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Dr Sammy Michugu Njenga

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    Publications listed below are automatically derived from MEDLINE/PubMed and other sources, which might result in incorrect or missing publications. Faculty can login to make corrections and additions.
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    1. Okoyo C, Mwandawiro C, Kihara J, Simiyu E, Gitonga CW, Noor AM, Njenga SM, Snow RW. Comparing insecticide-treated bed net use to Plasmodium falciparum infection among schoolchildren living near Lake Victoria, Kenya. Malar J. 2015 Dec 22; 14:515. PMID: 26696416; PMCID: PMC4688986.
    2. Moraga P, Cano J, Baggaley RF, Gyapong JO, Njenga SM, Nikolay B, Davies E, Rebollo MP, Pullan RL, Bockarie MJ, Hollingsworth TD, Gambhir M, Brooker SJ. Modelling the distribution and transmission intensity of lymphatic filariasis in sub-Saharan Africa prior to scaling up interventions: integrated use of geostatistical and mathematical modelling. Parasit Vectors. 2015 Oct 24; 8:560. PMID: 26496983; PMCID: PMC4620019.
    3. Irvine MA, Reimer LJ, Njenga SM, Gunawardena S, Kelly-Hope L, Bockarie M, Hollingsworth TD. Modelling strategies to break transmission of lymphatic filariasis--aggregation, adherence and vector competence greatly alter elimination. Parasit Vectors. 2015 Oct 22; 8:547. PMID: 26489753; PMCID: PMC4618540.
    4. Brooker SJ, Mwandawiro CS, Halliday KE, Njenga SM, Mcharo C, Gichuki PM, Wasunna B, Kihara JH, Njomo D, Alusala D, Chiguzo A, Turner HC, Teti C, Gwayi-Chore C, Nikolay B, Truscott JE, Hollingsworth TD, Balabanova D, Griffiths UK, Freeman MC, Allen E, Pullan RL, Anderson RM. Interrupting transmission of soil-transmitted helminths: a study protocol for cluster randomised trials evaluating alternative treatment strategies and delivery systems in Kenya. BMJ Open. 2015 Oct 19; 5(10):e008950. PMID: 26482774; PMCID: PMC4611208.
    5. Nikolay B, Mwandawiro CS, Kihara JH, Okoyo C, Cano J, Mwanje MT, Sultani H, Alusala D, Turner HC, Teti C, Garn J, Freeman MC, Allen E, Anderson RM, Pullan RL, Njenga SM, Brooker SJ. Understanding Heterogeneity in the Impact of National Neglected Tropical Disease Control Programmes: Evidence from School-Based Deworming in Kenya. PLoS Negl Trop Dis. 2015 Sep; 9(9):e0004108. PMID: 26421808; PMCID: PMC4589351.
    6. Tanigawa C, Fujii Y, Miura M, Nzou SM, Mwangi AW, Nagi S, Hamano S, Njenga SM, Mbanefo EC, Hirayama K, Mwau M, Kaneko S. Species-Specific Serological Detection for Schistosomiasis by Serine Protease Inhibitor (SERPIN) in Multiplex Assay. PLoS Negl Trop Dis. 2015; 9(8):e0004021. PMID: 26291988; PMCID: PMC4546333.
    7. Minakawa N, Kongere JO, Dida GO, Ikeda E, Hu J, Minagawa K, Futami K, Kawada H, Njenga SM, Larson PS. Sleeping on the floor decreases insecticide treated bed net use and increases risk of malaria in children under 5 years of age in Mbita District, Kenya. Parasitology. 2015 Oct; 142(12):1516-22. PMID: 26282826.
      View in: PubMed
    8. Freeman MC, Chard AN, Nikolay B, Garn JV, Okoyo C, Kihara J, Njenga SM, Pullan RL, Brooker SJ, Mwandawiro CS. Associations between school- and household-level water, sanitation and hygiene conditions and soil-transmitted helminth infection among Kenyan school children. Parasit Vectors. 2015 Aug 07; 8:412. PMID: 26248869; PMCID: PMC4528701.
