Md. Emran Hossain,
- Professor, Department of Animal Science and Nutrition, Chattogram Veterinary and Animal Sciences University, Khulshi, Chattogram, Bangladesh
Abstract
Legume-induced bloat in tropical cattle is a complex and significant health challenge that affects livestock productivity and welfare. This review aims to elucidate the multifaceted causes of bloat associated with the consumption of leguminous forages, highlighting both the physiological mechanisms and environmental factors that contribute to this condition. Key factors include the high soluble protein content of legumes, rapid fermentation rates in the rumen, and the formation of stable foam, which obstructs normal gas expulsion. Additionally, environmental conditions, such as rainfall and pasture management practices, exacerbate the risk of bloat in grazing systems. The consequences of bloat are profound, leading to reduced feed intake, impaired nutrient absorption, and, in severe cases, death. The economic implications for farmers are substantial, resulting in increased veterinary costs and decreased milk and meat production. To mitigate the risk of bloat, this review discusses various preventative measures that can be implemented in tropical cattle management systems. These include strategic feeding practices, such as providing dry forages before grazing on legumes, incorporating a balanced mix of grasses and legumes, and utilizing feed additives like poloxalene and ionophores. Furthermore, grazing management strategies, including rotational grazing and monitoring pasture conditions, play a crucial role in reducing bloat incidence. By understanding the underlying causes and consequences of legume-induced bloat, as well as implementing effective preventative strategies, cattle producers can enhance animal welfare and improve the sustainability of livestock production systems in tropical environments. This review serves as a comprehensive resource for researchers, veterinarians, and livestock managers seeking to address the challenges posed by legume-induced bloat in cattle.
Keywords: Bloat, causes, cattle, consequences, legume, preventive measures
Md. Emran Hossain. Legume-Induced Frothy Bloat in Tropical Cattle: Pathophysiology, Consequences and Preventative Measures. Research and Reviews : Journal of Veterinary Science and Technology. 2026; 15(02):-.
Md. Emran Hossain. Legume-Induced Frothy Bloat in Tropical Cattle: Pathophysiology, Consequences and Preventative Measures. Research and Reviews : Journal of Veterinary Science and Technology. 2026; 15(02):-. Available from: https://journals.stmjournals.com/rrjovst/article=2026/view=249082
References
- 1] Yirdachew and G. Mekonnen, “Review on Bloat in Cattle,” 2022, meddocsonline.org. [Online]. Available: https://meddocsonline.org/journal-of-veterinary-medicine-and-animal-sciences/Review-on-bloat-in-cattle.pdf
- [2] R. McMahon et al., “A review of the effects of forage condensed tannins on ruminal fermentation and bloat in grazing cattle,” Can. J. Plant Sci., vol. 80, no. 3, pp. 469–485, 2000, doi: 10.4141/P99-050.
- [3] J. Thompson, B. M. Brooke, G. J. Garland, J. W. Hall, and W. Majak, “Effect of stage of growth of alfalfa on the incidence of bloat in cattle,” Can. J. Anim. Sci., vol. 80, no. 4, pp. 725–727, 2000, doi: 10.4141/A00-065.
- [4] Majak, J. W. Hall, and T. A. McAllister, Practical measures for reducing risk of alfalfa bloat in cattle, vol. 54, no. 4. repository.arizona.edu, 2001. doi: 10.2307/4003120.
- [5] P. Berg et al., “Bloat in cattle grazing alfalfa cultivars selected for a low initial rate of digestion: A review,” Can. J. Plant Sci., vol. 80, no. 3, pp. 493–502, 2000, doi: 10.4141/P99-051.
- [6] Stanford et al., “Effects of alcohol ethoxylate and pluronic detergents on the development of pasture bloat in cattle and sheep,” J. Dairy Sci., vol. 84, no. 1, pp. 167–176, 2001, doi: 10.3168/jds.S0022-0302(01)74466-9.
- [7] Bretschneider, F. J. Santini, J. P. Fay, and C. Faverin, “Effects of maize silage supplementation before lucerne grazing on the occurrence of bloat in cattle,” New Zeal. J. Agric. Res., vol. 44, no. 4, pp. 241–251, 2001, doi: 10.1080/00288233.2001.9513481.
- [8] Saha, M. A. Hossain, and N. S. Juyena, Clinical management and control of clinical and induced bloat in cattle., vol. 23, no. 2. cabidigitallibrary.org, 2006. doi: 10.5555/20083000197.
