2025
Itani, K., Ahmad, M., Ghimire, S., Schuller, R.B., Apajalahti, J., Smith, A. & Svihus, B. (2025) Interaction between feeding regimen, NSPase enzyme and extent of grinding of barley-based pelleted diets on the performance, nutrient digestibility and ileal microbiota of broiler chickens. Bristish Poultry Science (in press).
2024
Walker, H., Vartiainen, S., Apajalahti, J., Taylor-Pickard, J., Nikodinoska, I., Moran, C.A. (2024) The Effect of including a Mixed-Enzyme Product in Broiler Diets on Performance, Metabolizable Energy, Phosphorus and Calcium Retention. Animals. 2024; 14(2):328.
Davies, C., González-Ortiz, G., Rinttilä, T., Apajalahti, J., Alyassin, M., Bedford, M.R. (2024). Stimbiotic supplementation and xylose-rich carbohydrates modulate broiler’s capacity to ferment fibre. Frontiers in Microbiology 2024; 14:( 1664-302X)
Svihus, B., Ahmad, M., Rinttilä, T., Apajalahti, J., & Hetland, H. (2024). Effect of wheat coarseness and pellet quality on performance and particle size preference of broiler chickens fed diets based on wheat and maize. Journal of Applied Poultry Research, 33(3), 100436.
Itani, K., Apajalahti, J., Smith, A., Ghimire, S., & Svihus, B. (2024). The effect of increasing the level of oat hulls, extent of grinding and their interaction on the performance, gizzard characteristics and gut health of broiler chickens fed oat-based pelleted diets. Animal Feed Science and Technology, 308, 115858.
2022
Rinttilä, T., Moran, C.A., Apajalahti J. DHA-Rich Aurantiochytrium Biomass, a Novel Dietary Supplement, Resists Degradation by Rumen Microbiota without Disrupting Microbial Activity. Applied Microbiology. 2022; 2(1):53-72.
Bedford, M. R., & Apajalahti, J. H. (2022). The influence of nutrition on intestinal disease with emphasis on coccidiosis. TFO Collections, 504–520.
2021
Bedford, M.R. and Apajalahti, J.H. (2021), The role of feed enzymes in maintaining poultry intestinal health. J Sci Food Agric, 102: 1759-1770.
Yiannikouris, A., Apajalahti, J., Kettunen, H., Ojanperä, S., Bell, A. N. W., Keegan, J. D., and Moran, C. A. (2021). Efficient Aflatoxin B1 Sequestration by Yeast Cell Wall Extract and Hydrated Sodium Calcium Aluminosilicate Evaluated Using a Multimodal In-Vitro and Ex-Vivo Methodology Toxins 13, no. 1: 24.
Yiannikouris, A., Apajalahti, J., Siikanen, O., Dillon, G.P., and Moran, C.A. (2021). Saccharomyces cerevisiae Cell Wall-Based Adsorbent Reduces Aflatoxin B1 Absorption in Rats. Toxins 2021, 13, 209.
González-Ortiz G., Lee S. A., Vienola K., Raatikainen K., Jurgens G., Apajalahti J., Bedford M. R. (2021). Interaction between xylanase and a proton pump inhibitor on broiler chicken performance and gut function, Animal Nutrition, Volume 8, p. 277-288.
Salami, S. A., Devant, M., Apajalahti, J., Holder, V., Salomaa, S., Keegan, J. D., & Moran, C. A. (2021). Slow-Release Urea as a Sustainable Alternative to Soybean Meal in Ruminant Nutrition. Sustainability, 13(5), 2464.
2020
Rinttilä, T., Ülle, K., Apajalahti, J., Timmons, R. & Moran, C.A. (2020). Design and validation of a real-time PCR technique for assessing the level of inclusion of fungus-and yeast-based additives in feeds. Journal of Microbiological Methods, 171:105867.
Vartiainen, S., Yiannikouris, A., Apajalahti, J. & Moran, C.A. (2020). Comprehensive evaluation of the efficiency of yeast cell wall extract to adsorb ochratoxin A and mitigate accumulation of the toxin in broiler chickens. Toxins, 12: 37.
Felice, Valeria D., O’Gorman, Denise M., Apajalahti, J., Rinttilä, T., O’Brien, Nora M., Hyland, Niall P., (2020). A Marine-Derived, Multi-Mineral Supplement Influences Bacterial Fermentation and Short Chain Fatty Acid Profile In Vitro. Journal of Medicinal Food, Vol. 24, no. 5.
