2017, Number 5
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Rev Invest Clin 2017; 69 (5)
Prevalence of Human Papillomavirus in Women from the State of Michoacan, Mexico, Showed High Frequency of Unusual Virus Genotypes
Jácome-Galarza I, Ito-Nakashimada MA, Figueroa-Aguilar G, García-Latorre E, Salazar IMA; López-Orduña E, Camacho AD, Valdez-Alarcón JJ, Hernández JM, León-Avila G
Language: English
References: 37
Page: 262-269
PDF size: 179.30 Kb.
ABSTRACT
Background: Human papillomaviruses (HPVs), the leading cause of cervical cancer, are distributed worldwide, with high prevalence
in developing countries.
Objective: The objective of the study is to know the prevalence and genotypes of HPV in women from
the state of Michoacán and the Women’s Hospital in Morelia, Michoacán. Materials and Methods: Cervical smear samples
(159,288) were subjected to HPV detection by hybrid capture 2. A subsample of 484 patients from the Women’s Hospital was
studied by Papanicolaou test and linear array HPV genotyping, and when positive, patients were also examined by colposcopy and
histopathology.
Results: The overall prevalence for HPV in Michoacán State was 7.74%; 7.11% in 2009, 6.46% in 2010, 9.58%
in 2011, and 8.43% in 2012. The highest prevalence was found in the age groups ‹ 25 and 25-34 years. The prevalence at the
Women’s Hospital was 8.51%. Cytological examination revealed normal cytology in 64.44% of samples, 26.66 % with low-grade
and 8.88 % with high-grade squamous intraepithelial lesion (HSIL). However, by colposcopy, normal tissue appearance was found
only in 26.66%; 51% were reclassified as low-grade squamous intraepithelial lesion, 17.77% as HSIL, and in 4.4% atrophy was
observed. The most prevalent genotype in single infections was HPV59, followed by HPV51 and HPV45. Double infections occurred
with the following genotypes: 52-53, 51-59, 61-67, 66-11, 16-62, 53-62, 59-CP6108, 45-66, and 45-51. Triple infections were
identified as: 6-31-39, 51-59-62, 51-62-81, 54-55-59, 16-58-71, and 16-59-62.
Conclusions: The prevalent genotype found
among women from Michoacán, HPV59, was different to the rest of the country. The high prevalence of HPV59 could be due
to cases imported to Michoacán by agricultural workers migrating to the USA or may be associated to ethnicity differences.
Implications of this finding for immunization programs should be explored.
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