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Trinh E, Batt LJ, Yue Q, Du R, Jones ST, Fielding LA. Bridging Flocculation of a Sterically Stabilized Cationic Latex as a Biosensor for the Detection of Microbial DNA after Amplification via PCR. Biomacromolecules 2024; 25:1629-1636. [PMID: 38361251 PMCID: PMC10934273 DOI: 10.1021/acs.biomac.3c01187] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2023] [Revised: 02/01/2024] [Accepted: 02/01/2024] [Indexed: 02/17/2024]
Abstract
There is a high demand for rapid, sensitive, and accurate detection methods for pathogens. This paper demonstrates a method of detecting the presence of amplified DNA from a range of pathogens associated with serious infections including Gram-negative bacteria, Gram-positive bacteria, and viruses. DNA is amplified using a polymerase chain reaction (PCR) and consequently detected using a sterically stabilized, cationic polymer latex. The DNA induces flocculation of this cationic latex, which consequently leads to rapid sedimentation and a visible change from a milky-white dispersion to one with a transparent supernatant, presenting a clear visible change, indicating the presence of amplified DNA. Specifically, a number of different pathogens were amplified using conventional or qPCR, including Staphylococcus aureus, Escherichia coli, and Herpes Simplex Virus (HSV-2). This method was demonstrated to detect the presence of bacteria in suspension concentrations greater than 380 CFU mL-1 and diagnose the presence of specific genomes through primer selection, as exemplified using methicillin resistant and methicillin susceptible Staphylococcus aureus. The versatility of this methodology was further demonstrated by showing that false positive results do not occur when a PCR of fungal DNA from C. albicans is conducted using bacterial universal primers.
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Affiliation(s)
- Elisabeth Trinh
- Department
of Materials, School of Natural Sciences, The University of Manchester, Oxford Road, Manchester, M13 9PL, United
Kingdom
| | - Lauren J. Batt
- Department
of Materials, School of Natural Sciences, The University of Manchester, Oxford Road, Manchester, M13 9PL, United
Kingdom
- Henry
Royce Institute, The University of Manchester, Oxford Road, Manchester, M13 9PL, United Kingdom
| | - Qi Yue
- Department
of Materials, School of Natural Sciences, The University of Manchester, Oxford Road, Manchester, M13 9PL, United
Kingdom
- Henry
Royce Institute, The University of Manchester, Oxford Road, Manchester, M13 9PL, United Kingdom
| | - Ruiling Du
- Department
of Materials, School of Natural Sciences, The University of Manchester, Oxford Road, Manchester, M13 9PL, United
Kingdom
- Henry
Royce Institute, The University of Manchester, Oxford Road, Manchester, M13 9PL, United Kingdom
| | - Samuel T. Jones
- Department
of Materials, School of Natural Sciences, The University of Manchester, Oxford Road, Manchester, M13 9PL, United
Kingdom
- Henry
Royce Institute, The University of Manchester, Oxford Road, Manchester, M13 9PL, United Kingdom
- School
of Chemistry, University of Birmingham, Birmingham, B15 2TT, United Kingdom
| | - Lee A. Fielding
- Department
of Materials, School of Natural Sciences, The University of Manchester, Oxford Road, Manchester, M13 9PL, United
Kingdom
- Henry
Royce Institute, The University of Manchester, Oxford Road, Manchester, M13 9PL, United Kingdom
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Bonfim FFDO, Villar LM, Croda J, Silva SRD, Gonçalves CCM, de Castro VDOL, de Rezende Romeira GR, Cesar GA, Dos Santos Weis-Torres SM, Horta MA, Simionatto S, Motta-Castro ARC, de Paula VS. Epidemiological Survey of Human Alphaherpesvirus 2 (HSV-2) Infection in Indigenous People of Dourados Municipality, Central Brazil. Trop Med Infect Dis 2023; 8:tropicalmed8040197. [PMID: 37104324 PMCID: PMC10143357 DOI: 10.3390/tropicalmed8040197] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2022] [Revised: 01/10/2023] [Accepted: 01/23/2023] [Indexed: 04/28/2023] Open
Abstract
Sexually transmitted Human alphaherpesvirus 2 (HSV-2) causes genital ulcers, especially among sexually active adolescents and adults. We estimated the exact prevalence of anti-HSV-2 antibodies and correlated it with the demographic and behavioral aspects of the Indigenous population of the Jaguapirú and Bororó villages (Dourados, Mato Grosso do Sul (MS), Brazil). In total, 1360 individuals (>18 years old) were administered serologic tests. The prevalence of anti-HSV-2 IgM was 12.9%, that of anti-HSV-2 IgG was 57.2%, and 8.5% cases tested positive for both HSV-2 IgM and IgG. The prevalence of anti-HSV-2 antibodies was higher in females (59.5%) compared to males (49%), with an OR of 0.64 (0.49-0.83). Anti-HSV-2 antibodies were found in 14.2%, 12.3%, 15.4%, and 14.5% of participants with urinary problems, genital wounds, genital warts, and urethral discharge, respectively. In summary, the seroprevalence of HSV-2 in the Indigenous population was five times higher than that reported in the general adult Brazilian population. Educational level, income level, smoking, condom use, incarceration, illicit drug abuse, the sharing of used needles and syringes without adequate disinfection, homosexual relationships, prostitution, the sexual practices among drug users, and avoidance of contraceptive methods could contribute to the facilitation of HSV-2 transmission in the Indigenous population. Our results may help develop culturally appropriate intervention programs that eliminate health-access barriers and improve the implementation of public health policies aimed at promoting information regarding and preventing, treating, and controlling HSV-2 infection in Brazilian Indigenous populations.
