. CI : Confidence Interval, IC : infection control.

Participants that reported splashes were midwifes/birth attendants (71.4 %). Surface workers were the least exposed (5.6 %). The difference was statistically significant (p-value = 0.002). Most of projections were observed in the surgical (64.7 %), obstetrics & gynaecology (64.5 %) and stomatology departments (61.1 %). The difference was significant (p-value <0.0001) (Table II).

Table II. Socio-professional determinants among healthcare workers in Yaounde district hospital, April 2022 (n = 217).

Characteristic	Count (n)	Frequency (%)	Total (100 %)	p-value
Gender				0.055⁽¹⁾
Female	87	49.4	176
Male	14	34.1	41
Age
18 - 24	5	29.4	17	0.122⁽²⁾
25 - 34	46	55.4	83
35 - 44	33	42.9	77
45 - 49	8	33.3	24
50 +	9	56.2	16
Professional grade
Assistant nurse	8	44.4	18
Student	6	50.0	12
Nurse	39	44.3	70
Sanitary engineer	0	0	2	0.002⁽²⁾
Doctor	18	48.6	37
Cleaner	1	5.6	18
Midwife/Birth attendant	10	71.4	14
Laboratory & dental technician	19	41.3	46
Unit
Surgery	22	64.7	34
Hygiene and sanitation	1	5	20
Laboratory	21	41.2	51
Obstetrics & gynaecology	20	64.5	31	<0.0001⁽²⁾
Medicine	14	37.2	37
Stomatology	11	61.1	18
Paediatrics	12	46.2	26

⁽¹⁾ : Chi² test; ^(2): Fisher exact test.

Personal protective equipment (PPE) and hygiene

HCW reported that PPE was always available for use (43 %). Goggles/visors/face shields, protective shoes and gowns were the least accessible PPE. Face masks and sterile gloves were inconsistently accessible (Figure 2 and Figure 3).

Djoungolo, Mvog Ada and Nkoldongo District Hospitals reported a considerable deficit in infection control inputs. The obstetrics and stomatology departments reported the least PPE supplies.

Occupational safety promotion signs and hospital hygiene

All the laboratory departments of the studied District Hospitals had posters on occupational safety, hand washing, guidelines for post-exposure management and prophylaxis. Biyem Assi DH had the most departments with safety and health instructions posters.

COVID-19 vaccination coverage

Less than half of participants had received a course of COVID-19 vaccine (44.8 %). Nkolndongo (74.2 %) and Cite Verte (66.7 %) had the highest of non-immunized (p-value <0.0001) (Figure 4).

The vaccine most preferred by HWC were Janssen (61 %) and Sinopharm (28 %). Astra Zeneca and Pfizer were the least administered (Figure 5).

Most of non-fully immunized healthcare workers were medical (61.8 %) and paramedical (52.1 %) professionals. (Table III).

Table III. COVID – 19 vaccination status and socio - professional status of healthcare workers in Yaounde district hospital, April 2022 (n = 217).

Professional status	Vaccination status n (%)			Total	p-value⁽¹⁾
	Unvaccinated	Partially	Fully
Medical	21 (61.8)	0	13 (38.2)	34 (100)
Paramedics	85 (52.1)	7 (4.3)	71 (43.6)	163 (100)	0.42
Hygiene	8 (40.0)	0	12 (60)	20 (100)

⁽¹⁾ : Fisher exact test.

Being a non-doctor or civil servant were among the protective factors (Table IV).

Table IV. Factors associated with unacceptance of COVID – 19 vaccinations among health staff in Yaounde district hospitals, April 2022 (n = 217).

Factor	aOR	95% CI
		Lower	Upper
Male/Female	0.90	0.45	1.81
Single/Married	1.16	0.66	2.03
Educational level: < 12 years/≥ 12 years	1.50	0.68	3.34
Other working group/Doctors	0.65	0.30	1.43
Civil servant/Contractual	0.73	0.40	1.31
Infection control training: No/Yes	0.97	0.55	1.71
aOR : adjusted Odds Ratio

The main reasons of non-vaccination against COVID-19 were doubt on the content of the vaccines (42 %) and fear of side effects (39.3 %) (Figure 6).

Discussion

More than two third of respondents recap needles during healthcare activities. This proportion is higher than that found in Congo and Morocco [22,23]. Nearly a third of respondents reported poor used needle disposal practices. Nearly 10 % of respondent claimed to wash the scalpel blades for reuse, a practice that increases the risk of percutaneous exposure to blood. Non-compliance with universal precautions was higher among paramedics.

