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Revista de la Facultad de Medicina Humana

Print version ISSN 1814-5469On-line version ISSN 2308-0531

Rev. Fac. Med. Hum. vol.21 no.3 Lima July/Sept 2021

http://dx.doi.org/10.25176/rfmh.v21i3.3151 

Original article

Prior use of antibiotics and clinical characteristics of women who developed urinary tract infection due to Beta-lactamase bacteria in a peruvian hospital.

Ítalo Valero Román1 

Félix Llanos-Tejada1  , Thesis Faculty

1Facultad de Medicina Humana, Universidad Ricardo Palma. Lima,Peru.

ABSTRACT

Introduction:

The overuse of antibiotics has existed as a threat to public health for several years. The World Health Organization (WHO) warns that in the year 2050, the "post-antibiotic era" will begin, where approximately 10 million deaths per year will be attributed to resistant infections. The infection where this type of bacteria is most relevant is in urinary tract pathology.

Objective:

Determine the factors associated with the development of urinary tract infections by beta-lactamase-producing bacteria in older adults in the internal medicine service of the Dos de Mayo National Hospital.

Methods:

An analytical, cross-sectional, retrospective, case-control type study was carried out. Data were obtained through the review of medical records, with the completion of a data collection form related to sociodemographic aspects such as clinical data. With a total sample of 139 patients, 56 cases and 86 controls were obtained. We used Odds Ratio to measure the association, for which the statistical software SPSS was used.

Results:

A statistically significant association was observed between E. Coli ESBL infection with antecedents such as previous use of antibiotics and a history of recurrent urinary tract infection. The ORs and the confidence intervals of the variables that were shown to be significant were: recurrent urinary tract infection (95% CI, OR = 1,722), Anemia (95% CI OR = 1.96), Hypothyroidism (95% CI, OR = 1.13), Hypertension (95% CI, OR = 1,050), multi-pregnancy (95% CI, OR = 1,062) and History of previous antibiotic use (95% CI, OR = 22,106).

Conclusion:

The study identified the average age of presentation of urinary tract infection by E. Coli ESBL is between 65 to 75 years. Recurrent urinary tract infections and previous use of antibiotic treatment are significant risk factors for developing ESBL bacterial infections.

Keywords: Urinary Tract Infections; beta-lactamase; aged. (Source: MeSH - NLM)

INTRODUCTION

The overuse of antibiotics has been seen before, accompanied by a lack of knowledge of the complications that lead to the excessive use of antibiotics, granting our ever present enemies, the pathogens, the capacity to develop immunity to commonly used antibiotics, leaving us without existing therapeutic measures1.

The centers for disease control and prevention (CDC) warns over the diverse bacteria that develop resistance to multiple antibiotics due to its overuse, which leads to the decrease of therapeutic options and a greater difficulty in reaching patient recovery2. We emphasize that the indiscriminate overuse of antibiotics by humans is not the only cause, it is also reported that the use of livestock creates resistant bacteria. The most well-known resistant pathogens are methicillin-resistant staphylococcus aureus (MRSA), an extended spectrum beta-lactamase coliform productor, and the most feared are the carbapenem coliform productors3.

The World Health Organization (WHO) warns that in the year 2050, the "post-antibiotic era" will begin, where approximately 10 million deaths per year will be attributed to resistant infections4.

The infection with more relevance to this type of resistant bacteria is in the urinary tract pathology, which, during carbapenem coliform productors in most recent years, its incidence has increased with respect to antibiotic resistant bacteria, frequently presenting as Cystitis or Acute Pyelonephritis5. In several studies, a close relationship between prior infections treated with antibiotics and a greater risk of new infection by a pathogen resistant to standard treatments has been shown6. There are many published studies that ensure said phenomenon, however, many other non-assessed factors exist, such as sociodemographic characteristics.

Escherichia coli is still the common pathogen in urinary system infectious pathology, responsible for 75-90% of urinary tract infections7.

In a review by MEDLINE in 2014, they identified that over 30% of nosocomial infections are urinary tract infections8. A study performed in the capital of Peru reports that there is an elevated prevalence of self-medication in urban areas9.

METHODS

Study design

An analytical, cross-sectional, retrospective, case-control type study was carried out. Data were obtained through the review of medical records, with the completion of a data collection form related to sociodemographic aspects such as medical record.

