Hepatitis B Virus Genotypes and Resistance Mutations in Brazil
Author Information
Author(s): Bottecchia Marcelle, Souto Francisco JD, Ó Kycia MR, Amendola Marcia, Brandão Carlos E, Niel Christian, Gomes Selma A
Primary Institution: Instituto Oswaldo Cruz, FIOCRUZ
Hypothesis
What is the distribution of HBV genotypes and the frequency of lamivudine resistance mutations among patients undergoing long-term lamivudine therapy?
Conclusion
A high proportion of patients on long-term lamivudine therapy displayed resistant mutations, with elevated viral loads, and rare genotypes C and G were identified.
Supporting Evidence
- 62% of HBV DNA positive samples showed lamivudine resistance mutations.
- Genotype A was the most prevalent among the patients.
- Three samples of genotype G were identified, which had not been previously detected in Brazil.
- Patients with lamivudine resistance mutations had high HBV loads, indicating potential for transmission.
Takeaway
This study looked at patients taking a medicine for hepatitis B and found that many had mutations making the medicine less effective, and some had rare types of the virus.
Methodology
The study analyzed HBV genotype distribution and lamivudine resistance mutations in 36 patients treated for 12 to 84 months.
Potential Biases
Potential bias due to the selection of patients from specific hospitals and risk groups.
Limitations
The study was limited to a small sample size and specific geographic region.
Participant Demographics
The study included 36 patients, 29 male and 7 female, with a mean age of 47 years.
Statistical Information
P-Value
p<0.05
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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