    9. Masaku J, Madigu N, Okoyo C, Njenga SM. Current status of Schistosoma mansoni and the factors associated with infection two years following mass drug administration programme among primary school children in Mwea irrigation scheme: A cross-sectional study. BMC Public Health. 2015 Aug 01; 15:739. PMID: 26231050; PMCID: PMC4522152.
    10. Cano J, Moraga P, Nikolay B, Rebollo MP, Okorie PN, Davies E, Njenga SM, Bockarie MJ, Brooker SJ. An investigation of the disparity in estimates of microfilaraemia and antigenaemia in lymphatic filariasis surveys. Trans R Soc Trop Med Hyg. 2015 Aug; 109(8):529-31. PMID: 26101292; PMCID: PMC4542699.
    11. Kepha S, Nuwaha F, Nikolay B, Gichuki P, Edwards T, Allen E, Njenga SM, Mwandawiro CS, Brooker SJ. Epidemiology of coinfection with soil transmitted helminths and Plasmodium falciparum among school children in Bumula District in western Kenya. Parasit Vectors. 2015 Jun 11; 8:314. PMID: 26063324; PMCID: PMC4486705.
    12. Harris JR, Worrell CM, Davis SM, Odero K, Mogeni OD, Deming MS, Mohammed A, Montgomery JM, Njenga SM, Fox LM, Addiss DG. Unprogrammed deworming in the Kibera slum, Nairobi: implications for control of soil-transmitted helminthiases. PLoS Negl Trop Dis. 2015 Mar; 9(3):e0003590. PMID: 25763577; PMCID: PMC4357447.
    13. Smith JL, Sturrock HJ, Assefa L, Nikolay B, Njenga SM, Kihara J, Mwandawiro CS, Brooker SJ. Factors associated with the performance and cost-effectiveness of using lymphatic filariasis transmission assessment surveys for monitoring soil-transmitted helminths: a case study in Kenya. Am J Trop Med Hyg. 2015 Feb; 92(2):342-53. PMID: 25487730; PMCID: PMC4347340.
    14. Larson PS, Minakawa N, Dida GO, Njenga SM, Ionides EL, Wilson ML. Insecticide-treated net use before and after mass distribution in a fishing community along Lake Victoria, Kenya: successes and unavoidable pitfalls. Malar J. 2014 Nov 28; 13:466. PMID: 25431086; PMCID: PMC4289357.
    15. Kawada H, Dida GO, Ohashi K, Kawashima E, Sonye G, Njenga SM, Mwandawiro C, Minakawa N. A small-scale field trial of pyriproxyfen-impregnated bed nets against pyrethroid-resistant Anopheles gambiae s.s. in western Kenya. PLoS One. 2014; 9(10):e111195. PMID: 25333785; PMCID: PMC4205095.
    16. Davis SM, Worrell CM, Wiegand RE, Odero KO, Suchdev PS, Ruth LJ, Lopez G, Cosmas L, Neatherlin J, Njenga SM, Montgomery JM, Fox LM. Soil-transmitted helminths in pre-school-aged and school-aged children in an urban slum: a cross-sectional study of prevalence, distribution, and associated exposures. Am J Trop Med Hyg. 2014 Nov; 91(5):1002-10. PMID: 25157123; PMCID: PMC4228865.
    17. Kawada H, Ohashi K, Dida GO, Sonye G, Njenga SM, Mwandawiro C, Minakawa N. Preventive effect of permethrin-impregnated long-lasting insecticidal nets on the blood feeding of three major pyrethroid-resistant malaria vectors in western Kenya. Parasit Vectors. 2014 Aug 20; 7:383. PMID: 25141947; PMCID: PMC4150967.
