Physical Durability of Two Types of Long-Lasting Insecticidal Nets (LLINs) Three Years After a Mass LLIN Distribution Campaign in Mozambique, 2008–2011

Juliette Morgan President's Malaria Initiative, Malaria Branch, Centers for Disease Control and Prevention, Atlanta, Georgia; Instituto Nacional da Saúde, Ministério da Saúde, Maputo, Mozambique; Programa Nacional de Controlo da Malária, Ministério da Saúde, Maputo, Mozambique; President's Malaria Initiative, Malaria Branch, Centers for Disease Control and Prevention, Atlanta, Georgia; President's Malaria Initiative, Entomology Branch, Centers for Disease Control and Prevention, Atlanta, Georgia

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Ana Paula Abílio President's Malaria Initiative, Malaria Branch, Centers for Disease Control and Prevention, Atlanta, Georgia; Instituto Nacional da Saúde, Ministério da Saúde, Maputo, Mozambique; Programa Nacional de Controlo da Malária, Ministério da Saúde, Maputo, Mozambique; President's Malaria Initiative, Malaria Branch, Centers for Disease Control and Prevention, Atlanta, Georgia; President's Malaria Initiative, Entomology Branch, Centers for Disease Control and Prevention, Atlanta, Georgia

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Maria do Rosario Pondja President's Malaria Initiative, Malaria Branch, Centers for Disease Control and Prevention, Atlanta, Georgia; Instituto Nacional da Saúde, Ministério da Saúde, Maputo, Mozambique; Programa Nacional de Controlo da Malária, Ministério da Saúde, Maputo, Mozambique; President's Malaria Initiative, Malaria Branch, Centers for Disease Control and Prevention, Atlanta, Georgia; President's Malaria Initiative, Entomology Branch, Centers for Disease Control and Prevention, Atlanta, Georgia

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Dulcisária Marrenjo President's Malaria Initiative, Malaria Branch, Centers for Disease Control and Prevention, Atlanta, Georgia; Instituto Nacional da Saúde, Ministério da Saúde, Maputo, Mozambique; Programa Nacional de Controlo da Malária, Ministério da Saúde, Maputo, Mozambique; President's Malaria Initiative, Malaria Branch, Centers for Disease Control and Prevention, Atlanta, Georgia; President's Malaria Initiative, Entomology Branch, Centers for Disease Control and Prevention, Atlanta, Georgia

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Jacinta Luciano President's Malaria Initiative, Malaria Branch, Centers for Disease Control and Prevention, Atlanta, Georgia; Instituto Nacional da Saúde, Ministério da Saúde, Maputo, Mozambique; Programa Nacional de Controlo da Malária, Ministério da Saúde, Maputo, Mozambique; President's Malaria Initiative, Malaria Branch, Centers for Disease Control and Prevention, Atlanta, Georgia; President's Malaria Initiative, Entomology Branch, Centers for Disease Control and Prevention, Atlanta, Georgia

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Guilhermina Fernandes President's Malaria Initiative, Malaria Branch, Centers for Disease Control and Prevention, Atlanta, Georgia; Instituto Nacional da Saúde, Ministério da Saúde, Maputo, Mozambique; Programa Nacional de Controlo da Malária, Ministério da Saúde, Maputo, Mozambique; President's Malaria Initiative, Malaria Branch, Centers for Disease Control and Prevention, Atlanta, Georgia; President's Malaria Initiative, Entomology Branch, Centers for Disease Control and Prevention, Atlanta, Georgia

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Samira Sabindy President's Malaria Initiative, Malaria Branch, Centers for Disease Control and Prevention, Atlanta, Georgia; Instituto Nacional da Saúde, Ministério da Saúde, Maputo, Mozambique; Programa Nacional de Controlo da Malária, Ministério da Saúde, Maputo, Mozambique; President's Malaria Initiative, Malaria Branch, Centers for Disease Control and Prevention, Atlanta, Georgia; President's Malaria Initiative, Entomology Branch, Centers for Disease Control and Prevention, Atlanta, Georgia

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Adam Wolkon President's Malaria Initiative, Malaria Branch, Centers for Disease Control and Prevention, Atlanta, Georgia; Instituto Nacional da Saúde, Ministério da Saúde, Maputo, Mozambique; Programa Nacional de Controlo da Malária, Ministério da Saúde, Maputo, Mozambique; President's Malaria Initiative, Malaria Branch, Centers for Disease Control and Prevention, Atlanta, Georgia; President's Malaria Initiative, Entomology Branch, Centers for Disease Control and Prevention, Atlanta, Georgia