- [9] H. Buckingham, Factors affecting the stability of protein foams and their possible relevance to the problem of bloat in cattle. ir.wgtn.ac.nz, 1972. [Online]. Available: https://ir.wgtn.ac.nz/items/f6a81ac9-92ba-453c-ba1f-d5e162e25100
- [10] T. Jones, J. W. Lyttleton, and R. T. J. Clarke, “Bloat in cattle: XXXIII. The soluble proteins of legume forages in New Zealand, and their relationship to bloat,” New Zeal. J. Agric. Res., vol. 13, no. 1, pp. 149–156, 1970, doi: 10.1080/00288233.1970.10421204.
- [11] T. Jones, L. B. Anderson, and M. D. Ross, “Bloat in cattle: XXXIX. Detection of protein precipitants (flavolans) in legumes,” New Zeal. J. Agric. Res., vol. 16, no. 3, pp. 441–446, 1973, doi: 10.1080/00288233.1973.10421128.
- [12] T. J. Clarke, W. T. Jones, and C. S. W. Reid, “Bloat in cattle: XLI proteins of saliva as possible genetic markers in breeding programmes to reduce bloat susceptibility in cattle,” New Zeal. J. Agric. Res., vol. 17, no. 4, pp. 411–415, 1974, doi: 10.1080/00288233.1974.10421026.
- [13] L. Mangan, “Bloat in cattle: XI. The foaming properties of proteins, saponins, and rumen liquor,” 1959, Taylor &Francis. doi: 10.1080/00288233.1959.10427123.
- [14] Majak, J. W. Hall, and W. P. McCaughey, “Pasture management strategies for reducing the risk of legume bloat in cattle.,” J. Anim. Sci., vol. 73, no. 5, pp. 1493–1498, 1995, doi: 10.2527/1995.7351493x.
- [15] D. Jackson, R. L. DeVault, S. A. McNairy, B. W. Hatcher, and G. D. Goetsch, “Bloat in Cattle. Its Relationship to a Respiratory Inhibitor in Ladino Clover and to Phosphorus Fertility of the Soil1,” J. Anim. Sci., vol. 21, no. 2, pp. 235–240, 1962, doi: 10.2527/jas1962.212235x.
- [16] M. Meyer, E. E. Bartley, and C. W. Deyoe, “Bloat in Cattle. VII. Relation to Amino Acid Composition of Alfalfa as Affected by Maturity,” J. Dairy Sci., vol. 48, no. 2, pp. 213–216, 1965, doi: 10.3168/jds.S0022-0302(65)88198-X.
- [17] W. HALL, W. MAJAK, A. L. VAN RYSWYK, C. M. KALNIN, and R. E. HOWARTH, “the Relationship of Rumen Cations and Soluble Protein With Predisposition of Cattle To Alfalfa Bloat,” Can. J. Anim. Sci., vol. 68, no. 2, pp. 431–437, 1988, doi: 10.4141/cjas88-048.
- [18] W. HALL, W. MAJAK, R. J. WILLIAMS, and R. E. HOWARTH, “Effect of Daily Weather Conditions on Bloat in Cattle Fed Fresh Alfalfa,” Can. J. Anim. Sci., vol. 64, no. 4, pp. 943–950, 1984, doi: 10.4141/cjas84-106.
- [19] C. Wolfe and A. Lazenby, “Bloat incidence and liveweight gain in beef cattle on pastures containing different proportions of white clover trifolium repens,” Aust. J. Exp. Agric., vol. 12, no. 55, pp. 119–125, 1972, doi: 10.1071/EA9720119.
- [20] W. Hall and W. Majak, “Effect of time of grazing or cutting and feeding on the incidence of alfalfa bloat in cattle,” Can. J. Anim. Sci., vol. 75, no. 2, pp. 271–273, 1995, doi: 10.4141/cjas95-041.
- [21] B. Lowe, “Prevention of bloat in pastured cattle,” Bov. Pract., pp. 27–30, 1998, doi: 10.21423/bovine-vol1998no32.1p27-30.
- [22] Bretschneider, An update on frothy bloat in cattle, vol. 42, no. 3. cabidigitallibrary.org, 2010. doi: 10.5555/20113044590.