The fact that half of staff did not systematically wash their hands after health services is worrisome. This practice is higher than those reported elsewhere in Africa [24,25]. Healthcare workers attributed this poor performance to contextual difference including high workload and unavailability of water or washing facilities far from the point of care. Mandana and Likwela in DRC reported urgency as the main reasons for non-compliance with this standard precaution [24]. Sub – optimal adherence to universal precautions may reflect insufficient supervision of health facilities and their staff by intermediate or central level public health authorities. In developed countries these measures are enforced in health facilities by an infection control committee. Internal and external monitoring and supervision ensure compliance with defined guidelines [26].

Midwives and nurses were the most affected by splashes confirming observations in other settings in France and Ivory – coast [10,25].

PPE were inconsistently available for use (43,6 %). This corroborates studies in Yemen (46.3 %) [28]. Higher availability were observed in Nigeria (67.2 %) [29].

Goggles/facial shields, protective shoes and gowns were the least accessible PPE while face masks and sterile gloves were inconsistently accessible. Departments most affected by lack of PPE included obstetrics & gynaecology and stomatology. Under resources constrains, it was expected that surgery department was given precedence as invasive procedures are carried out. [30]. Such misconceptions and erroneous perception should be cleared.

Nevertheless, some of these inputs (care/sterile gloves) were made available to the care provider by patients, which explain the fact that most of healthcare workers did not express the shortage. Non-systematic use of these devices by healthcare providers exposes them to the risk of HIV, hepatitis B and C viruses contaminations etc [26,29].

Almost half of healthcare personnel (52 %) were unvaccinated for COVID-19. Vaccination against COVID-19 has experienced great media coverage both nationally and internationally. District Hospitals have put in place incentive procedures such as the availability of daily vaccination centres. The cost free vaccine has also facilitated access at a time (April 2022) when coverage of fully vaccinated people was still very low (4.4 – 4.6 %) [31,32].

The Janssen vaccine was the most requested vaccine (61 %), consistent with the national trend [18]. Its unique dose regimen has largely contributed to its appropriation by healthcare workers.

The fact that medical (61.8 %) and paramedics (56.4 %) professionals were more reluctant to vaccination is staggering. This could be due to doubts about the content of the vaccine (42 %) and fear of vaccine-related side effects (39.3 %). Indeed, people with doubts about vaccine content had a 91 % chance of not accepting the COVID-19 vaccine [33].

Controversies that aroused by the COVID-19 vaccine in social media regarding efficacy and safety, would have fuelled the poor adherence and vaccine hesitancy among health staff who belong to this virtual community. In this regard, vaccine hesitancy was described as one of the barriers to vaccination [33].

Conclusion

Splash exposure was common among healthcare workers. PPE availability remained a challenge for most of health facilities despite the request of guidelines in COVID-19 pandemic context. More institutional strategies should be implemented to tackle occupational infection related to splashes. COVID-19 vaccination coverage among health personnel remains insufficient to ensure adequate protection. Communication on COVID-19 vaccine safety will be a useful tool against vaccine hesitancy.

Author's Contribution

Drafting of the study protocol, data collection, analysis and interpretation, drafting and editing of manuscript: F.Z.L.C.; Critical revision of protocol, critical revision of manuscript: E.E.L., J.H.N., and M-K.F-X.; Conception, design and supervision of research protocol and implementation, data analysis plan, revision, editing and final validation of the manuscript: I.T.

Funding Source

This research did not receive any specific grant from funding agencies in the public, commercial, or not-for-profit sectors.

Ethical Approval Statement

The protocol was reviewed and approved by the Regional Human Health Committee of the Centre (CRERSH - Ce) and the ethical clearance: CE N° 2245/CRERSHC/2021 issued.

Acknowledgements

Our gratitude goes to the health personnel who agreed to participate in this study and to the managers of the health facilities who gave their authorisation for the conduct of this study.

Declaration of interests

All authors declare no conflict of interest and have approved the final article.

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Figure 1. Constrains to systematic hand washing among healthcare workers in Yaounde district hospitals, April 2022 (n=116).

Figure 2. Reported availability of personal protective equipment among healthcare workers in Yaounde district hospitals, April 2022 (n = 217).

Figure 3. Reported availability of disinfectants among healthcare workers in Yaounde district hospitals, April 2022 (n = 217).

Figure 4. COVID – 19 vaccinations coverage among healthcare workers in Yaounde district hospitals, April 2022 (n = 217).

Figure 5. Source of COVID-19 vaccines received by healthcare workers in Yaounde district hospitals, April 2022 (n = 103).

Figure 6. Reason for non-compliance with COVID-19 vaccination among healthcare workers in Yaounde district hospital, April 2022 (n = 114).

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