Timothy Kellogg

Title(s)Senior Epi/Biostat Officer, Prevention & Public Health
Address550 16th. Street
San Francisco CA 94158
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    Collapse Education and Training
    San Francisco State University, San Francisco, CABA05/2004History
    San Francisco State University, San Francisco, CAMA05/1985Ecology and Systematic Biology
    San Francisco State University, San Francisco, CABA05/1982Biology
    University of Michigan, Ann Arbor1991/92Epidemiology and Biostatistics

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    Tim is a epidemiologist/technical advisor with broad experience in domestic and International HIV/AIDS surveillance projects. Between 2010 to 2016, he was technical advisor in Nairobi Kenya assisting the Ministry of Health with a variety of surveillance projects, including the Kenya AIDS Indicator Survey (KAIS), an evaluation of Kenya's readiness to transition from ANC sentinel surveys to the use of routine PMTCT program data for surveillance purposes, and a pilot of a case-based surveillance (CBS) system in Western Kenya. Currently, he is based in Windhoek Namibia assisting the Global Programs Namibia Office with the implementation of the NAMPHIA survey.

    Besides HIV surveillance, Tim specializes in data analysis, results dissemination through reports and publications, and capacity building of in-country institutions, organizations, and individuals. He has mentoring many Kenyan epidemiologists, including residents of the Field Epidemiology Laboratory Training Program (FELTP), in HIV surveillance methods and developing manuscripts for publication.

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    Publications listed below are automatically derived from MEDLINE/PubMed and other sources, which might result in incorrect or missing publications. Researchers can login to make corrections and additions, or contact us for help. to make corrections and additions.
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    Altmetrics Details PMC Citations indicate the number of times the publication was cited by articles in PubMed Central, and the Altmetric score represents citations in news articles and social media. (Note that publications are often cited in additional ways that are not shown here.) Fields are based on how the National Library of Medicine (NLM) classifies the publication's journal and might not represent the specific topic of the publication. Translation tags are based on the publication type and the MeSH terms NLM assigns to the publication. Some publications (especially newer ones and publications not in PubMed) might not yet be assigned Field or Translation tags.) Click a Field or Translation tag to filter the publications.
    1. Who Are the Men Who Pay for Sex in Mozambique? Results from the National HIV/AIDS Indicator Survey 2015. Arch Sex Behav. 2021 Apr 05. PMID: 33821377.
      View in: PubMed   Mentions:    Fields:    
    2. Intestinal protozoa in hospitalized under-five children with diarrhoea in Nampula - a cross-sectional analysis in a low-income setting in northern Mozambique. BMC Infect Dis. 2021 Feb 23; 21(1):201. Bauhofer AFL, Cossa-Moiane ILC, Marques SDA, Guimarães ELAM, Munlela BA, Anapakala EM, Chiláule JJ, Cassocera M, Langa JS, Chissaque A, Sambo JAM, Manhique-Coutinho LV, Bero DM, Kellogg TA, Gonçalves LAP, de Deus N. PMID: 33622284.
      View in: PubMed   Mentions:    Fields:    Translation:Humans
    3. Prevalence of HIV, viral hepatitis B/C and tuberculosis and treatment outcomes among people who use drugs: Results from the implementation of the first drop-in-center in Mozambique. Int J Drug Policy. 2021 Jan 08; 90:103095. Semá Baltazar C, Kellogg TA, Boothe M, Loarec A, de Abreu E, Condula M, Fazito E, Raymond HF, Temmerman M, Luchters S. PMID: 33429163.
      View in: PubMed   Mentions:    Fields:    
    4. Rotavirus A infection in children under five years old with a double health problem: undernutrition and diarrhoea - a cross-sectional study in four provinces of Mozambique. BMC Infect Dis. 2021 Jan 06; 21(1):18. Chissaque A, Cassocera M, Gasparinho C, Langa JS, Bauhofer AFL, Chilaúle JJ, João ED, Munlela BA, Sambo JAM, Boene SS, Djedje MB, Anapakala EM, Guimarães EL, Bero DM, Manhique-Coutinho LV, Cossa-Moiane I, Kellogg TA, Gonçalves LAP, de Deus N. PMID: 33407207.
      View in: PubMed   Mentions:    Fields:    Translation:HumansAnimalsCells
    5. Prevalence and risk factors associated with HIV/hepatitis B and HIV/hepatitis C co-infections among people who inject drugs in Mozambique. BMC Public Health. 2020 Jun 03; 20(1):851. Semá Baltazar C, Boothe M, Kellogg T, Ricardo P, Sathane I, Fazito E, Raymond HF, Temmerman M, Luchters S. PMID: 32493347.