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Affiliation(s)
| | - Livia Melo Villar
- Viral Hepatitis Laboratory, Oswaldo Cruz Foundation, Rio de Janeiro 21040360, Brazil
| | - Julio Croda
- Brazilian Society of Tropical Medicine, Campo Grande 79070900, Brazil
| | | | - Crhistinne Cavalheiro Maymone Gonçalves
- Center for Biological and Health Sciences, Blood Center Sector, Federal University of Mato Grosso do Sul, Campo Grande 79070900, Brazil
- State Department of Health of Mato Grosso do Sul, Campo Grande 79031350, Brazil
| | | | | | - Gabriela Alves Cesar
- Center for Biological and Health Sciences, Blood Center Sector, Federal University of Mato Grosso do Sul, Campo Grande 79070900, Brazil
| | | | - Marco Aurélio Horta
- Biosafety Level 3 Platform (NB3), Oswaldo Cruz Foundation, Rio de Janeiro 21040360, Brazil
| | - Simone Simionatto
- College of Biological and Environmental Sciences, Federal University of Grande Dourados, Dourados 79070900, Brazil
| | - Ana Rita Coimbra Motta-Castro
- Center for Biological and Health Sciences, Blood Center Sector, Federal University of Mato Grosso do Sul, Campo Grande 79070900, Brazil
- Center for Health and Biological Sciences, Oswaldo Cruz Foundation, Rio de Janeiro 79070900, Brazil
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Healthcare seeking and sexual behavior among patients with symptomatic newly acquired genital herpes. Sex Transm Dis 2009; 35:1015-21. [PMID: 18685544 DOI: 10.1097/olq.0b013e318182a596] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
BACKGROUND Symptoms among patients with first episode herpes simplex virus (HSV) likely influence health seeking and sexual behavior. An improved understanding of this relationship provides insight into the experience of having genital herpes and has implications for counseling. OBJECTIVE To describe the healthcare seeking and sexual behavior in patients with symptomatic laboratory confirmed first episode HSV infection. METHODS Two hundred thirty-six patients (94 men and 142 women) with newly acquired genital herpes were asked to complete a demographic and sexual history questionnaire. To confirm initial HSV diagnosis, swabs of lesions were collected for viral culture and HSV DNA polymerase chain reaction and blood was drawn for confirmation of HSV serostatus using the Western blot. RESULTS Women reported pain and men reported lesions as the most frequent and bothersome symptom or sign causing each to seek healthcare. Forty-three percent of all participants missed some work or school because of their symptoms; women missed more school or work, sought care sooner, and saw more providers than men. Before diagnosis, most respondents (67%) suspected genital herpes was the etiology of the symptoms. Twenty-seven percent reported having sex after noticing their symptoms, though those who missed more school or work were less likely to engage in sexual intercourse. CONCLUSIONS Men and women have different experiences with first episode HSV, but morbidity is substantial, especially among women. Both men and women may continue to engage in sexual activity after onset of genital herpes, emphasizing the need for providers to counsel their patients to avoid exposing partners to the infection.
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Ukrainets IV, Bereznyakova NL, Turaibei IA. 4-Hydroxy-2-quinolones 139. Synthesis, structure, and antiviral activity of N-R-amides of 2-hydroxy-4-oxo-4H-pyrido[1,2- a]pyrimidine-3-carboxylic acids. Chem Heterocycl Compd (N Y) 2008; 44:50. [PMID: 32214416 PMCID: PMC7088292 DOI: 10.1007/s10593-008-0012-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2007] [Indexed: 11/10/2022]
Abstract
Dialkylaminoalkylamides of 2-hydroxy-4-oxo-4H-pyrido[1,2-a]pyrimidine-3-carboxylic acids have been obtained as potential antiviral agents. The special features of the spatial structure of one example of the synthesized compounds have been studied. Results are given of the investigation of cytotoxicity and antiviral activity in relation to type 1 herpes virus and coronavirus.
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Affiliation(s)
- I V Ukrainets
- 1National University of Pharmacy, Kharkiv, 61002 Ukraine
| | | | - I A Turaibei
- 2Kharkiv Medical Academy of Postgraduate Education, Kharkiv, 61176 Ukraine
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