Apajalahti, J., Vienola, K., Raatikainen, K., Kettunen, H., Vuorenmaa, J., (2020). Distribution, Metabolism, and Recovery of Resin Acids in the Intestine and Tissues of Broiler Chickens in a Feeding Trial With Tall Oil Fatty Acid-Supplemented Diets. Frontiers in Veterinary Science, vol 7, p. 437.
González-Ortiz G., Olukosi O.A., Jurgens G., Apajalahti J., Bedford M.R. (2020) Short-chain fatty acids and ceca microbiota profiles in broilers and turkeys in response to diets supplemented with phytase at varying concentrations, with or without xylanase. Poultry Science. Vol 99:4, p. 2068-2077.
2019
Apajalahti, J. & Rinttilä, T. (2019). Assessing the complex ecology of intestinal microbiome. In: The value of fibre – engaging the second brain for animal nutrition. G. González-Ortiz et al. (ed.). Wageningen Academic Publishers, 2019, p. 281-298.
Apajalahti, J., Vienola, K., Raatikainen, K., Holder, V., & Moran, C. A. (2019). Conversion of branched-chain amino acids to corresponding isoacids-an in vitro tool for estimating ruminal protein degradability. Frontiers in Veterinary Science, 6, 311.
González-Ortiz, G., Dos Santos, T.T., Vienola, K., Vartiainen, S., Apajalahti, J., & Bedford, M.R. (2019). Response of broiler chickens to xylanase and butyrate supplementation. Poultry Science, 98: 3914-3925.
2018
Bedford, M.R., & Apajalahti, J. (2018). Exposure of a broiler to a xylanase for 35d increases the capacity of cecal microbiome to ferment soluble xylan. In: Proc. Poultry Science Association 107th Annual Meeting 2018, San Antonio, Texas, USA. E-Supplement (Vol. 1, pp. 98-99).
Currie, D., Green, M., Dufailu, O.A., Matthaios, P., Soultanas, P., McCartney, E., Lester, H., Van den Eede, L., Apajalahti, J. & Mahdavi, J., (2018). Dietary supplementation with ferric tyrosine improves zootechnical performance and reduces caecal Campylobacter spp. load in broilers. British Poultry Science, 59:646-653.
Whelan, R.A., Doranalli, K., Rinttilä, T., Vienola, K., Jurgens, G. & Apajalahti, J. (2018). The impact of Bacillus subtilis DSM 32315 on the pathology, performance, and intestinal microbiome of broiler chickens in a necrotic enteritis challenge. Poultry Science, 98:3450-3463.
Moran, C.A., Keegan, J.D., Vienola, K. & Apajalahti, J. (2018). Broiler Tissue Enrichment with Docosahexaenoic Acid (DHA) through Dietary Supplementation with Aurantiochytrium limacinum Algae. Food and Nutrition, 9:1160-1173.
Vienola, K., Jurgens, G., Vuorenmaa, J. & Apajalahti, J. (2018). Tall oil fatty acid inclusion in the diet improves performance and increases ileal density of lactobacilli in broiler chickens. British Poultry Science, 59:349-355.
2017
Lee, S.A., Apajalahti, J., Vienola, K., González-Ortiz, G., Fontes, C.M.G.A. & Bedford, M.R. (2017). Age and dietary xylanase supplementation affects ileal sugar residues and short chain fatty acid concentration in the ileum and caecum of broiler chickens. Animal Feed Science and Technology, 234:29-42.
Apajalahti, J. (2017). Approaches for studying connections between intestinal microbiota, diet and performance in broiler chickens. Proc. 6th International Broiler Nutritionists’ Conf. Queenstown, NZ.
Peisker, M., Stensrud, E., Apajalahti, J. & Sifri, M. (2017). Morphological Characterization of Pichia guilliermondii and Saccharomyces cerevisiae yeast and their Effects on Adherence of Intestinal Pathogens on Piglet and Chicken Epithelium. Journal of Animal Research and Nutrition, 2:1-7.
Kettunen, H., Van Eerden, E., Lipiński, K., Rinttilä, T., Valkonen, E. & Vuorenmaa. J. (2017). Dietary resin acid composition as a performance enhancer for broiler chickens. Journal of Applied Animal Nutrition, 5:1-8.