      View in: PubMed   Mentions:    Fields:    Translation:HumansCellsPHPublic Health
    6. Intestinal protozoan infections among children 0-168 months with diarrhea in Mozambique: June 2014 - January 2018. PLoS Negl Trop Dis. 2020 04; 14(4):e0008195. Bauhofer AFL, Cossa-Moiane I, Marques S, Guimarães EL, Munlela B, Anapakala E, Chilaúle JJ, Cassocera M, Langa JS, Chissaque A, Sambo J, Manhique-Coutinho L, Bero DM, Kellogg TA, de Deus N. PMID: 32320399.
      View in: PubMed   Mentions:    Fields:    Translation:HumansAnimals
    7. Young people who inject drugs in Mozambique: should we emphasize them in the National Harm Reduction Plan? Harm Reduct J. 2020 03 26; 17(1):20. Semá Baltazar C, Boothe M, Kellogg T. PMID: 32216809.
      View in: PubMed   Mentions: 1     Fields:    
    8. Epidemiological profile of individuals diagnosed with HIV: results from the preliminary phase of case-based surveillance in Kenya. AIDS Care. 2020 01; 32(1):43-49. Harklerode R, Waruiru W, Humwa F, Waruru A, Kellogg T, Muthoni L, Macharia J, Zielinski-Gutierrez E. PMID: 31032628.
      View in: PubMed   Mentions:    Fields:    Translation:Humans
    9. Where No Universal Health Care Identifier Exists: Comparison and Determination of the Utility of Score-Based Persons Matching Algorithms Using Demographic Data. JMIR Public Health Surveill. 2018 Dec 13; 4(4):e10436. Waruru A, Natukunda A, Nyagah LM, Kellogg TA, Zielinski-Gutierrez E, Waruiru W, Masamaro K, Harklerode R, Odhiambo J, Manders EJ, Young PW. PMID: 30545805.
      View in: PubMed   Mentions:
    10. Characterization of HIV Recent Infection Among High-Risk Men at Public STI Clinics in Mumbai. AIDS Behav. 2018 Jul; 22(Suppl 1):70-75. Truong HM, Fatch R, Grant RM, Mathur M, Kumta S, Jerajani H, Kellogg TA, Lindan CP. PMID: 29453551.
      View in: PubMed   Mentions: 1     Fields:    Translation:Humans
    11. Modes of HIV transmission among adolescents and young adults aged 10-24 years in Kenya. Int J STD AIDS. 2018 07; 29(8):800-805. Ng'eno BN, Kellogg TA, Kim AA, Mwangi A, Mwangi M, Wamicwe J, Rutherford GW. PMID: 29490572.
      View in: PubMed   Mentions: 4     Fields:    Translation:Humans
    12. HIV-associated mortality in the era of antiretroviral therapy scale-up - Nairobi, Kenya, 2015. PLoS One. 2017; 12(8):e0181837. Young PW, Kim AA, Wamicwe J, Nyagah L, Kiama C, Stover J, Oduor J, Rogena EA, Walong E, Zielinski-Gutierrez E, Imbwaga A, Sirengo M, Kellogg TA, De Cock KM. PMID: 28767714.
      View in: PubMed   Mentions: 2     Fields:    Translation:HumansPHPublic Health
    13. Detectable HIV Viral Load in Kenya: Data from a Population-Based Survey. PLoS One. 2016; 11(5):e0154318. Cherutich P, Kim AA, Kellogg TA, Sherr K, Waruru A, De Cock KM, Rutherford GW. PMID: 27192052.
      View in: PubMed   Mentions: 13     Fields:    Translation:HumansPHPublic Health
    14. Evaluation of Kenya's readiness to transition from sentinel surveillance to routine HIV testing for antenatal clinic-based HIV surveillance. BMC Infect Dis. 2016 Mar 05; 16:113. Sirengo M, Rutherford GW, Otieno-Nyunya B, Kellogg TA, Kimanga D, Muraguri N, Umuro M, Mirjahangir J, Stein E, Ndisha M, Kim AA. PMID: 26945861.
      View in: PubMed   Mentions: 3     Fields:    Translation:HumansPHPublic Health
    15. Estimating the Prevalence and Predictors of Incorrect Condom Use Among Sexually Active Adults in Kenya: Results From a Nationally Representative Survey. Sex Transm Dis. 2016 Feb; 43(2):87-93. Grasso MA, Schwarcz S, Galbraith JS, Musyoki H, Kambona C, Kellogg TA, . PMID: 26766524.
