domestic animal

家畜
  • 文章类型: Journal Article
    Toscana病毒是一种沙蝇传播的人类病原体,属于Phenuiviridae科的Phlebovirus属。它正在北非出现,对公众健康构成了复杂的威胁。TOSV严重影响了阿尔及利亚北部暴露于沙蝇的人们。最近在阿尔及利亚通过使用狗血清发现了更大的分布。在阿尔及利亚北部,多次发现狗暴露于TOSV,最近检测到4.56%具有各自的中和抗体。然而,仅在各种家畜中的狗中观察到TOSV的证据。因此,我们试图评估221只家畜的血清,包括牛,绵羊,山羊,兔子和马,以鉴定TOSV中和抗体的存在。该研究于2017年在布利达省的11个地区进行,美狄亚,阿尔及尔,Tipaza,AinDefla,北部中心的Tissemsilt,和塞蒂夫,米拉,TiziOuzou,阿尔及利亚东北部的Jijel。阳性结果为14.6%(12/82)牛,17.18%(11/64)羊,15%(3/20)马和3.33%(1/30)山羊,而兔子保持阴性。阳性样本主要来自北部中心,新的领域被首次发现。血清阳性率被注意到与样本来源非常强相关(p<0.01)。观察到女性(OR=4.09)更可能被感染。我们的发现进一步证明了TOSV在阿尔及利亚的传播。此外,他们揭示了家畜在其自然周期中的潜在作用(p=0.00731)。这一事实强调了阐明牲畜对沙蝇传播的静脉病毒流行病学的确切贡献的重要性,以及它们对公众健康的影响。
    Toscana virus is a sandfly-borne human pathogen belonging to Phlebovirus genus into Phenuiviridae family. It is emerging in north Africa posing a complex threat to public health. TOSV is heavily affecting sandfly-exposed people in northern Algeria. A larger distribution has recently been stated in Algeria by using dog sera. Dog exposure to TOSV was repeatedly identified in north Algeria, with 4.56% lately detected to possess respective neutralizing antibodies. However, evidence for TOSV has only been observed in dogs among various species of domestic animals. Therefore, we attempted to assess sera from 221 livestock comprising cattle, sheep, goats, rabbits and horses, to identify the presence of TOSV neutralizing antibodies. The study was conducted during 2017, in 11 areas from the governorates of Blida, Medea, Algiers, Tipaza, Ain Defla, Tissemsilt in the north center, and Setif, Mila, Tizi Ouzou, Jijel in the northeast of Algeria. Positive results were obtained in 14.6% (12/82) cattle, 17.18% (11/64) sheep, 15% (3/20) horses and 3.33% (1/30) goats, whereas rabbits remained negative. Positive samples originated mainly from the north centre, with new areas being first-ever detected. The seroprevalence was noticed to be very strongly related to sample origin (p < 0.01). Females (OR=4.09) were observed to be more likely infected. Our findings represent a further proof of TOSV circulation in Algeria. Moreover, they revealed a potential role of livestock (p = 0.00731) in its natural cycle. This fact emphasize how important is to elucidate the exact contribution of livestock to the epidemiology of sandfly-borne phleboviruses, and their impact on public health.
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  • 文章类型: Journal Article
    Blastocystis is a common intestinal protozoan parasite of humans and a variety of animal species. To date, the prevalence of Blastocystis and major subtypes distribution in the domestic animals inhabiting in the Qinghai-Tibetan Plateau Area (QTPA) of China is yet poorly studied. In this study, we investigated the distribution and genetic diversity of Blastocystis in seven animal species in QTPA in China. Four hundred and five fresh fecal samples were collected from domestic animals in Qinghai, Yunnan, and Tibet of China and analyzed using nested PCR and SSU rRNA gene sequencing. It was found that the overall prevalence of Blastocystis infection was 40.2% (163/405) in the animals studied. The most predominant subtype of Blastocystis was ST10 (57.7%) followed by ST14 (28.8%) and ST2 (13.5%). These results reveal the epidemiological features of Blastocytis infection in animals in the high altitude plateau area. The finding of presence of ST2 in a number of animal species suggests a zoonotic nature of Blastocystis and might be of importance of public health.
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  • 文章类型: Journal Article
    This study investigated whether individual behavioural characteristics of piglets and stress induced by experience with humans can influence learning performance. After weaning, piglets received a chronic experience with humans to modulate their emotional state: rough (ROU), gentle (GEN), or minimal (MIN) experience. Simultaneously, they were trained on a discrimination task. Afterward, their behaviour during challenge tests was assessed. The first learning step of the task involved associating a positive sound cue with a response (approach a trough) and success of piglets depended mostly on motivation to seek for reward. Although the experience with humans did not have direct effect, the degree of fear of handler, measured based on their reactivity to a human approach test, was related to motivation to seek rewards and learning speed of this first step in stressed ROU piglets, but not in MIN and GEN piglets. In contrast, the second learning step was more cognitively challenging, since it involved discrimination learning, including negative cues during which piglets had to learn to avoid the trough. Locomotion activity, measured during an open-field test, was associated with performance of the discrimination learning. To conclude, fearfulness towards humans and locomotion activity are linked with learning performance in relation to task complexity, highlighting the necessity to take into account these factors in animal research and management.
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