Population and sample

The population was comprised of all adult patients over 65 years of age treated at the Hospital Nacional Dos de Mayo during the year 2018, with a total sample of 139 patients with urinary tract infections due to E.coli.

Cases: patients with E.coli ESBL positive urine culture.

Controls: patients with E.coli ESBL negative urine culture.

Exclusion criteria

Patients with an intercurrent disease that impedes the data collection. Additionally, incomplete medical records were excluded.

Variables

Through national and international literature review, the following variables were raised: sociodemographic factors (age, education level), pathological factors (history such as Diabetes mellitus, hypertension, anemia, prior urinary tract infections, presence of urinary tract stones) and history of medication use.

Procedure

A data collection sheet was used as an instrument. We created a data base in Excel software with the data recollected. This base was processed in the statistical program SPSS for its analysis.

Statistical analysis

We used the SPSS software for the statistical analysis and the graph development. We considered a level of significance of 95%. Frequency and descriptive statistical tables were used for its interpretation. Possible associations were analyzed through Odds Ratio (OR) measurements. Multiple regression logistic was used for the multivariate analysis.

RESULTS

Out of the 139 medical records reviewed pertaining to women admitted in the Hospital Nacional Dos de Mayo that were examined as part of the study, we obtained 56 cases and 83 controls. The cases (ESBL positive urine culture) represented 40,3% of the total sample.

With respect to general characteristics, the maximum age found was 99 years and the minimum was 65 years (which is the cutoff point given by the WHO to define an elderly adult). The average age (mean) was 73 years. The patients originated from the region of Lima in 87,1%.

The patients with complete grade school represent 31.7%, while 1.4% of patients had high school education.

Likewise, the comorbidities studied presented the following distribution: the presence of prior urinary tract infection episodes occurred in 44,6%. The presence of kidney stones was seen in 10,8% of patients. Hypothyroidism was found in 6,5% of patients. The number of patients categorized as multigestational (≥5 births) were 54% of patients. Diabetes mellitus was found in 46,8% of patients. Hypertension was seen in 43,9% of patients. SeeTable 1.

Table 1.  Main medical history in patients treated in the internal medicine department of the Hospital Dos de mayo for urinary tract infection. 

  Cases (ESBL+) Controls (ESBL-) Total
  n % n %
Anemia*            
Yes 29 24% 29 24% 58 47,54%
No 20 16,39% 44 36,07% 64 52,46%
Multigestational
Yes 46 33,09% 21 15,11% 67 48,20%
No 10 7,19% 62 44,60% 72 51,80%
Recurrent Urinary Tract Infection
Yes 29 20,86% 33 23,74% 62 44,60%
No 27 19,42% 50 39,57% 77 55,40%
Diabetes Mellitus
Yes 32 23,02% 33 23,74% 65 46,76%
No 24 17,27% 50 39,57% 74 53,24%
Prior use of Antibiotics
Yes 46 68,66 21 31,34 67 48,20%
No 10,00 13,89 62 86,11 72 51,80%
Hypertension
Yes 24 34,43% 37 60,66% 61 43,88%
No 32 41,03% 46 58,97% 78 56,12%

*In the anemia variable, 122 records were studied due to the existence of 17 lost data.

We observed a statistically significant association between infection due to E. Coli ESBL and the history, such as prior antibiotic use and recurrent urinary tract infection.

In a similar manner, the OR and confidence intervals of variables that presented significative differences between the group with E.coli ESBL and no ESBL are shown. These variables were: recurrent urinary tract infection (CI 95%, OR=1,722), Anemia (CI 95% OR= 1.96), Hypothyroidism (CI 95%, OR=1.13), hypertension (CI 95%, OR=1.050), multigestational (CI 95%, OR=1.062) and history of prior antibiotic use (CI 95%, OR=22.106). Likewise, we observed that other variables that did not pose a risk between the groups with E.coli ESBL and no ESBL were kidney stones, diabetes. (Table 2)

Table 2 Bivariate analysis of factors and the group of patients with E coli ESBL and non ESBL  