      View in: PubMed   Mentions:    Fields:    Translation:Humans
    16. Perpetrators and context of child sexual abuse in Kenya. Child Abuse Negl. 2015 Jun; 44:46-55. Mwangi MW, Kellogg TA, Brookmeyer K, Buluma R, Chiang L, Otieno-Nyunya B, Chesang K, . PMID: 25882669.
      View in: PubMed   Mentions: 3     Fields:    Translation:Humans
    17. Prevalence of HIV, sexually transmitted infections, and risk behaviours among female sex workers in Nairobi, Kenya: results of a respondent driven sampling study. AIDS Behav. 2015 Feb; 19 Suppl 1:S46-58. Musyoki H, Kellogg TA, Geibel S, Muraguri N, Okal J, Tun W, Fisher Raymond H, Dadabhai S, Sheehy M, Kim AA. PMID: 25428282.
      View in: PubMed   Mentions: 19     Fields:    Translation:HumansPHPublic Health
    18. HIV and STI prevalence and risk factors among male sex workers and other men who have sex with men in Nairobi, Kenya. . 2015 Jan 01; 68(1):91-6. Muraguri N, Tun W, Okal J, Broz D, Raymond HF, Kellogg T, Dadabhai S, Musyoki H, Sheehy M, Kuria D, Kaiser R, Geibel S. PMID: 25501346.
      View in: PubMed   Mentions:
    19. Tuberculosis and HIV at the national level in Kenya: results from the Second Kenya AIDS Indicator Survey. . 2014 May 01; 66 Suppl 1:S106-15. Mbithi A, Gichangi A, Kim AA, Katana A, Weyenga H, Williamson J, Robinson K, Oluoch T, Maina WK, Kellogg TA, De Cock KM, . PMID: 24732814.
      View in: PubMed   Mentions:
    20. Antiretroviral treatment scale-up among persons living with HIV in Kenya: results from a nationally representative survey. . 2014 May 01; 66 Suppl 1:S116-22. Odhiambo JO, Kellogg TA, Kim AA, Ng'ang'a L, Mukui I, Umuro M, Mohammed I, De Cock KM, Kimanga DO, Schwarcz S, . PMID: 24732815.
      View in: PubMed   Mentions:
    21. Mother-to-child transmission of HIV in Kenya: results from a nationally representative study. . 2014 May 01; 66 Suppl 1:S66-74. Sirengo M, Muthoni L, Kellogg TA, Kim AA, Katana A, Mwanyumba S, Kimanga DO, Maina WK, Muraguri N, Elly B, Rutherford GW, . PMID: 24732822.
      View in: PubMed   Mentions:
    22. Factors Associated with Uptake of HIV Test Results in a Nationally Representative Population-Based AIDS Indicator Survey. Open AIDS J. 2014; 8:7-16. Mwangi M, Kellogg TA, Dadabhai SS, Bunnell R, Baltazar G, Ngare C, K'opiyo G, Mburu M, Kim AA. PMID: 24707325.
      View in: PubMed   Mentions:
    23. Comparison of HIV behavioral indicators among men who have sex with men across two survey methodologies, San Francisco, 2004 and 2008. Sex Transm Dis. 2013 Sep; 40(9):689-94. Kellogg TA, Hecht J, Bernstein K, McFarland W, Connors A, Perloff L, Raymond HF. PMID: 23945424.
      View in: PubMed   Mentions: 3     Fields:    Translation:Humans
    24. Balancing theory and practice in respondent-driven sampling: a case study of innovations developed to overcome recruitment challenges. PLoS One. 2013; 8(8):e70344. Truong HM, Grasso M, Chen YH, Kellogg TA, Robertson T, Curotto A, Steward WT, McFarland W. PMID: 23990901.
      View in: PubMed   Mentions: 12     Fields:    Translation:Humans
    25. HIV voluntary counseling and testing at an abortion clinic: missed opportunities for diagnosis. Contraception. 2013 Jul; 88(1):147-52. Newmann SJ, Dufour MS, McFarland W, Oderman L, Kellogg T, Louie B, Drey EA. PMID: 23312935.
      View in: PubMed   Mentions: 1     Fields:    Translation:HumansPHPublic Health
    26. Male circumcision programmes in Kenya: lessons from the Kenya AIDS Indicator Survey 2007. Bull World Health Organ. 2012 Sep 01; 90(9):642-51. Mwandi Z, Bunnell R, Cherutich P, Mermin J, Kim AA, Gichangi A, Mureithi P, Kellogg TA, Oluoch T, Muttunga J, Ngare C, Kim E, Kaiser R. PMID: 22984308.