    18. Fujii Y, Kaneko S, Nzou SM, Mwau M, Njenga SM, Tanigawa C, Kimotho J, Mwangi AW, Kiche I, Matsumoto S, Niki M, Osada-Oka M, Ichinose Y, Inoue M, Itoh M, Tachibana H, Ishii K, Tsuboi T, Yoshida LM, Mondal D, Haque R, Hamano S, Changoma M, Hoshi T, Kamo K, Karama M, Miura M, Hirayama K. Serological surveillance development for tropical infectious diseases using simultaneous microsphere-based multiplex assays and finite mixture models. PLoS Negl Trop Dis. 2014; 8(7):e3040. PMID: 25078404; PMCID: PMC4117437.
    19. Mbaya H, Magambo J, Njenga S, Zeyhle E, Mbae C, Mulinge E, Wassermann M, Kern P, Romig T. Echinococcus spp. in central Kenya: a different story. Parasitol Res. 2014 Oct; 113(10):3789-94. PMID: 25056944.
      View in: PubMed
    20. Nagi S, Chadeka EA, Sunahara T, Mutungi F, Justin YK, Kaneko S, Ichinose Y, Matsumoto S, Njenga SM, Hashizume M, Shimada M, Hamano S. Risk factors and spatial distribution of Schistosoma mansoni infection among primary school children in Mbita District, Western Kenya. PLoS Negl Trop Dis. 2014 Jul; 8(7):e2991. PMID: 25058653; PMCID: PMC4109881.
    21. Assefa LM, Crellen T, Kepha S, Kihara JH, Njenga SM, Pullan RL, Brooker SJ. Diagnostic accuracy and cost-effectiveness of alternative methods for detection of soil-transmitted helminths in a post-treatment setting in western Kenya. PLoS Negl Trop Dis. 2014 May; 8(5):e2843. PMID: 24810593; PMCID: PMC4014443.
    22. Kawada H, Ohashi K, Dida GO, Sonye G, Njenga SM, Mwandawiro C, Minakawa N. Insecticidal and repellent activities of pyrethroids to the three major pyrethroid-resistant malaria vectors in western Kenya. Parasit Vectors. 2014 May 02; 7:208. PMID: 24885499; PMCID: PMC4017225.
    23. Kagendo D, Magambo J, Agola EL, Njenga SM, Zeyhle E, Mulinge E, Gitonga P, Mbae C, Muchiri E, Wassermann M, Kern P, Romig T. A survey for Echinococcus spp. of carnivores in six wildlife conservation areas in Kenya. Parasitol Int. 2014 Aug; 63(4):604-11. PMID: 24732034.
      View in: PubMed
    24. Njenga SM, Mutungi FM, Wamae CN, Mwanje MT, Njiru KK, Bockarie MJ. Once a year school-based deworming with praziquantel and albendazole combination may not be adequate for control of urogenital schistosomiasis and hookworm infection in Matuga District, Kwale County, Kenya. Parasit Vectors. 2014 Feb 19; 7:74. PMID: 24552246; PMCID: PMC3936945.
    25. Futami K, Dida GO, Sonye GO, Lutiali PA, Mwania MS, Wagalla S, Lumumba J, Kongere JO, Njenga SM, Minakawa N. Impacts of insecticide treated bed nets on Anopheles gambiae s.l. populations in Mbita district and Suba district, Western Kenya. Parasit Vectors. 2014 Feb 11; 7:63. PMID: 24517160; PMCID: PMC3925958.
    26. Njenga SM, Ng'ang'a PM, Mwanje MT, Bendera FS, Bockarie MJ. A school-based cross-sectional survey of adverse events following co-administration of albendazole and praziquantel for preventive chemotherapy against urogenital schistosomiasis and soil-transmitted helminthiasis in Kwale County, Kenya. PLoS One. 2014; 9(2):e88315. PMID: 24520365; PMCID: PMC3919734.