- [23] T. Coutinho and …, “Therapeutics evaluation in cases of frothy bloat in cattle,” Ciênc. anim. bras …, 2009, [Online]. Available: https://pesquisa.bvsalud.org/portal/resource/pt/vti-713732
- [24] Majak, G. J. Garland, and T. J. Lysyk, “The effect of feeding hay before fresh alfalfa on the occurrence of frothy bloat in cattle,” Can. J. Anim. Sci., vol. 88, no. 1, pp. 29–31, 2008, doi: 10.4141/CJAS07073.
- [25] E. Bartley and T. G. Nagaraja, “Effect of Lasalocid or Monensin on feedlot (grain) bloat in cattle (1983),” 1983, krex.k-state.edu. doi: 10.4148/2378-5977.2504.
- [26] E. Bartley, T. G. Nagaraja, E. S. Pressman, A. D. Dayton, M. P. Katz, and L. R. Fina, “Effects of lasalocid or monensin on legume or grain (feedlot) bloat.,” 1983, krex.k-state.edu. doi: 10.2527/jas1983.5661400x.
- [27] Hoshino, M. Wakita, and Y. Kobayashi, “Effects of salinomycin on grain bloat in fattening Japanese Black cattle,” J. Anim. Physiol. Anim. Nutr. (Berl)., vol. 57, no. 1–5, pp. 123–129, 1987, doi: 10.1111/j.1439-0396.1987.tb00018.x.
- [28] A. Ayre‐Smith, Pasture Bloat in Cattle, vol. 47, no. 4. cabidigitallibrary.org, 1971. doi: 10.1111/j.1751-0813.1971.tb02130.x.
- [29] Bretschneider, M. Peralta, F. J. Santini, J. P. Fay, and C. Faverin, “Influence of corn silage supplementation before alfalfa grazing on ruminal environment in relation to the occurrence of frothy bloat in cattle,” Anim. Feed Sci. Technol., vol. 136, no. 1–2, pp. 23–37, 2007, doi: 10.1016/j.anifeedsci.2006.08.019.
- [30] Wang, B. P. Berg, L. R. Barbieri, D. M. Veira, and T. A. McAllister, “Comparison of alfalfa and mixed alfalfa-sainfoin pastures for grazing cattle: Effects on incidence of bloat, ruminal fermentation, and feed intake,” Can. J. Anim. Sci., vol. 86, no. 3, pp. 383–392, 2006, doi: 10.4141/A06-009.
- [31] P. Katz, T. G. Nagaraja, and L. R. Fina, “Ruminal changes in monensin- and lasalocid-fed cattle grazing bloat-provocative alfalfa pasture.,” J. Anim. Sci., vol. 63, no. 4, pp. 1246–1257, 1986, doi: 10.2527/jas1986.6341246x.
- [32] Gadberry, D. Lalman, F. White, S. Linneen, and P. Beck, “Meta-analysis of the effects of monensin on growth and bloat of cattle on pasture,” Transl. Anim. Sci., vol. 6, no. 2, 2022, doi: 10.1093/tas/txac031.
- [33] G. C. Dalto et al., “Leguminous bloat in dairy cattle on Trifolium spp. pastures.,” Pesqui. Vet. Bras., vol. 29, no. 5, 2009, doi: 10.1590/S0100-736X2009000500007.
- [34] C. Waghorn, “Bloat in cattle 47 relationships between intra-ruminal pressure, distension, and the volume of gas used to simulate bloat in cows,” New Zeal. J. Agric. Res., vol. 34, no. 2, pp. 213–220, 1991, doi: 10.1080/00288233.1991.10423362.
- [35] I. Paisley and G. W. Horn, “Effect of Inophore on Rumen Characteristics, Gas Production, and Occurence of Bloat in Cattle Grazing Winter Wheat Pasture,” 1998, dasnr54.dasnr.okstate.edu. [Online]. Available: http://dasnr54.dasnr.okstate.edu:8080/beefextension2018/reports/1998/1998-3 Paisley Research Report.pdf
- [36] Kleiber, H. H. Cole, and S. W. Mead, “Bloat in Cattle and Composition of Rumen Gases,” J. Dairy Sci., vol. 26, no. 10, pp. 929–933, 1943, doi: 10.3168/jds.S0022-0302(43)92788-2.
