Nosocomial Infection and Antibiotic-Resistant | IDR - Dove Medical Press

Introduction

Nosocomial infections (NIs) are associated with different toxins or infectious agents that cause infection among patients admitted to the hospital. These infections are likely to spread through hospital boundaries during the patient's hospital stay.1 Eighty percent of the NIs are in the form of nosocomial pneumonia infection (NPNEU), nosocomial bloodstream infection (NBSIs), nosocomial urinary tract infections (UTIs) and nosocomial surgical site infections (SSIs). The rate of incidence of NIs varies from one region to another, along with time variations. According to the information provided by the World Health Organization (WHO), out of every group of 100 patients, seven from the developed countries and ten from the developing regions are suspected of nosocomial infection.2

Several causes, including patient-, infection- or procedure-related, in addition to pathogen involvement, are associated with the spread of these infections. For instance, Al-Shami and Al-Haimi3 provided essential details regarding the causative factors that prevail in SSIs, which are generally associated with the organ/space or incision. SSIs connected to the incision are divided into deep incision SSI and superficial incision SSI, respectively. Organ or spaced-based SSIs are connected to the anatomical parts of the body other than body wall layers opened during the operation. The common signs include the infectious discharge surrounding the wound area, referring to the cellulite draining through the wound. This type of infection is acquired during the operational process either endogenously or exogenously from the operation site. Similarly, the potential risk factors for spread of NPNEU are related to patient care, infection control and procedure. Patient-related factors include chronic or acute disease severity related to patient, prolonged hospitalization, smoking, coma and comorbidities presence. The infection prevention risk factors include inadequate disinfection of respiratory care devices, bedding articles, aerosol spread or improper hand hygiene practices and procedural factors include prolonged used of immunosuppressants, corticosteroids and resistance to antibiotics.4–6 Use of central vascular catheters (CVCs) as invasive devices in hemato-oncological patients increases risk of NBSIs, specifically central line associated blood stream infection (CLABSI).7 The common opportunistic pathogens such as Escherichia coli (E. coli), Klebsiella pneumoniae (K. pneumoniae), Candida albicans (C. albicans), Enterococcus faecium (E. faecium), Staphylococcus aureus (S. aureus), methicillin-resistant Staphylococcus aureus (MRSA), Clostridium difficile (C. difficile) and Acinetobacter baumannii species are among some of the primarily contributing pathogens in different types of NIs during stay in hospital.8,9

The exposure to microbes, parasites, fungi and bacteria plays a critical role in leading to NIs during hospitalization and the development of increasing consequences for patients, their families, and the community at broader levels. The most common consequences associated with NIs include increased hospital stay length, high morbidity rate, and mortality.2 These consequences significantly affect the cost of patients' healthcare services and further reduce the reliability of available resources, specifically in developing countries.10 Shinde and Mohite11 identified nurses as the most common individuals exposed to NI diseases since they are involved in dressing, medication, sterilization, and disinfection process of patients.

The treatment of NIs is a long-term process and thus includes the intake of antibiotics among patients. However, the injudicious antibiotic usage developed challenges due to escalated rate of antibiotic resistance. This antibiotic resistance involve microbes and pathogens exposure to drugs due to inappropriate consumption of antibiotics, their over-usage, poor adherence and inadequate doses poses some major threats to patients' health.12 The extent of the problem resulted in the decreased production of new antimicrobial drugs development. According to WHO, a warning was raised about the upcoming post-antibiotic era,13 as antibiotic resistance contributes to developing an increased societal, personal, and economic burden of illness by significantly increasing patients' healthcare costs and death rate. This further poses a dire threat to antimicrobial therapy. The problem has raised essential health concerns in both developed and developing countries.

Benassi14 proved that antibiotic resistance is generally developed due to pharmacists' illegitimate supply of antibiotics. Pharmacies operated without a knowledgeable pharmacist ultimately increase the risks of healthcare burden over the general population. The fact is generally associated with selling and purchasing antibiotics through misinformation.15 This results in the acquisition of antibiotic intake without a proper diagnosis, leading to antibiotic resistance risks.

The continuous increase in the development of multidrug-resistant (MDR) bacteria has now been developed as a global concern, contributing towards increased morbidity and mortality rates, increased healthcare bills, patient visits to hospitals and outpatient clinics.16 According to WHO,17 the development of MDR has limited the treatment modalities of infectious diseases. Zakai18 outlined that a remarkable increase in antibiotic resistance has been witnessed.