    27. Iwashita H, Dida GO, Sonye GO, Sunahara T, Futami K, Njenga SM, Chaves LF, Minakawa N. Push by a net, pull by a cow: can zooprophylaxis enhance the impact of insecticide treated bed nets on malaria control? Parasit Vectors. 2014 Jan 28; 7:52. PMID: 24472517; PMCID: PMC3917899.
    28. Suchdev PS, Davis SM, Bartoces M, Ruth LJ, Worrell CM, Kanyi H, Odero K, Wiegand RE, Njenga SM, Montgomery JM, Fox LM. Soil-transmitted helminth infection and nutritional status among urban slum children in Kenya. Am J Trop Med Hyg. 2014 Feb; 90(2):299-305. PMID: 24343884; PMCID: PMC3919237.
    29. Arnold BF, Null C, Luby SP, Unicomb L, Stewart CP, Dewey KG, Ahmed T, Ashraf S, Christensen G, Clasen T, Dentz HN, Fernald LC, Haque R, Hubbard AE, Kariger P, Leontsini E, Lin A, Njenga SM, Pickering AJ, Ram PK, Tofail F, Winch PJ, Colford JM. Cluster-randomised controlled trials of individual and combined water, sanitation, hygiene and nutritional interventions in rural Bangladesh and Kenya: the WASH Benefits study design and rationale. BMJ Open. 2013 Aug 30; 3(8):e003476. PMID: 23996605; PMCID: PMC3758977.
    30. Mwandawiro CS, Nikolay B, Kihara JH, Ozier O, Mukoko DA, Mwanje MT, Hakobyan A, Pullan RL, Brooker SJ, Njenga SM. Monitoring and evaluating the impact of national school-based deworming in Kenya: study design and baseline results. Parasit Vectors. 2013 Jul 05; 6:198. PMID: 23829767; PMCID: PMC3723516.
    31. Itokawa K, Komagata O, Kasai S, Kawada H, Mwatele C, Dida GO, Njenga SM, Mwandawiro C, Tomita T. Global spread and genetic variants of the two CYP9M10 haplotype forms associated with insecticide resistance in Culex quinquefasciatus Say. Heredity (Edinb). 2013 Sep; 111(3):216-26. PMID: 23632895; PMCID: PMC3746819.
    32. O'Neill HG, Mzilahowa T, de Deus N, Njenga SM, Mmbaga EJ, Kariuki TM. Evaluation of the European foundation initiative into African research in neglected tropical diseases by the African fellows. PLoS Negl Trop Dis. 2013; 7(3):e2019. PMID: 23516641; PMCID: PMC3597492.
    33. Njomo DW, Amuyunzu-Nyamongo M, Magambo JK, Njenga SM. The role of personal opinions and experiences in compliance with mass drug administration for lymphatic filariasis elimination in Kenya. PLoS One. 2012; 7(11):e48395. PMID: 23185256; PMCID: PMC3501492.
    34. Gitonga CW, Kihara JH, Njenga SM, Awuondo K, Noor AM, Snow RW, Brooker SJ. Use of rapid diagnostic tests in malaria school surveys in Kenya: does their under-performance matter for planning malaria control? Am J Trop Med Hyg. 2012 Dec; 87(6):1004-11. PMID: 23091194; PMCID: PMC3516067.
    35. Kawada H, Dida GO, Sonye G, Njenga SM, Mwandawiro C, Minakawa N. Reconsideration of Anopheles rivulorum as a vector of Plasmodium falciparum in western Kenya: some evidence from biting time, blood preference, sporozoite positive rate, and pyrethroid resistance. Parasit Vectors. 2012 Oct 10; 5:230. PMID: 23050856; PMCID: PMC3485129.
    36. Minakawa N, Dida GO, Sonye GO, Futami K, Njenga SM. Malaria vectors in Lake Victoria and adjacent habitats in western Kenya. PLoS One. 2012; 7(3):e32725. PMID: 22412913; PMCID: PMC3297610.