- [37] Majak, R. E. Howarth, K. J. Cheng, and J. W. Hall, “Rumen Conditions That Predispose Cattle to Pasture Bloat,” J. Dairy Sci., vol. 66, no. 8, pp. 1683–1688, 1983, doi: 10.3168/jds.S0022-0302(83)81992-4.
- [38] D. DAVIS and H. W. ESSIG, “Comparison of Three Bloat-Preventing Compounds for Cattle Grazing Clover,” Can. J. Anim. Sci., vol. 52, no. 2, pp. 329–335, 1972, doi: 10.4141/cjas72-037.
- [39] M. Meyer, E. E. Bartley, J. L. Morrill, and W. E. Stewart, “Salivation in Cattle. I. Feed and Animal Factors Affecting Salivation and Its Relation to Bloat,” J. Dairy Sci., vol. 47, no. 12, pp. 1339–1345, 1964, doi: 10.3168/jds.S0022-0302(64)88915-3.
- [40] E. Bartley and I. S. Yadava, “Bloat in Cattle. IV. the Role of Bovine Saliva, Plant Mucilages, and Animal Mucins,” J. Anim. Sci., vol. 20, no. 3, pp. 648–653, 1961, doi: 10.2527/jas1961.203648x.
- [41] T. Jones and J. W. Lyttleton, “Bloat in cattle: XXXVII. The foaming properties of bovine salivary secretions and protozoal proteins,” New Zeal. J. Agric. Res., vol. 15, no. 3, pp. 506–511, 1972, doi: 10.1080/00288233.1972.10430542.
- [42] S. Emery, C. K. Smith, and C. F. Huffman, Feeding penicillin for control of bloat in grazing cattle, and its effect on milk production. cabidigitallibrary.org, 1958. doi: 10.5555/19580401721.
- [43] E. Wright, “Bloat in cattle,” New Zeal. J. Agric. Res., vol. 4, no. 3–4, pp. 203–215, 1961, doi: 10.1080/00288233.1961.10420366.
- [44] L. Mangan, A. T. Johns, and R. W. Bailey, “Bloat in cattle,” New Zeal. J. Agric. Res., vol. 2, no. 2, pp. 342–354, 1959, doi: 10.1080/00288233.1959.10420322.
- [45] Sakauchi and S. Hoshino, “Microbial characteristics of ruminal fluid from feedlot bloat beef cattle,” J. Gen. Appl. Microbiol., vol. 27, no. 2, pp. 145–155, 1981, doi: 10.2323/jgam.27.145.
- [46] T. J. Clarke and R. E. Hungate, “Bloat in cattle: Xxxv microbial activities in the reticulo rumens of cows differently susceptible to legume bloat,” New Zeal. J. Agric. Res., vol. 14, no. 1, pp. 108–121, 1971, doi: 10.1080/00288233.1971.10421307.
- [47] Azad et al., “Characterization of the rumen and fecal microbiome in bloated and non-bloated cattle grazing alfalfa pastures and subjected to bloat prevention strategies,” 2019, nature.com. doi: 10.1038/s41598-019-41017-3.
- [48] J. Cheng, T. A. McAllister, J. D. Popp, A. N. Hristov, Z. Mir, and H. T. Shin, “A Review of Bloat in Feedlot Cattle,” J. Anim. Sci., vol. 76, no. 1, pp. 299–308, 1998, doi: 10.2527/1998.761299x.
- [49] P. Katz, E. E. Bartley, E. S. Pressman, and T. G. Nagaraja, “Effect of Rumensin on legume bloat in cattle (1982),” Kansas Agric. Exp. Stn. Res. Reports, no. 1, pp. 52–53, 1982, doi: 10.4148/2378-5977.2560.
- [50] Khatiwada, Rejuvenation of depleted pasture using bloat-free legumes for high performance cattle grazing. search.proquest.com, 2018. [Online]. Available: https://search.proquest.com/openview/da5852bf597ef9304ca87c49a5352149/1?pq-origsite=gscholar&cbl=18750
- [51] E. Bartley and R. Bassette, “Bloat in Cattle. III. Composition of Foam in Legume Bloat,” J. Dairy Sci., vol. 44, no. 7, pp. 1365–1366, 1961, doi: 10.3168/jds.S0022-0302(61)89890-1.
| Volume | 15 |
| 02 | |
| Received | 20/05/2026 |
| Accepted | 04/07/2026 |
| Published | 06/07/2026 |
| Publication Time | 47 Days |
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