Therefore, the present study aims to provide a detailed review of the literature regarding the prevalence of nosocomial infections and antibiotic resistance in the Middle East. A detailed discussion regarding causes, types, effects, and treatment methods provided for NIs and threat to antibiotic resistance is also provided. Important information is extracted from relevant studies related explicitly to the Middle Eastern countries.

Causes of Nosocomial Infections

Nosocomial infections are generally caused by bacteria, fungi, viruses, and parasites. The most commonly growing strains include: coagulase-negative staphylococci,19 methicillin-resistant Staphylococcus aureus (MRSA),20 enterococci,21 etc., and serve as the antimicrobial-resistant strains. The most common reason behind the prevalence of infections is the antimicrobial-resistant strains. Shalini et al22 outlined that the presence and spread of the infectious material is yet another important cause of these infections, as it consists of endogenous organisms, exogenous, ie, cross or environmental infections. Reyes, Bardossy, and Zervos19 highlighted vancomycin-resistant enterococcus (VRE) as the most dangerous infection in the hospital environment. Another multicentre surveillance study23 conducted in 14 Middle Eastern countries reported higher incidence of BSIs specifically related to PVC, in comparison to USA and Australia. The study reported 470 PVCs (2.32/1000 PVCs per day) and mortality rate of 29.36%. Most prevalent microorganisms were gram-positive bacteria (55.2%), including 31% coagulase-negative S. cocci, 14% S. aureus, 39% gram-negative bacteria as causative agents of infection, with predominance of K. pneumoniae (8%), 7% E. coli, 5% P. aeruginosa and 3% Enterobacter spp.

Other common risk factors that commonly contribute to the development of such infections are individual age, chronic diseases such as renal failure, malignant tumor, cancer24 along with AIDS, low immune status, leukaemia, etc. In addition, therapeutic procedures, endoscopic examinations, ventilation, intubation, surgical procedures, and catheterizations are other causes of nosocomial infections. However, airborne routes and vehicle-borne routes are identified as the critical sites for these infections. Other areas include lower respiratory tract infections, bloodstream infections, surgical site infections, soft tissue infections, gastroenteritis, urinary tract infections, etc.22 Heydarpour et al22 provided a basic stance in this regard. The study indicated that, among 6000 patients who underwent open-heart surgery in Iran, approximately 135 patients were affected by nosocomial infections. SSI (52.6%) was most frequently reported followed by PNEU (37%), UTI (9.6%) and BSI (0.8%). Major pathogens involved in these reported NIs included E. coli, Klebsiella spp. and S. aureus, respectively. E. coli was further found mainly resistant to imipenem (23.3%), Klebsiella spp. to gentamicin (38.5) and S. aureus to co-trimoxazole (54.2%).

Similarly, specific surgical procedures have also been identified to cause and spread these infections, especially SSIs, including ventilator-related pneumonia, bloodstream infections, catheter-related UTIs, etc. In addition, the most common risk areas driving these infections include operation theatres, food handlers, burns units, drinking water, dialysis unit, transfusion service units, etc. However, hospital sites such as orthopaedic wards, general wards, and specifically acute surgical wards are identified as places with an increased chance of infection.12,25 A study reported 5.4% prevalence of SSIs in Jordan. Another study reported SSI association with raised morbidity and mortality in CABG-bypass graft surgery of about 16.8%. The major factors include improper infection control practices, antibiotics misuse, type of surgical procedure and overcrowding in wards.40 Pathological knowledge regarding the spread of nosocomial infections may contribute to controlling the spread of these infections.

Types of Nosocomial Infections

According to the National Healthcare Safety Network with the Centre for Disease Control (CDC), nosocomial infections are generally classified into 13 types depending upon their site of infection, which are specified based on their clinical and biological criteria. Surgical site infections, respiratory tract infections, bloodstream infections, nosocomial fungal infections, urinary tract infections, central nervous system infections, nosocomial pneumonia including the bacterial and viral pneumonia, Mycobacterium tuberculosis, legionnaires' pulmonary aspergillosis, etc. are some types of nosocomial infections that have been encountered.26 Other common types of infection are provided below.