      View in: PubMed   Mentions: 3     Fields:    Translation:HumansCells
    27. Evaluation of a peer network-based sexual risk reduction intervention for men in beer halls in Zimbabwe: results from a randomized controlled trial. AIDS Behav. 2011 Nov; 15(8):1732-44. Fritz K, McFarland W, Wyrod R, Chasakara C, Makumbe K, Chirowodza A, Mashoko C, Kellogg T, Woelk G. PMID: 21380493.
      View in: PubMed   Mentions: 22     Fields:    Translation:Humans
    28. Sentinel surveillance of HIV-1 transmitted drug resistance, acute infection and recent infection. PLoS One. 2011; 6(10):e25281. Truong HM, Kellogg TA, McFarland W, Louie B, Klausner JD, Philip SS, Grant RM. PMID: 22046237.
      View in: PubMed   Mentions: 20     Fields:    Translation:HumansCellsPHPublic Health
    29. Beyond sugar daddies: intergenerational sex and AIDS in urban Zimbabwe. AIDS Behav. 2011 Aug; 15(6):1275-82. Wyrod R, Fritz K, Woelk G, Jain S, Kellogg T, Chirowodza A, Makumbe K, McFarland W. PMID: 20811939.
      View in: PubMed   Mentions: 8     Fields:    Translation:Humans
    30. Time to clearance of Chlamydia trachomatis ribosomal RNA in women treated for chlamydial infection. Sex Health. 2011 Mar; 8(1):69-73. Renault CA, Israelski DM, Levy V, Fujikawa BK, Kellogg TA, Klausner JD. PMID: 21371385.
      View in: PubMed   Mentions: 16     Fields:    Translation:HumansCells
    31. Recent HIV-1 infection detection: comparison of incidence estimates derived by laboratory assays and repeat testing data. . 2009 Aug 01; 51(4):502-5. Truong HM, Kellogg T, Louie B, Klausner J, Dilley J, McFarland W. PMID: 19387356.
      View in: PubMed   Mentions:
    32. Hepatitis B sero-prevalence and risk behaviors among immigrant men in a population-based household survey in low-income neighborhoods of northern California. J Immigr Minor Health. 2010 Dec; 12(6):828-33. Levy V, Yuan J, Ruiz J, Morrow S, Reardon J, Facer M, Molitor F, Allen B, Ajufo BG, Bell-Sanford G, McFarland W, Raymond HF, Kellogg T, Page K. PMID: 19319680.
      View in: PubMed   Mentions: 4     Fields:    Translation:HumansCellsPHPublic Health
    33. Frequent international travel by men who have sex with men recently diagnosed with HIV-1: potential for transmission of primary HIV-1 drug resistance. J Travel Med. 2008 Nov-Dec; 15(6):454-6. Truong HM, Kellogg T, Schwarcz S, Delgado V, Grant RM, Louie B, Ngo H, McFarland W. PMID: 19090802.
      View in: PubMed   Mentions: 5     Fields:    Translation:HumansCells
    34. The Internet, HIV serosorting and transmission risk among men who have sex with men, San Francisco. AIDS. 2008 Mar 30; 22(6):787-9. Berry M, Raymond HF, Kellogg T, McFarland W. PMID: 18356611.
      View in: PubMed   Mentions: 18     Fields:    Translation:Humans
    35. Characteristics of persons with recently acquired HIV infection: application of the serologic testing algorithm for recent HIV seroconversion in 10 US cities. . 2007 Jan 01; 44(1):112-5. Schwarcz S, Weinstock H, Louie B, Kellogg T, Douglas J, Lalota M, Dickinson G, Torian L, Wendell D, Paul S, Goza G, Ruiz J, Boyett B, McCormick L, Bennett D. PMID: 17075386.
      View in: PubMed   Mentions:
    36. Routine surveillance for the detection of acute and recent HIV infections and transmission of antiretroviral resistance. AIDS. 2006 Nov 14; 20(17):2193-7. Truong HM, Grant RM, McFarland W, Kellogg T, Kent C, Louie B, Wong E, Klausner JD. PMID: 17086059.
      View in: PubMed   Mentions: 29     Fields:    Translation:Humans
    37. Assessing the feasibility of harm reduction services for MSM: the late night breakfast buffet study. Harm Reduct J. 2006 Oct 03; 3:29. Rose VJ, Raymond HF, Kellogg TA, McFarland W. PMID: 17018154.