2016
Classen, H.L., Apajalahti, J., Svihus, B. & Choct, M. (2016). The role of the crop in poultry production. World’s Poultry Science Journal, 72:459-472.
Apajalahti, J. & Vienola, K. (2016). Interaction between chicken intestinal microbiota and protein digestion. Animal Feed Science and Technology, 221:232-330.
Kettunen, H., Vuorenmaa, J., Gaffney, D. & Apajalahti, J. (2016). Yeast hydrolysate product enhances ruminal fermentation in vitro. Journal of Applied Animal Nutrition, 4:1-7.
Leeuw, K. J., Meissner, H.H., Henning, P.H., Siebrits, F.K., Apajalahti, J.H.A. & Kettunen, A. (2016). Effects of virginiamycin and monensin administered alone or together with Megasphaera elsdenii strain NCIMB 41125 on in vitro production of lactate and VFA and the effects of monensin and M. elsdenii strain NCIMB 41125 on health and performance of feedlot steers. Livestock Science, 183:54-62.
2015
Dersjant-Li, Y., Van De Belt, K., Van Der Klis, J.D., Kettunen, H., Rinttilä, T. & Awati, A. (2015). Effect of multi-enzymes in combination with a direct-fed microbial on performance and welfare parameters in broilers under commercial production settings. Journal of Applied Poultry Research, 24:80-90.
Kettunen, H., Vuorenmaa, J., Rinttilä, T., Grönberg, H., Valkonen, E. & Apajalahti, J. (2015). Natural resin acid–enriched composition as a modulator of intestinal microbiota and performance enhancer in broiler chicken. Journal of Applied Animal Nutrition, 3:1-9.
2014
Apajalahti, J. (2014). Impact of fibre on intestinal microbiota. In: Inspire Proceedings, International Non-Starch Polysaccharide Forum 2014, 67-74.
Pavšič-Vrtač, K., Ojanperä, S., Apajalahti, J., Šrimpf, K. & Tavčar-Kalcher, G. (2014). Analytical procedures for the determination of aflatoxin B 1 in eggs of laying hens using immunoaffinity columns and liquid chromatography with post-column derivatisation and fluorescence detection. Food Analytical Methods, 7:1917-1924.
Meissner, H.H., Henning, P.H., Leeuw, K.J., Hagg, F.M., Horn, C.H., Kettunen, A. & Apajalahti, J.H.A. (2014). Efficacy and mode of action of selected non-ionophore antibiotics and direct-fed microbials in relation to Megasphaera elsdenii NCIMB 41125 during in vitro fermentation of an acidosis-causing substrate. Livestock Science, 162:115-125.
2013
Moran, C.A., Kettunen, H., Yiannikouris, A., Ojanperä, S., Pennala, E., Helander, I.M. & Apajalahti, J. (2013). A dairy cow model to assess aflatoxin transmission from feed into milk – Evaluating efficacy of the mycotoxin binder Mycosorb®. Journal of Applied Animal Nutrition, 2:1-7.
Moran, C.A., Apajalahti, J., Yiannikouris, A., Ojanperä, S. & Kettunen, H. (2013). Effects of low dietary aflatoxin B1 on broiler liver concentration without and with Mycosorb® toxin binder. Journal of Applied Animal Nutrition, 2:1-3.
Yiannikouris, A., Kettunen, H., Apajalahti, J., Pennala, E. & Moran, C.A. (2013). Comparison of the sequestering properties of yeast cell wall extract and hydrated sodium calcium aluminosilicate in three in vitro models accounting for the animal physiological bioavailability of zearalenone. Food Additives & Contaminants, 30:1641-1650.
Rinttilä, T. & Apajalahti, J. (2013). Intestinal microbiota and metabolites-Implications for broiler chicken health and performance. Journal of Applied Poultry Research, 22:647-658.
2012
Apajalahti, J., Rinttilä, T. & Kettunen, A. (2012). Does the composition of intestinal microbiota determine or reflect feed conversion efficiency? In: Proceedings of the 23rd Australian Poultry Science Symposium, pp. 32-39.
Hang, I., Rinttilä, T., Zentek, J., Kettunen, A., Alaja, S., Apajalahti, J., Harmoinen, J., de Vos, W.M. & Spillmann, T. (2012). Effect of high contents of dietary animal-derived protein or carbohydrates on canine faecal microbiota. BMC Veterinary Research, 8:90.
