Feasibility of Training Community Health Workers to Use Smartphone-Attached Microscopy for Point-of-Care Visualization of Soil-Transmitted Helminths in the Peruvian Amazon

Eve Ameen Renaissance School of Medicine, Stony Brook University, Stony Brook, New York;

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Simon Nin Zhu Renaissance School of Medicine, Stony Brook University, Stony Brook, New York;

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Cesar Morales Guzman Universidad Nacional de la Amazonía Peruana, Iquitos, Peru;

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Erin Taub Global Health Institute, Stony Brook University Hospital, Stony Brook, New York;

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Crystyan Siles U.S. Naval Medical Research Unit No. 6, Iquitos, Peru;

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Graciela Meza Sanchez Universidad Nacional de la Amazonía Peruana, Iquitos, Peru;

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Stalin Vilcarromero Universidad Peruana Cayetano Heredia, Lima, Peru;

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Cesar Ramal Universidad Nacional de la Amazonía Peruana, Iquitos, Peru;

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Nolberto Tangoa Centro de Salud San Juan, Ministerio de Salud Peruana, Iquitos, Peru;

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Luis A. Marcos Global Health Institute, Stony Brook University Hospital, Stony Brook, New York;
Infectious Diseases Division, Department of Medicine, Stony Brook University, Stony Brook, New York

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ABSTRACT.

The prevalence of soil-transmitted helminths (STH) is high in communities within the Peruvian Amazon despite repeated mass-drug administration, demanding alternative strategies of control. Smartphone-attached microscopy (SAM) permits visualization of STH from a small portable microscope through a smartphone screen, potentially providing an inexpensive and rapid method of STH visualization in communities where diagnostic laboratories with microscopes are inaccessible. In this study, a total of 45 community health workers who work within the health systems of Loreto, Peru, attended a 1-day training session with lectures and practicums on STH and SAM. Participants received a pre- and post-intervention questionnaire. Post-intervention, participants were significantly more confident using SAM and identifying parasite images, symptoms, transmission, and treatment (P ≤ 0.0045). Post-intervention, participants correctly labeled a median of five of seven SAM apparatus components and five of eight steps of Kato–Katz technique, were less likely to choose taking medicine to prevent parasite infection (P = 0.0075), and were more likely to select Kato–Katz technique as a type of diagnostic test (P < 0.0001). Most participants felt ready to use SAM in their communities and stated that it could help rural communities far from health centers or laboratories (24%); provide faster identification, results, diagnosis (19%); permit at-home or on-the-spot visualization (14%); and save money (14%). Results show that community health workers show a high level of willingness and competency to learn about both STH and SAM and may be a yet-unexplored practical method of augmenting STH visualization, bringing healthcare to communities in Loreto with poor access to diagnostic laboratories and clinics.

Author Notes

Address correspondence to Eve Ameen, 250 West 57th Street, 15th Floor, New York, NY 10019. E-mail: aeve.ameen@mountsinai.org

Financial support: Benjamin H. Kean Travel Fellowship in Tropical Medicine by the American Society of Tropical Medicine and Hygiene, David E. Rogers Student Fellowship by the New York Academy of Medicine, International Research Fellowship by Stony Brook University School of Medicine, Grants for Emerging Researcher/Clinician Mentorship Program by the Infectious Diseases Society of America.

Authors’ addresses: Eve Ameen and Simon Nin Zhu, Renaissance School of Medicine, Stony Brook University, Stony Brook, NY, E-mails: aeve.ameen@mountsinai.org and simonnin.zhu@stonybrookmedicine.edu. Cesar Morales Guzman, Graciela Meza Sanchez, and César Ramal, Universidad Nacional de la Amazonía Peruana, Iquitos, Peru, E-mails: moralesguzmancesar95@gmail.com, gracielamezasanchez@gmail.com, and ramalasayag@yahoo.fr. Erin Taub, Global Health Institute, Stony Brook University Hospital, Stony Brook, NY, E-mail: erin.taub@stonybrookmedicine.edu. Luis A. Marcos, Global Health Institute, Stony Brook University Hospital, Stony Brook, NY, and Infectious Diseases Division, Department of Medicine, Stony Brook University, Stony Brook, NY, Email: luis.marcosraymundo@stonybrookmedicine.edu. Crystyan Siles, U.S. Naval Medical Research Unit No. 6, Iquitos, Peru, E-mail: csilesm23@hotmail.com. Stalin Vilcarromero, Universidad Peruana Cayetano Heredia, Lima, Peru, E-mail: stalinvil@gmail.com. Nolberto Tangoa, Centro de Salud San Juan, Ministerio de Salud Peruana, Iquitos, Peru, E-mail: nolberto.tangoa@gmail.com.

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