Central Line-Associated Blood Stream Infections (CLABSIs)

These types of infection are generally regarded as the deadliest nosocomial infections, with an increased death rate. During the treatment interventions, catheters are placed in the central lines to supply medicines and other fluids in the patient's body. However, their prolonged usage may cause acute bloodstream infections, leading to compromised health and increased cost of healthcare.27 Khan, Baig, and Mehboob28 outlined that although there is a decrease in the CLABSIs infections in most US hospitals, its prevalence is still observed explicitly in acute surgical and ICU wards.

Catheter-Associated Urinary Tract Infections (CAUTI)

CAUTI is often characterized as one of the most commonly identified types of nosocomial infection, with a high prevalence globally.19 Urinary tract infections (UTIs) account for almost 12% of the prevalence of infections reported in different hospitals. The endogenous native microflora of patients cause the development of these infections. Catheters placed in the human body serve as an important site for bacteria to enter the human body. However, in some instances, the imperfect drainage from the catheter leads towards the resisted volume of urine, providing a complete site for the survival and development of bacteria. In extreme cases, CAUTI develops complications such as pyelonephritis, meningitis, cystitis and prostatitis, orchitis, and epididymitis, generally found among male patients.28

Surgical Site Infections (SSIs)

Surgical site infections are generally found among 2% to 5% of patients who underwent surgery. It is recognized as the second most common type of nosocomial infection29 that supports the development of Staphylococcus aureus,30 which in extreme cases leads to long-term hospitalization and mortality risks. The endogenous microflora of patients is the pathogen that causes the development of SSIs. The incidences of SSI are identified to be 20%, depending upon the surveillance criteria and procedure.

Ventilator-Assisted Pneumonia (VAP)

VAP is another type of infection that contributes to nosocomial infections among critically ill patients.31 Around 9–27% of patients commonly assisted to ventilator develop VAP, which occurs after the tracheal intubation in less than 48 hrs. Approximately 86% of nosocomial pneumonia is associated with ventilation. High fever, bronchial sounds, and leukopenia are some common symptoms of VAP.28

Prevalence of Nosocomial Infections and Antibiotic-Resistance in the Middle East

Like every other country, Middle Eastern countries are also highly suspected of the prevalence of nosocomial infections. Nasiri et al32 outlined the value of the antimicrobial-resistance of different pathogens in Tehran, Iran. In this study, 3.3% of patients reported NIs. Highest reported rate of hospital-acquired infections (HAIs) was found to be acquired from bone marrow transplant units. The most common infections identified were bloodstream infections (BSIs), followed by urinary tract infections, surgical sites infections, and lower respiratory tract infections (LRIs). Most frequently reported microbes included Acinetobacter species (14.2%) (Table 1). Another multicentre surveillance study conducted by Rosenthal et al23 in fourteen Middle Eastern countries reported prevalence of PVC-related BSIs. The results demonstrated overall 58% prevalence of gram-negative bacteria with E. coli (16%) and gram-positive of 12%, respectively. P. aeruginosa was most resistant to fluoroquinolones (26.93%), Acinetobacter baumannii was most resistant to imipenem (IPM) and meropenem (MEM) (25.93%) and Klebsiella species was most resistant to ceftriaxone or ceftazidime (75%).

Table 1 Summary of Studies Reported in the Middle East Reporting Types of Nosocomial Infections and Resistance to Antibiotic Patterns

A retrospective study by Al Samawi et al33 at the Hamad General Hospital of Qatar, reported prevalence and antimicrobial susceptibility of A. baumannii infection. From the overall patients, 239 (64.3%) isolates were classified as infectious, with highest prevalence among males (76.2%). HAIs were reported more frequently (96.7%), with maximum resistance against Cefotaxime 58.3% and minimum resistance against colistin (1.4%). Considering most frequent infection type, study in Yemen reported surgical site infections (SSIs) as highest prevalence site, which was suspected to be 8% in 2002,34 with a high-level raise of 34% in 2013.35 According to Piso et al,36 the Syria, Afghanistan, or Eritrea refugee populations are also highly affected by antibiotic resistance leading to nosocomial infections. The most frequent colonization was of extended-spectrum beta-lactamases (ESBL) (23.7%) followed by MRSA (15.7%). The susceptibility for clindamycin and rifampin was 100% (Table 1).