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Gabriel Ponce de Leon President's Malaria Initiative, Malaria Branch, Centers for Disease Control and Prevention, Atlanta, Georgia; Instituto Nacional da Saúde, Ministério da Saúde, Maputo, Mozambique; Programa Nacional de Controlo da Malária, Ministério da Saúde, Maputo, Mozambique; President's Malaria Initiative, Malaria Branch, Centers for Disease Control and Prevention, Atlanta, Georgia; President's Malaria Initiative, Entomology Branch, Centers for Disease Control and Prevention, Atlanta, Georgia

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Adeline Chan President's Malaria Initiative, Malaria Branch, Centers for Disease Control and Prevention, Atlanta, Georgia; Instituto Nacional da Saúde, Ministério da Saúde, Maputo, Mozambique; Programa Nacional de Controlo da Malária, Ministério da Saúde, Maputo, Mozambique; President's Malaria Initiative, Malaria Branch, Centers for Disease Control and Prevention, Atlanta, Georgia; President's Malaria Initiative, Entomology Branch, Centers for Disease Control and Prevention, Atlanta, Georgia

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Jodi Vanden Eng President's Malaria Initiative, Malaria Branch, Centers for Disease Control and Prevention, Atlanta, Georgia; Instituto Nacional da Saúde, Ministério da Saúde, Maputo, Mozambique; Programa Nacional de Controlo da Malária, Ministério da Saúde, Maputo, Mozambique; President's Malaria Initiative, Malaria Branch, Centers for Disease Control and Prevention, Atlanta, Georgia; President's Malaria Initiative, Entomology Branch, Centers for Disease Control and Prevention, Atlanta, Georgia

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We conducted a prospective evaluation to measure the physical durability of two brands of long-lasting insecticidal nets (LLINs) distributed during a campaign in 2008 in Nampula Province, Mozambique. Households with LLINs tagged during the campaign (6,000) were geo-located (34%) and a random sample was selected for each of 3 years of follow-up. The LLINs were evaluated in the field and a laboratory for presence of holes and a proportional hole index (pHI) was calculated following the World Health Organization guidelines. We performed 567 interviews (79.0%) and found 75.3% (72.1–78.4%) of households retained at least one LLIN after 3 years; the most common cause of attrition was damage beyond repair (51.0%). Hole damage was evident after 1 year, and increased by year. Olyset had a significantly greater mean number of holes and pHI compared with PermaNet 2.0 brand (all P values ≤ 0.001). Additional information about LLIN durability is recommended to improve malaria control efforts.

Author Notes

* Address correspondence to Gabriel Ponce de Leon, Centers for Disease Control and Prevention, Malaria Branch, 1600 Clifton Road, MS A06, Atlanta, GA 30033. E-mail: gcp1@cdc.gov

Authors' addresses: Juliette Morgan, Centers for Disease Control and Prevention, South Caucasus, Global Disease Detection Program, Tibilisi, GA, E-mail: jtm7@cdc.gov. Ana Paula Abilio, Jacinta Luciano, and Samira Sabindy, Instituto National da Saùde, Ministério, Maputo, Mozambique, E-mails: anabilio1408@gmail.com, jacinta.luciano@gmail.com, and sasibindy-mz@hotmail.com. Maria do Rosario Pondja, Dulcisaria Marrenjo, and Gilhermina Ferandes, Ministério da Saùde, Programa Nacional de Controlo da Malária, Maputo, Mozmbique, E-mails: rosepondja@yahoo.com.br, dulcisaria@yahoo.com, and gracfernandes@yahoo.com.br. Adam Wolkon, Centers for Disease Control and Prevention, Malaria Branch/President's Malaria Initiative, Atlanta, GA, E-mail: aow5@cdc.gov. Gabriel Ponce de Leon, Centers for Disease Control and Prevention, Malaria Branch, Atlanta, GA, E-mail: gcp1@cdc.gov. Adeline Chan, Centers for Disease Control and Prevention, Entomology Branch/President's Malaria Initiative, Atlanta GA, E-mail: asc8@cdc.gov. Jodi Vanden Eng, Centers for Disease Control and Prevention, Data Management Activity, Atlanta, GA, E-mail: jev8@cdc.gov.

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