Variations in packed cell volume among Gambian cattle: Assessment of biological and environmental determinants in free-range systems

IF 3.1 2区农林科学 Q1 VETERINARY SCIENCES

Veterinary journal Pub Date : 2025-03-09 DOI:10.1016/j.tvjl.2025.106336

Olawale F. Olaniyan , İbrahim Kaya , Momodou Jeng , Lamin F. Ceesay , Amadou Keita , Fatou Janneh , Modou Gaye

{"title":"Variations in packed cell volume among Gambian cattle: Assessment of biological and environmental determinants in free-range systems","authors":"Olawale F. Olaniyan , İbrahim Kaya , Momodou Jeng , Lamin F. Ceesay , Amadou Keita , Fatou Janneh , Modou Gaye","doi":"10.1016/j.tvjl.2025.106336","DOIUrl":null,"url":null,"abstract":"<div><div>The use of packed cell volume (PCV) to monitor health status of cattle is widely known but this prognostic approach can be complex to interpret due to several factors affecting its values. This research therefore aims to explain variations in PCV values with focus on the biological and environmental fixed determinants that would assist veterinary practitioners and scientists in better understanding of such information, especially in the free-range cattle husbandry systems. A total of 921 blood samples covering three cattle genotypes were collected from almost the entire length of The Gambia for PCV analysis by the microhaematocrit technique and then, trypanosomosis diagnosis based on microscopy. The data were analysed using general linear model with the univariate procedure. Further, pairwise comparisons of estimated marginal means were conducted using least significant difference option. Standard errors of means, 95 % confidence intervals, and also descriptive statistics were presented. The overall mean of PCV was 26.6 %, with the minimum and maximum values as 12.0 and 44.0 %, respectively. Trypanosomosis status, sex, age, body condition, feeding type, region of sampling, season of sampling, and region × season interaction are determinants with statistically significant (P < 0.05) effect on PCV. However, there was no significant effect (P > 0.05) of coat colour and genotype on PCV. Considering the observed trypanosome-induced complexity, the effect of trypanosomosis progression on PCV variation requires further investigation. This study demonstrates that there are many determinants that should be carefully considered in routine screening, interpretation, and determination of cattle health status based on PCV.</div></div>","PeriodicalId":23505,"journal":{"name":"Veterinary journal","volume":"311 ","pages":"Article 106336"},"PeriodicalIF":3.1000,"publicationDate":"2025-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Veterinary journal","FirstCategoryId":"97","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S1090023325000401","RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"VETERINARY SCIENCES","Score":null,"Total":0}

引用次数: 0

Abstract

The use of packed cell volume (PCV) to monitor health status of cattle is widely known but this prognostic approach can be complex to interpret due to several factors affecting its values. This research therefore aims to explain variations in PCV values with focus on the biological and environmental fixed determinants that would assist veterinary practitioners and scientists in better understanding of such information, especially in the free-range cattle husbandry systems. A total of 921 blood samples covering three cattle genotypes were collected from almost the entire length of The Gambia for PCV analysis by the microhaematocrit technique and then, trypanosomosis diagnosis based on microscopy. The data were analysed using general linear model with the univariate procedure. Further, pairwise comparisons of estimated marginal means were conducted using least significant difference option. Standard errors of means, 95 % confidence intervals, and also descriptive statistics were presented. The overall mean of PCV was 26.6 %, with the minimum and maximum values as 12.0 and 44.0 %, respectively. Trypanosomosis status, sex, age, body condition, feeding type, region of sampling, season of sampling, and region × season interaction are determinants with statistically significant (P < 0.05) effect on PCV. However, there was no significant effect (P > 0.05) of coat colour and genotype on PCV. Considering the observed trypanosome-induced complexity, the effect of trypanosomosis progression on PCV variation requires further investigation. This study demonstrates that there are many determinants that should be carefully considered in routine screening, interpretation, and determination of cattle health status based on PCV.

查看原文本刊更多论文

冈比亚牛中堆积细胞体积的变化：自由放养系统中生物和环境决定因素的评估。

利用堆积细胞体积（PCV）来监测牛的健康状况是众所周知的，但由于影响其价值的几个因素，这种预后方法的解释可能很复杂。因此，本研究旨在解释PCV值的变化，重点关注生物和环境的固定决定因素，这将有助于兽医从业人员和科学家更好地理解这些信息，特别是在自由放养的畜牧业系统中。从几乎整个冈比亚地区收集了覆盖三种基因型的921份血液样本，通过微红细胞压积技术进行PCV分析，然后基于显微镜进行锥虫病诊断。采用一般线性模型和单变量程序对数据进行分析。此外，两两比较估计的边际均值使用最小显著差异选项进行。给出了均值的标准误差、95%置信区间和描述性统计。PCV的总体平均值为26.6%，最小值为12.0%，最大值为44.0%。锥虫病状况、性别、年龄、体质、饲养方式、采样地区、采样季节、地区与季节交互作用是影响PCV的决定因素，差异均有统计学意义（P < 0.05）。毛色和基因型对PCV无显著影响（P < 0.05）。考虑到观察到的锥虫诱导的复杂性，锥虫病的进展对PCV变异的影响有待进一步研究。该研究表明，在基于PCV的常规筛查、解释和确定牛健康状况时，应该仔细考虑许多决定因素。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Veterinary journal 农林科学-兽医学

CiteScore

4.10

自引率

4.50%

发文量

审稿时长

40 days

期刊介绍： The Veterinary Journal (established 1875) publishes worldwide contributions on all aspects of veterinary science and its related subjects. It provides regular book reviews and a short communications section. The journal regularly commissions topical reviews and commentaries on features of major importance. Research areas include infectious diseases, applied biochemistry, parasitology, endocrinology, microbiology, immunology, pathology, pharmacology, physiology, molecular biology, immunogenetics, surgery, ophthalmology, dermatology and oncology.