    37. Kawada H, Dida GO, Ohashi K, Sonye G, Njenga SM, Mwandawiro C, Minakawa N, Takagi M. Preliminary evaluation of insecticide-impregnated ceiling nets with coarse mesh size as a barrier against the invasion of malaria vectors. Jpn J Infect Dis. 2012; 65(3):243-6. PMID: 22627307.
      View in: PubMed
    38. Njenga SM, Mwandawiro CS, Muniu E, Mwanje MT, Haji FM, Bockarie MJ. Adult population as potential reservoir of NTD infections in rural villages of Kwale district, Coastal Kenya: implications for preventive chemotherapy interventions policy. Parasit Vectors. 2011 Sep 14; 4:175. PMID: 21917166; PMCID: PMC3212820.
    39. Kawada H, Futami K, Komagata O, Kasai S, Tomita T, Sonye G, Mwatele C, Njenga SM, Mwandawiro C, Minakawa N, Takagi M. Distribution of a knockdown resistance mutation (L1014S) in Anopheles gambiae s.s. and Anopheles arabiensis in western and southern Kenya. PLoS One. 2011; 6(9):e24323. PMID: 21931682; PMCID: PMC3170322.
    40. Kawada H, Dida GO, Ohashi K, Komagata O, Kasai S, Tomita T, Sonye G, Maekawa Y, Mwatele C, Njenga SM, Mwandawiro C, Minakawa N, Takagi M. Multimodal pyrethroid resistance in malaria vectors, Anopheles gambiae s.s., Anopheles arabiensis, and Anopheles funestus s.s. in western Kenya. PLoS One. 2011; 6(8):e22574. PMID: 21853038; PMCID: PMC3154902.
    41. Kariuki T, Phillips R, Njenga S, Olesen OF, Klatser PR, Porro R, Lock S, Cabral MH, Gliber M, Hanne D. Research and capacity building for control of neglected tropical diseases: the need for a different approach. PLoS Negl Trop Dis. 2011; 5(5):e1020. PMID: 21655352; PMCID: PMC3104960.
    42. Njenga SM, Mwandawiro CS, Wamae CN, Mukoko DA, Omar AA, Shimada M, Bockarie MJ, Molyneux DH. Sustained reduction in prevalence of lymphatic filariasis infection in spite of missed rounds of mass drug administration in an area under mosquito nets for malaria control. Parasit Vectors. 2011 May 25; 4:90. PMID: 21612649; PMCID: PMC3125382.
    43. Futami K, Kongere JO, Mwania MS, Lutiali PA, Njenga SM, Minakawa N. Effects of Bacillus thuringiensis israelensis on Anopheles arabiensis. J Am Mosq Control Assoc. 2011 Mar; 27(1):81-3. PMID: 21476453.
      View in: PubMed
    44. Wamae CN, Njenga SM, Ngugi BM, Mbui J, Njaanake HK. Evaluation of effectiveness of diethylcarbamazine/albendazole combination in reduction of Wuchereria bancrofti infection using multiple infection parameters. Acta Trop. 2011 Sep; 120 Suppl 1:S33-8. PMID: 20933491.
      View in: PubMed
    45. Kyelem D, Biswas G, Bockarie MJ, Bradley MH, El-Setouhy M, Fischer PU, Henderson RH, Kazura JW, Lammie PJ, Njenga SM, Ottesen EA, Ramaiah KD, Richards FO, Weil GJ, Williams SA. Determinants of success in national programs to eliminate lymphatic filariasis: a perspective identifying essential elements and research needs. Am J Trop Med Hyg. 2008 Oct; 79(4):480-4. PMID: 18840733; PMCID: PMC2694403.
    46. Njenga SM, Wamae CN, Njomo DW, Mwandawiro CS, Molyneux DH. Impact of two rounds of mass treatment with diethylcarbamazine plus albendazole on Wuchereria bancrofti infection and the sensitivity of immunochromatographic test in Malindi, Kenya. Trans R Soc Trop Med Hyg. 2008 Oct; 102(10):1017-24. PMID: 18550135.