2010
Ojanperä, S., Leinonen, A., Apajalahti, J., Lauraeus, M., Alaja, S., Moisander, T. & Kettunen, A. (2010). Characterization of microbial contaminants in urine. Drug Testing and Analysis, 2:576–581.
van Zijderveld, S.M., Gerrits, W.J.J., Apajalahti, J.A., Newbold, J.R., Dijkstra, J., Leng, R.A. & Perdok, H.B. (2010). Nitrate and sulfate: Effective alternative hydrogen sinks for mitigation of ruminal methane production in sheep. Journal of Dairy Science, 93:5856-5866
Vaara, M., Siikanen, O., Apajalahti, J., Fox, J., Frimodt-Møller, N., He, H., Poudyal, A., Li, J., Nation, R.L. & Vaara, T. (2010). A novel polymyxin derivative that lacks the fatty acid tail and carries only three positive charges has strong synergism with agents excluded by the intact outer membrane. Antimicrobial Agents and Chemotherapy, 54:3341-3346.
Vaara, M., Siikanen, O., Apajalahti, J., Frimodt-Møller, N. &Vaara, T. (2010). Susceptibility of carbapenemase-producing strains of Klebsiella pneumoniae and Escherichia coli to the direct antibacterial activity of NAB739 and to the synergistic activity of NAB7061 with rifampicin and clarithromycin. Journal of Antimicrobial Chemotherapy, 65:942-945.
2009
Rodríguez-Minguela, C.M., Apajalahti, J.H., Chai, B., Cole, J.R. & Tiedje, J.M. (2009). Worldwide prevalence of class 2 integrases outside the clinical setting is associated with human impact. Applied and Environmental Microbiology, 75:5100-5110.
Apajalahti, J., Rademacher, M., Htoo, J., Redshaw, M. & Kettunen, A. (2009). Divergent modulation of swine ileal microbiota by formic acid and methionine hydroxy analogue-free acid. Animal, 3:817-825
Verberkmoes, N.C., Russell, A.L., Shah, M., Godzik, A., Rosenquist, M., Halfvarson, J., Lefsrud, M.G., Apajalahti, J., Tysk, C., Hettich, R.L. & Jansson, J.K. (2009). Shotgun metaproteomics of the human distal gut microbiota. ISME Journal, 3:179-189.
2008
Vaara, M., Fox, J., Loidl, G., Siikanen, O., Apajalahti, J., Hansen, F., Frimodt-Møller, N., Nagai, J., Takano, M. & Vaara, T. (2008). Novel polymyxin derivatives carrying only three positive charges are effective antibacterial agents. Antimicrobial Agents and Chemotherapy, 52:3229-3236.
Dicksved, J., Halfvarson, J., Rosenquist, M., Järnerot, G., Tysk, C., Apajalahti, J., Engstrand, L. & Jansson, J.K. (2008). Molecular analysis of the gut microbiota of identical twins with Crohn’s disease. ISME Journal, 2:716-727.
2007
Abbas Hilmi, H.T., Surakka, A., Apajalahti, J. & Saris, P.E. (2007). Identification of the most abundant lactobacillus species in the crop of 1- and 5-week-old broiler chickens. Applied and Environmental Microbiology, 73:7867-7873.
2006
McCracken, K.J., Murphy, T.C., Bedford, M.R. & Apajalahti, J. (2006). Chicken caecal microflora correlates with ME:GE using wheat-based diets. In: Proceedings of the XII WPSA European Poultry Conference, Verona, Italy.
Apajalahti, J. & Kettunen, A. (2006). Microbes of the chicken gastrointestinal tract. In: G.C. Perry (ed), Avian gut function in health and disease. CABI Publishing, Wallingford, pp. 124-137.
Apajalahti, J. & Kettunen, A. (2006). Rational development of novel microbial modulators. In: Barug, D., de Jong, J., Kies, A.K. & Verstegen, M.W.A. (eds). Antimicrobial growth promoters. Where do we go from here? Wageningen academic publishers, Wageningen, pp. 165-181.
2005
Apajalahti, J.H.A. (2005). Rational development of novel microbial modulators. Proceedings of Antimicrobial growth promoters: Worldwide ban on the horizon, Jan 1 – Feb 1, Noordwijk aan Zee, The Netherlands, pp. 39-41.
Apajalahti, J. (2005). Comparative gut microflora, metabolic challenges and potential opportunities. Journal of Applied Poultry Research, 14:444-453.