      View in: PubMed   Mentions: 5     Fields:    
    38. Contraceptive intentions among adolescents after abortion. J Adolesc Health. 2006 Aug; 39(2):283-6. Truong HM, Kellogg T, McFarland W, Kang MS, Darney P, Drey EA. PMID: 16857542.
      View in: PubMed   Mentions:    Fields:    Translation:Humans
    39. Amphetamine use is associated with increased HIV incidence among men who have sex with men in San Francisco. AIDS. 2005 Sep 02; 19(13):1423-4. Buchacz K, McFarland W, Kellogg TA, Loeb L, Holmberg SD, Dilley J, Klausner JD. PMID: 16103774.
      View in: PubMed   Mentions: 70     Fields:    Translation:Humans
    40. HIV sentinel surveillance among women seeking elective pregnancy termination, San Francisco. Sex Transm Dis. 2005 Sep; 32(9):590-2. Drey EA, Darney PD, Louie B, Kellogg TA, Kang MS, Prabhu R, Whitaker AK, Chin J, Molina A, McFarland W. PMID: 16118609.
      View in: PubMed   Mentions: 2     Fields:    Translation:HumansPHPublic Health
    41. Comparison of three methods to measure HIV incidence among persons seeking voluntary, anonymous counseling and testing. . 2005 May 01; 39(1):112-20. Kellogg TA, Loeb L, Dilley J, Adler B, Louie BT, McFarland W. PMID: 15851921.
      View in: PubMed   Mentions:
    42. Persistent HIV incidence among injection drug users in San Francisco during the 1990s: results of five studies. . 2004 Dec 15; 37(5):1667-9. Kral AH, Page-Shafer K, Edlin BR, Kellogg T, Riley E, Gee L, Moss A, Busch M, Klausner JD, Dilley J, McFarland W. PMID: 15577428.
      View in: PubMed   Mentions:
    43. Trends in HIV prevalence among public sexually transmitted disease clinic attendees in the Western region of the United States (1989-1999). . 2004 Sep 01; 37(1):1206-15. Harawa NT, Douglas J, McFarland W, Thiede H, Kellogg TA, Vorhees K, Donovan KM, Bingham TA. PMID: 15319682.
      View in: PubMed   Mentions:
    44. Low incidence and prevalence of hepatitis C virus infection among sexually active non-intravenous drug-using adults, San Francisco, 1997-2000. Sex Transm Dis. 2003 Dec; 30(12):919-24. Hammer GP, Kellogg TA, McFarland WC, Wong E, Louie B, Williams I, Dilley J, Page-Shafer K, Klausner JD. PMID: 14646642.
      View in: PubMed   Mentions: 16     Fields:    Translation:HumansCellsPHPublic Health
    45. Incidence and prevalence of herpes simplex virus type 2 infection in persons seeking repeat HIV counseling and testing. Sex Transm Dis. 2003 Apr; 30(4):331-4. Turner KR, McFarland W, Kellogg TA, Wong E, Page-Shafer K, Louie B, Dilley J, Kent CK, Klausner J. PMID: 12671554.
      View in: PubMed   Mentions: 9     Fields:    Translation:HumansCells
    46. Characterization of sexually transmitted disease clinic patients with recent human immunodeficiency virus infection. J Infect Dis. 2002 Oct 01; 186(7):1019-22. Schwarcz SK, Kellogg TA, McFarland W, Louie B, Klausner J, Withum DG, Katz MH. PMID: 12232844.
      View in: PubMed   Mentions: 13     Fields:    Translation:HumansCells
    47. Continuing increases in sexual risk behavior and sexually transmitted diseases among men who have sex with men: San Francisco, Calif, 1999-2001, USA. Am J Public Health. 2002 Sep; 92(9):1387-8. Chen SY, Gibson S, Katz MH, Klausner JD, Dilley JW, Schwarcz SK, Kellogg TA, McFarland W. PMID: 12197957.
      View in: PubMed   Mentions: 52     Fields:    Translation:Humans
    48. Risk behaviors and HIV incidence among repeat testers at publicly funded HIV testing sites in San Francisco. . 2002 Sep 01; 31(1):63-70. Fernyak SE, Page-Shafer K, Kellogg TA, McFarland W, Katz MH. PMID: 12352152.
      View in: PubMed   Mentions:
    49. Impact of highly active antiretroviral treatment on HIV seroincidence among men who have sex with men: San Francisco. Am J Public Health. 2002 Mar; 92(3):388-94. Katz MH, Schwarcz SK, Kellogg TA, Klausner JD, Dilley JW, Gibson S, McFarland W. PMID: 11867317.
      View in: PubMed   Mentions: 83     Fields:    Translation:Humans
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