Publications
Academic article
- Tewachew Awoke; Asnake Simieneh; Fregenet Tesfaye et al. (2026). Diagnostic Methods for Cryptosporidiosis in Low- and Middle-Income Countries: A Systematic Narrative Review. (external link)
- Degu Abate; Rea Tschopp; Berhanu Seyoum et al. (2025). Cryptosporidium infection and associated factors among diarrheic children under five years of age in Eastern Ethiopia. (external link)
- Degu Abate; Rea Tschopp; Berhanu Seyoum et al. (2025). Genetic diversity of Cryptosporidium isolates from young children and livestock in eastern Ethiopia. (external link)
- Degu Abate; Lucy Robertson; Berhanu Seyoum et al. (2025). Evaluation of rectal swab compared to bulk stool sampling for detection of Cryptosporidium infection by light-emitting diode auramine-phenol microscopy in young children with diarrhoea. (external link)
- Makeda Semret; Workeabeba Abebe; Lingyuan Kong et al. (2020). Prolonged empirical antibiotic therapy is correlated with bloodstream infections and increased mortality in a tertiary care hospital in Ethiopia: bacteriology testing matters. (external link)
- Cedric P. Yansouni; Daniel Seifu; Michael Libman et al. (2020). A Feasible Laboratory-Strengthening Intervention Yielding a Sustainable Clinical Bacteriology Sector to Support Antimicrobial Stewardship in a Large Referral Hospital in Ethiopia. (external link)
- Øystein Haarklau Johansen; Alemseged Abdissa; Mike Zangenberg et al. (2022). A comparison of risk factors for cryptosporidiosis and non-cryptosporidiosis diarrhoea: A case-case-control study in Ethiopian children. (external link)
- ØYSTEIN HAARKLAU JOHANSEN; Kurt Hanevik; F. Thrana et al. (2015). Symptomatic and asymptomatic secondary transmission of Cryptosporidium parvum following two related outbreaks in schoolchildren. (external link)
- Øystein Haarklau Johansen; Alemseged Abdissa; Ola Bjørang et al. (2022). Oocyst Shedding Dynamics in Children with Cryptosporidiosis: a Prospective Clinical Case Series in Ethiopia. (external link)
- Heidi Lange; ØYSTEIN HAARKLAU JOHANSEN; Line Vold et al. (2014). Second outbreak of infection with a rare Cryptosporidium parvum genotype in schoolchildren associated with contact with lambs/goat kids at a holiday farm in Norway. (external link)
- Yonas Alemu; Alemseged Abdissa; Zeleke Mekonnen et al. (2023). Prevalence and assemblage of Giardia duodenalis in a case-control study of children under 5 years from Jimma, Southwest Ethiopia. (external link)
- Mike Zangenberg; Alemseged Abdissa; ØYSTEIN HAARKLAU JOHANSEN et al. (2019). Metronidazole-sensitive organisms in children with severe acute malnutrition: an evaluation of the indication for empiric metronidazole treatment. (external link)
- Mike Zangenberg; Alemseged Abdissa; Øystein Haarklau Johansen et al. (2019). Critical evaluation of the appetite test for children with severe acute malnutrition. (external link)
- Grazina Rimseliene; Line Vold; Lucy J Robertson et al. (2011). An outbreak of gastroenteritis among schoolchildren staying in a wildlife reserve: Thorough investigation reveals Norway's largest cryptosporidiosis outbreak. (external link)
- Getnet Tesfaw; Dawd S. Siraj; Alemseged Abdissa et al. (2024). Gut microbiota patterns associated with duration of diarrhea in children under five years of age in Ethiopia. (external link)
- Jahid Hasan Tipu; Audun Sivertsen; Jan Egil Afset et al. (2024). Cryptosporidium species and subtypes in Norway: predominance of C. parvum and emergence of C. mortiferum. (external link)
- Mike Zangenberg; ØYSTEIN HAARKLAU JOHANSEN; Alemseged Abdissa et al. (2019). Prolonged and persistent diarrhoea is not restricted to children with acute malnutrition: an observational study in Ethiopia. (external link)
- Øystein Haarklau Johansen; Alemseged Abdissa; Mike Zangenberg et al. (2020). Performance and operational feasibility of two diagnostic tests for cryptosporidiosis in children (CRYPTO-POC): a clinical, prospective, diagnostic accuracy study. (external link)
Conference lecture
- Øystein Haarklau Johansen (2020). Performance and operational feasibility of two point-of-care diagnostic tests for cryptosporidiosis in children: lessons learned from a large diagnostic accuracy study in Ethiopia. (external link)
- Øystein Haarklau Johansen; Alemseged Abdissa; Zeleke Mekonnen et al. (2017). Low-cost point-of-care diagnosis of Cryptosporidium infection in resource limited settings – the CRYPTO-POC study.. (external link)
- Øystein Haarklau Johansen; Alemseged Abdissa; Mike Zangenberg et al. (2019). Prolonged and persistent diarrhoea in children: a case-control study in Ethiopia. (external link)
- Øystein Haarklau Johansen; Alemseged Abdissa; Mike Zangenberg et al. (2019). Auramine-phenol staining and light-emitting diode fluorescence microscopy and a rapid dipstick test for detection of Cryptosporidium infection: a diagnostic accuracy study in a university hospital and a rural health centre in Ethiopia.. (external link)