      View in: PubMed
    47. Njenga SM, Wamae CN, Mwandawiro CS, Molyneux DH. Immuno-parasitological assessment of bancroftian filariasis in a highly endemic area along the River Sabaki, in Malindi district, Kenya. Ann Trop Med Parasitol. 2007 Mar; 101(2):161-72. PMID: 17316502.
      View in: PubMed
    48. Njenga SM, Wamae CN, Njomo DW, Mwandawiro CS, Molyneux DH. Chronic clinical manifestations related to Wuchereria bancrofti infection in a highly endemic area in Kenya. Trans R Soc Trop Med Hyg. 2007 May; 101(5):439-44. PMID: 17145069.
      View in: PubMed
    49. Wamae N, Njenga SM, Kisingu WM, Muthigani PW, Kiiru K. Community-directed treatment of lymphatic filariasis in Kenya and its role in the national programmes for elimination of lymphatic filariasis. Afr J Health Sci. 2006 Jan-Jun; 13(1-2):69-79. PMID: 17348745.
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    50. Luo M, Embree J, Ramdahin S, Ndinya-Achola J, Njenga S, Bwayo JB, Pan S, Mao X, Cheang M, Stuart T, Brunham RC, Plummer FA. HLA-A and HLA-B in Kenya, Africa: allele frequencies and identification of HLA-B*1567 and HLA-B*4426. Tissue Antigens. 2002 May; 59(5):370-80. PMID: 12144620.
      View in: PubMed
    51. Wamae CN, Mwandawiro C, Wambayi E, Njenga S, Kiliku F. Lymphatic filariasis in kenya since 1910, and the prospects for its elimination: a review. East Afr Med J. 2001 Nov; 78(11):595-603. PMID: 12219966.
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    52. Njenga SM, Wamae CN. Evaluation of ICT filariasis card test using whole capillary blood: comparison with Knott's concentration and counting chamber methods. J Parasitol. 2001 Oct; 87(5):1140-3. PMID: 11695380.
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    53. Embree J, Bwayo J, Nagelkerke N, Njenga S, Nyange P, Ndinya-Achola J, Pamba H, Plummer F. Lymphocyte subsets in human immunodeficiency virus type 1-infected and uninfected children in Nairobi. Pediatr Infect Dis J. 2001 Apr; 20(4):397-403. PMID: 11332664.
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    54. Sherry B, Embree JE, Mei Z, Ndinya-Achola JO, Njenga S, Muchunga ER, Bett J, Plummer FA. Sociodemographic characteristics, care, feeding practices, and growth of cohorts of children born to HIV-1 seropositive and seronegative mothers in Nairobi, Kenya. Trop Med Int Health. 2000 Oct; 5(10):678-86. PMID: 11044261.
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    55. Njenga SM, Muita M, Kirigi G, Mbugua J, Mitsui Y, Fujimaki Y, Aoki Y. Bancroftian filariasis in Kwale district, Kenya. East Afr Med J. 2000 May; 77(5):245-9. PMID: 12858914.
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    56. Murray MC, Embree JE, Ramdahin SG, Anzala AO, Njenga S, Plummer FA. Effect of human immunodeficiency virus (HIV) type 1 viral genotype on mother-to-child transmission of HIV-1. J Infect Dis. 2000 Feb; 181(2):746-9. PMID: 10669368.
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    57. MacDonald KS, Embree J, Njenga S, Nagelkerke NJ, Ngatia I, Mohammed Z, Barber BH, Ndinya-Achola J, Bwayo J, Plummer FA. Mother-child class I HLA concordance increases perinatal human immunodeficiency virus type 1 transmission. J Infect Dis. 1998 Mar; 177(3):551-6. PMID: 9498431.
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