The prevalence rate of nosocomial infections in different hospitals of Jordan was identified by Abu-Harrah, Faris and Gomaa37 among three leading hospitals in Jordan. Findings indicated three significant pathogens that contribute to the development of nosocomial infections. These pathogens are Acinetobacter baumannii, Pseudomonas aeruginosa, and Klebsiella pneumoniae. The ICU was also identified as the major department behind the spread of VAP, CLABSI, CAUTI, community-acquired infections, ward-acquired infections, and SSIs. Another study, by Esfahani et al,38 reported highest prevalence of Pseudomonas aeruginosa (13.9%), Klebsiella (11%), and Escherichia coli (6.4%) in Iranian population and most resistance was observed against ampicillin, oxacillin, co‑trimoxazole, and nitrofurantoin.

Iyer et al39 provided a comparative analysis of the incidences of MRSA among healthcare workers with nosocomial infections in different units of Jeddah hospitals. The study's findings indicated a prevalence rate of MRCA up to 76%, specifically among healthcare workers. Al-Awaysheh's40 study identified the prevalence of SSIs in the tertiary hospital of Jordan. The prevalence rate of surgical site infections was 5.4%. In addition, both gram-negative and gram-positive bacteria were found among the recruited individuals with the given values of 57% and 43%, respectively. The most common etiologies were Escherichia coli (24.5%) and Staphylococcus aureus (35%). In addition, antibiotic resistance for gram-positive bacteria was highest for ampicillin, whereas minimum resistance was observed for teicoplanin, linezolid, and vancomycin. Gram-negative isolates resistance was common for ampicillin, amoxicillin-clavulanate, and ciprofloxacin, and minimum resistance was indicated for piperacillin-tazobactam, gentamicin, and meropenem.

Elgonda41 reported another important fungal pathogen, Candida auris, leading to BSIs, UTIs, SSIs and skin abscesses, as its biofilm due to invasion of innate immunity (neutrophils) raises antibiotic resistance among ICU patients. The annual fatality rate in India in 2009 due to C. auris nosocomial outbreak was 20–60%. The drug resistance mechanism involved increased efflux pump activity of CDRI and MDRI transporters in C. auris. Another cohort study in India among 227 ICU patients reported that antifungal prior exposure in 74 candidiasis reported cases was significantly associated with C. auris (P < 0.001).42 Another study was conducted by Al Rahmani et al43 to assess the prevalence rate of resistant pathogens and their susceptibility in Oman. A total of 15,733 retrospective samples were collected, among which gram-negative bacteria was common among 67.76% samples, whereas gram-positive bacteria was familiar with a ratio of 29%. Overall, 2.63% of samples were affected by Candida species. In addition, the most common gram-negative isolated bacteria were Escherichia coli, Pseudomonas aeruginosa, and Klebsiella pneumoniae, with the prevalence rates of 32.39%, 22.16%, and 19.97%, respectively. However, no resistance was identified for tigecycline and colistin. Isolated resistance was provided for K. pneumoniae and E. coli and was initiated through BSI. Gram-positive bacteria that were universally susceptible to linezolid and daptomycin included MSSA with the prevalence rate of 27.23%, MRSA (16.10%), and Streptococcus agalactiae (25.36%). From the findings, it was thus concluded that antibiotic prescriptions must be optimized through stewardship interventions.

In patients with secondary infection in Iran, a study44 evaluated antimicrobial resistance and presence of microbes in the CSF, UTI and tracheal aspiration indicated that E. coli (59.6%) was most frequent in UTI specimens, K. pneumoniae (3, 18.7%) from CSF and K. pneumoniae (164, 27.8%) from tracheal aspiration.

Effects of and Preventive Measures for Nosocomial Infections and Antibiotic Resistance

The prevalence of healthcare infections associated with different hospitals is globally common, leading to adverse health effects. These infections are recognized to negatively impact the quality of healthcare, leading to the development of different problems. According to Iyer et al,39 nosocomial infections account for 5–10% of healthcare cases admitted in emergency care. Among various risk factors, Staphylococcus aureus is the most common cause of the development of these healthcare infections. These infections serve to develop an adverse effect on health, leading to severe illness or even death. The rate of these infections is increasing day by day, specifically in the ICU. Staphylococcus aureus further affects the skin and nose of healthy individuals with a prevalence rate of 25–30%. However, in most complicated cases, these infections lead to the development of different severe diseases. Such bacteria further cause resistance to other antimicrobial drugs.

