The non-structural 5B (NS5B) gene is the target region to identify hepatitis C virus (HCV) subtypes. However, it is not always possible to amplify this region because of inherently high sequence variability. Nucleotide sequences of the non-structural 5A (NS5A) and NS5B genes and its concordance were determined from patients infected with HCV genotype 1 (HCV-1). Among the 30 HCV-1 samples, 7 (23%) were identified as subtype 1a and 23 (77%) were identified as 1b by NS5A sequencing. Sequence analysis of the NS5B showed that 13 (43%) were identified as 1a and 17 (57%) were identified as 1b. Out of the 13 samples identified as 1a by NS5B, 6 (46%) were correctly identified by NS5A. Of the 17 samples identified as 1b by NS5B, 16 (94%) were correctly identified by NS5A. The presence of glutamic acid (E) or aspartic acid (D) at position 2225 in the NS5A differentiates 1a from 1b subtypes, respectively. This study showed that the NS5A sequencing can identify HCV-1a and 1b subtypes with predictive values of 86% and 70% of cases, respectively. The overall concordance with NS5B was 73%. NS5B sequence analysis remains to be the reference method to identify HCV-1 subtypes. NS5A sequencing may be used to complement NS5B sequencing in case the NS5B gene cannot be successfully amplified.

Human ; Male ; Female ; Aged ; Middle Aged ; Adult ; ; Aspartic Acid ; Genotype ; Glutamic Acid ; Hepacivirus ; Hepatitis C ; Nucleotides ; Sequence Analysis ; Viral Nonstructural Proteins

BACKGROUND: The low prevalence of human papillomavirus (HPV) DNA and mRNA in biopsy samples of Filipinos with head and neck squamous cell carcinoma (HNSCC) has been reported previously. Here, the HPV serologic profiles of HNSCC cases were analyzed and associated with lifestyle and sexual practices. METHODS: Serum samples were collected between May 2012 and September 2013 from HNSCC patients (n = 22) in the northwest region of the Philippines, and age- and sex-matched clinically healthy controls. Antibodies to capsid and early oncoproteins of HPV16, 18, 31, 33, 45, 52, 58, 6, and 11 were analyzed using multiplex serology. RESULTS: Most of the cases were males with tumors of the oral cavity or larynx. Two of the cases tested positive for at least one of the early oncoproteins (E6, E7, E1, and/or E2) of HPV16, and 11 did not display reactivity to any HPV early or late oncoproteins. Of the controls, four tested positive for at least one of the HPV16 early oncoproteins, and 10 were non-reactive to all HPV types. Titers to HPV16 E6 or E7 of the seropositive cases and controls were considerably lower than those typically observed in economically developed countries. CONCLUSIONS: The low HPV titers seen here are consistent with the results of molecular analyses for this population. Hence, the seropositivity of some of the HNSCC cases is likely an indication of prior exposure to the virus and not the presence of HPV-driven tumors.
Antibodies ; Biopsy ; Capsid ; Carcinoma, Squamous Cell ; Developed Countries ; DNA ; Epithelial Cells ; Head ; Humans ; Larynx ; Life Style ; Male ; Mouth ; Neck ; Oncogene Proteins ; Philippines ; Prevalence ; RNA, Messenger

INTRODUCTION: This study compared the effectiveness and safety of neem (Azadirachta indica) seed oil methanolic extract shampoo against permethrin shampoo in reducing head lice infestation among children. METHODS: A single-blind, non-inferiority, randomized clinical trial was conducted on children aged 6-14 years with pediculosis. Using block randomization, the participants were assigned to receive either 10% neem seed oil methanolic shampoo, 1% permethrin shampoo, or pure shampoo for three treatment applications at 10-day intervals. The presence of head lice after each application was determined by standard quadrant counting and compared with the baseline count within and among treatment groups. RESULTS: There was a statistically significant difference in lice count after treatment for both neem and permethrin, with mean reductions of 17.8 ± 23.97 (p = 0.043) and 22.5 ± 23.47 (p = 0.014), respectively. Repeated Measures ANOVA showed a summary p-value of 0.041 for neem, 0.013 for permethrin, and 0.193 for the shampoo alone with a linear trend indicating a significant decrease in the lice counts from the baseline to the third application of neem and permethrin shampoo, but not in the shampoo group. There was no significant difference in the mean decrease in lice count from baseline to the third application between the neem and permethrin shampoo groups. CONCLUSION Neem seed oil methanolic extract shampoo is non-inferior and comparable to permethrin in the reduction of head lice count. There were no reported dermatologic adverse effects such as burning sensations, redness, skin irritation, and allergic reactions.