Associated factors Percentage of patients with the factor p-value OR CI 95%
Anemia
Yes 47,54% 0,105 1,974 0,982
No 52,6% 3,969
Multigestational
Yes 48,20% 0,944 1,027 0,495
No 51,80% 2,128
Recurrent Urinary Tract Infecgtion
Yes 44,60% 0,044 1,702 0,903
No 55,40% 1,878
Diabetes Mellitus
Yes; 46,76% 0,044 0,659 0,437
No 53,24% 0,994
Prior use of antibiotics
Yes; 48,20% 0,000 13,581 5,839
No 51,80% 31,588

DISCUSSION

The present study has extreme relevance in the practical clinical field as well as theoretical field, thanks to this we have a better vision of the determinant principles that may be associated with the development of infections resistant to antibiotics, whose frequency is emerging in hospitals as well as in the community.10

In our study we found that the average age was 71 years, but having only studied an elderly adult population, it is not prudent to associate older age as a risk factor. Also, we should take in consideration that life expectancy estimated in Peru is 73 years of age, which would help to understand why there were few patients over 80 years of age.

The multigestational variable in diverse studies has obtained high Odds Ratio values11. According to our results obtained, we evidenced a 38.1% frequency of patient with multigestational history. The interrelation of a urinary tract infection due to ESBL in multigestational women was present in 20 cases. We obtained an OR of 1.027. The association is sustained in the anatomical changes of the genitourinary as a consequence of labor trauma. However, there is a larger quantity of multigestational women who presented infection due to E.Coli ESBL.

We found an association between history of a recurrent urinary tract infection and the presence of E.Coli ESBL (OR=1.302, CI 0.903 - 1.878). In various studies, it is described that this association is a consequence of E.coli virulence factors, such as its fimbria which are able to attach to transitional epithelia12. As we mentioned, the trauma caused by labor results in a deformity in the feminine urogenital system. Also, lets associate it to the fact that menopause implies an estrogen hormone deficit which induces a vaginal pH alteration, which changing provokes a variation in the flora towards a pathogenic one7.

We also found anemia as a comorbidity in the presence of urinary trat infection due to E.Coli ESBL (OR=1.974, CI: 0.982 - 3.969). Anemia was found in a total of 20 patients that had infection by ESBL. We noted that 36% of the studied sample did not present any alteration in the blood count. This could be due that the fact they are elderly adults, their immune cellular and humoral response is not as effective. Among the alterations reported with greater measure we found Neutrophilia (40.6%) and Leukocytosis (48.9%). Diverse studies find a

Lastly, with respect to prior use of antibiotics, we found a statistically significant association in our sample, which is backed up by other studies. The use of antibiotics by self-medication is an elevated prevalence than in urban areas. Also, the inadequate use of antibiotics due to over prescription has an important relvelance9. This all implies that infection by ESBL bacteria does not necessarily occur in patients hospitalized as was the standard. Our study presented the limitation of not being able to discern if the patient was taking antibiotics due to over-prescribing or in a self-medicating form.

Despite the obtained results, the literature gives importance to other factors, which may be more useful when suspecting infection by ESBL bacteria. As in the study by Muñaqui et al, where he describes an associated risk when there are several catheters in the urinary tract13.

We recommend that the professionals in the health department register the age of sexual relation onset, as well as contraceptive use, no matter the unemployment time, since it also represents an associated risk according to the literature. With respect to the methodological level, we recommend validating these results in other populations of the different hospitals of the country, as well as by different age groups.

The limitations of this study are based on the existence of medical records with a deficient completion of which do not cover the complete number of factors to evaluate.

CONCLUSION

In this study, we identified the average age of presentation of urinary tract infection by E.Coli ESBL between 65 and 75 years. We concluded that the recurrent urinary tract infections and prior use of antibiotic treatment are significant risk factors to develop infection due to ESBL bacteria.