Halwani et al45 identified that isolated drug resistance bacteria generally cause hazardous issues for individual health since these antimicrobial drugs are highly effective in counter-fighting the effects caused by the diseases leading to the decrease in death rate and illness. The study further outlined that antibacterial-resistant isolates serve as the fundamental cause of disease outbreak and thus give rise to health-related infections, including pneumonia, urinary tract infection, bacteremia, meningitis, and wound infection, and are further associated with the therapeutic infections among different patients. In addition, resistance against the significant antimicrobial drugs began between 1 year to > 10 years ago. New compounds such as fluoroquinolones and cephalosporins are further suspected of the increased multidrug-resistant bacteria. In addition, nosocomial bacteria like E. coli further contribute to developing meningitis, urinary tract infections, extra-intestinal infections, and peritonitis intestinal infections, following resistance to the antimicrobial agents.

Al-Gethamy et al,46 in their study, identified that in healthcare centers of Turkey, 16.6% of the nosocomial infections were developed due to A. baumannii. However, the prevalence rate of these infections was standard among the ICU patients, leading to the development of respiratory tract infections, which were common among 52.5% of patients. Other bacteria such as Acinetobacter contribute to the development of severe pneumonia and the development of urinary tract infections, bloodstream infections, and infections in other body parts.

Management of nosocomial infections such as A. baumannii is often difficult due to the increased resistance to antibiotics and the new mechanism of resistance to the treatment. The spread and the development of these infections can be controlled by the effective management of risk factors such as low patient immunity, size, hospital type, prolonged medical measures along with the careful practice of invasive techniques that serve as the most basic routes of infection along with the transmission of antibiotic-resistant bacteria specifically in the hospital boundaries. To control the spread of these infections, it is essential to manage the quality control of the infection controlling practices (ICPs) to develop immunity against these diseases.2

Moreover, hospital management needs to develop a surveillance program against the spread of and to control hospital-acquired infections to reduce the spread of diseases. In addition, the national healthcare authority of the Middle Eastern countries must formulate an agency that may oversee the adoption of healthcare policies and preventive measures in different hospitals of these countries. The development of the national expert committee is further essential to provide high-level support to the hospitals in reducing and preventing the spread of nosocomial infections among patients. Infection control and total quality management program are further effective following the supervision of the antimicrobial committee of drug prescriptions to ensure the effective use of carefully prescribed drugs. This can only be implemented by developing institutional leadership, which ensures the provision of funds for ICPs, which includes the provision of supplies, training, dissemination of information, and other related facilities that provide the application of practices that ensure the prevention of nosocomial infections. Finally, health workers need to make hospitals a safe place for patients and the overall community.

Conclusion

Nosocomial infections following antibiotic resistance are an emerging problem in Middle Eastern countries, leading to significant morbidity and mortality. Most frequently reported NIs in Middle East in our review are BSIs (50%) and SSIs (50%) followed by UTIs. Escherichia coli and Klebsiella species among gram-negative bacteria, Staphylococcus aureus among gram-positive bacteria and fungal pathogens such as Candida species are most reported pathogens involved in nosocomial infections, and resistance to penicillin, cephalosporin, carbapenem and fluoroquinolone antibiotics were significantly reported. However, most studies showed minimum resistance of pathogens against the drug colistin. Hence, further studies are required in Middle East to further examine and improve sensitivity of colistin in NIs.

Considering the information presented in this study, government officials need to ensure further studies reporting nationwide surveillance data of antimicrobial resistance and, accordingly, develop adequate healthcare mechanisms followed by regular supervision. In addition, healthcare education programs must add training courses of antibiotic stewardship program to provide the required knowledge of nosocomial infections and their preventive measures.

The present study is significant as no such study focusing on the prevalence of nosocomial infections and antibiotic resistance in Middle Eastern countries has been conducted before. Information provided in this study is valuable and thus serves as an essential contribution to the existing studies of healthcare. Future researchers are suggested to identify measures undertaken by the healthcare sectors to prevent the prevalence of nosocomial infections and antibiotic resistance in Middle Eastern countries.

Data Sharing Statement

The data will be available for review from the corresponding author on request.

Acknowledgment

The author highly acknowledges the contribution of all the associated personnel who contributed to the completion of this study.

Funding

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

Disclosure

The author declares no conflicts of interest in this work.

References

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