REFERENCES

1. Gould IM, Bal AM. New antibiotic agents in the pipeline and how hey can help overcome microbial resistance. Virulence. 2013 Feb 15;4(2):185-91. [ Links ]

2. CDC. Antibiotics resistance threats in the United States. U.S department of health and human services centers for disease control and prevention. , 2013. Centers Dis Control Preven- tion, Off Infect Dis Antibiot Resist Threat United States. 2013; [ Links ]

3. Brad Spellberg 1 DNG 2. The Future of Antibiotics and Resistance: A Tribute to a Career of Leadership by John Bartlett - PubMed [Internet]. Sep 15. 2014 [cited 2020 Jun 16]. p. Suppl 2(Suppl 2):S71-5. Available from: https://pubmed.ncbi.nlm.nih.gov/25151481/Links ]

4. World Health Organization. Antimicrobial resistance: global report on surveillance [Internet]. 2014 [cited 2020 Jun 16]. Available from: https://www.who.int/drugresistance/documents/surveillancereport/en/Links ]

5. Pineda-Posada M, Arias G, Suárez-Obando F, Bastidas A, Ávila-Cortés Y. Factores de riesgo para el desarrollo de infección de vías urinarias por microorganismos productores de betalactamasas de espectro extendido adquiridos en la comunidad, en dos hospitales de Bogotá D.C., Colombia. Infectio [Internet]. 2017 Apr 10 [cited 2018 Jun 17];21(3):141-7. Available from: http://www.revistainfectio.org/index.php/infectio/article/view/670Links ]

6. Alsan M, Kammili N, Lakshmi J, Xing A, Khan A, Rani M, et al. Poverty and community-acquired antimicrobial resistance with extended-spectrum ß-lactamase-producing organisms, Hyderabad, India. Emerg Infect Dis. 2018 Aug 1;24(8):1490-6. [ Links ]

7. Ruiz Paredes JI, Ruiz Paredes JI. Factores clínicos y epidemiológicos asociados a infecciones del tracto urinario por bacterias betalactamasa de espectro extendido, hospital san josé 2014-2015. Univ Ricardo Palma [Internet]. 2017 [cited 2018 Jun 14]; Available from: http://cybertesis.urp.edu.pe/handle/urp/900Links ]

8. Iacovelli V, Gaziev G, Topazio L, Bove P, Vespasiani G, Agrò EF. Nosocomial Urinary Tract Infections: A Review. Urol J [Internet]. 2014 Oct 11 [cited 2019 Sep 10];81(4):222-7. Available from: http://journals.sagepub.com/doi/10.5301/uro.5000092Links ]

9. Leonel Christian Martínez Cevallos. Percepción de la automedicación con antibióticos en los usuarios externos en un hospital publico en lima . 2013. [ Links ]

10. Pérez Heras I, Sanchez-Gomez JC, Beneyto-Martin P, Ruano-de-Pablo L, Losada-Pinedo B. Community-onset extended-spectrum ß-lactamase producing Escherichia coli in urinary tract infections in children from 2015 to 2016. Medicine (Baltimore) [Internet]. 2017;96(50):e8571. Available from: http://insights.ovid.com/crossref?an=00005792-201712150-00007Links ]

11. María Esther Ponce Matías. Características de la infección del tracto urinario recurrente en gestantes del Instituto Nacional Materno Perinatal 2007. 2008. [ Links ]

12. Candia Rodriguez L, Candia Rodriguez L. Factores de riesgo extrahospitalarios asociados a infección de las vías urinarias por E. Coli productoras de betalactamas en gestantes. Clínica Good Hope en marzo 2014 - 15 [Internet]. Universidad Ricardo Palma. Universidad Ricardo Palma; 2016 [cited 2018 Jun 17]. Available from: http://cybertesis.urp.edu.pe/handle/urp/478Links ]

13. Muñaqui Cárdenas G, Muñaqui Cárdenas G. Factores de riesgo asociado a infección del tracto urinario, blee positivo, en pacientes hospitalizados en el servicio de medicina del Hogar Clínica San Juan de Dios, durante el periodo enero - octubre 2015. Univ Ricardo Palma [Internet]. 2016 [cited 2018 Jun 14]; Available from: http://cybertesis.urp.edu.pe/handle/urp/466Links ]

Financing: Self-financed.

Received: June 30, 2020; Accepted: May 20, 2021

Correspondence: Ítalo Valero Román. Address: Tortulas 135-Cedros de Villa Chorrillos, Lima-Peru. Telephone: (+51)949 882 647 E-mail:ivr8195@gmail.com

Author contributions: The authors participated in the genesis of the idea, project design, data recollection and interpretation, results analysis and manuscript preparation of the current research work.

Conflict of interest: The authors declare they do not have any conflict of interests.

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