 หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Seroprevalence of Neospora caninum Infections of Dairy Cows in the North-east of Thailand) ผู้เขียน: ดร.สถาพร จิตตปาลพงศ์, ศาสตราจารย์ ,  Arkom Sangwaranond, ดร.เทวินทร์ อินปั๋นแก้ว, รองศาสตราจารย์ , Chamnonjit Phasuk, นางนงนุช ภิญโญภานุวัฒน์ , นายวิษณุวัฒน์ ฉิมน้อย , ชัญญา เก่งระดมกิจ, สินสมุทร แซ่โง้ว, Pornparn Pumhom, Pipat Arunwipat, Tanit Anakewit, Ian D. Robertson สื่อสิ่งพิมพ์:pdf AbstractLivestock development particularly in dairy cows have been hampered by low production including milk and growth rate due to many pathogens including Neospora caninum. N. caninum, an obligate intracellular protozoan parasite, is the causative agent of neosporosis recognized as a major cause of bovine abortion around the world and known to have a detrimental effect on bovine pregnancy and on milk production. Currently, there is no effective method for control of neosporosis since there is less information regarding current status of infections. The objective of this study was to investigate the seroprevalence of neosporosis in dairy cows of the Northeast of Thailand. In 2007, the sera of 445 cows of 55 small holder farms from the top three highest consensuses of dairy farms in the Northeast provinces such as Khon Kaen, Udorn Thani, and Sakon Nakhon were collected. Antibodies to N. caninum were assayed by c-ELISA (VMRD, USA) and 52 (11.7 %) found seropositive. Cows with age more than 5 years had the highest seroprevalence (13 %) compared to age between of 1 and 5 years (11.5%) and less than age of 1 year (6.1%). Khon Kaen had the highest endemic area for N. caninum infections in dairy cows (12.9%). A total of dairy farm infections was 58.2% (32/55). The high incidence of N. caninum infections in cows indicated the risk of Thai farmers to realize and understand the problem of dairy cow’s infertility in their farms. This result would be beneficial for controlling strategy of neosporosis of food animals in Thailand. |
หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Prevalence of Gastro-Intestinal Parasites of Dairy Cows in Thailand) ผู้เขียน:ดร.สถาพร จิตตปาลพงศ์, ศาสตราจารย์, Arkom Sangwaranond, ดร.บุรินทร์ นิ่มสุพรรณ์, รองศาสตราจารย์ , ดร.เทวินทร์ อินปั๋นแก้ว, รองศาสตราจารย์, Chamnonjit Phasuk, นางนงนุช ภิญโญภานุวัฒน์, นายวิษณุวัฒน์ ฉิมน้อย, ชัญญา เก่งระดมกิจ, Pipat Arunwipat, Tanit Anakewith สื่อสิ่งพิมพ์:pdf AbstractGastro-intestinal (GI) parasitic infections remain one of the major constraints to ruminant production in Thailand. Insidious productivity losses through reduced feed intake and decreased efficiency in feed utilization, associated with subclinical or chronic conditions of parasitic infections are often the cause of large economic losses. The objectives of this study were to: 1) assess the prevalence of GI parasitism in dairy cows in Thailand; 2) determine the species of existing GI parasites; and 3) compare GI parasitic rates of cows from different regions of Thailand. The study was conducted in four parts of Thailand. A total of 1,599 fecal samples were collected and subjected to ethyl-acetate centrifugation to identify the stages of any parasites. The overall prevalence of parasitic infection was 46.6 % (745/ 1599). Cows aged between 1 to 5 y had the highest infection rate (51.4 %). Cows older than 5 y and younger than 1 y had rates of 41.8 and 33.8 %, respectively. The highest percentage of infected cows by region was in the South (98.4 %). Cows in the North, Central, and Northeast were had infection rates of 66.4, 18.2 and 16.7 %, respectively. The herd infection rate of GI parasites in dairy farms in the South was the highest (14/14, 100 %) compared to the North (37/42, 88.1 %), Northeast (30/46, 65.2 %), and Central (28/60, 46.7 %). GI parasites were identified as Entamoeba, rumen fluke, coccidia, Strongyles, Fasciola, Moniezia, Trichuris, Strongyloides, and Giardia. The high incidence of parasitism of cows might have been due to the relative low influence of feeding behavior and a deworming program. In circumstances of very high infection, management and treatment is highly recommended. |
หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Current Status of Brucellosis in Dairy Cows of Chiang Rai Province, Thailand) ผู้เขียน:ดร.สถาพร จิตตปาลพงศ์, ศาสตราจารย์, ดร.เทวินทร์ อินปั๋นแก้ว, รองศาสตราจารย์, Arkom Sangwaranond, Chamnonjit Phasuk, นางนงนุช ภิญโญภานุวัฒน์, นายวิษณุวัฒน์ ฉิมน้อย, ชัญญา เก่งระดมกิจ, Chainirund Sununta, Pipat Arunwipat สื่อสิ่งพิมพ์:pdf AbstractCurrent status of brucellosis in dairy cows have an impact on livestock development in Chiang Rai due to transmission and creating infertile cows. Livestock development particularly in dairy cows have been hampered by low production including milk and meat production due to many pathogens including Brucella abortus, a gram negative bacteria, is the causative agent of brucellosis recognized as a major cause of bovine abortion around the world and known to have a detrimental effect on bovine pregnancy outcome and on milk production. Currently, there is no effective method for control of brucellosis. The objective of this study was to investigate the seroprevalence of brucellosis in dairy cows in Chiang Rai, Thailand. From January to June in 2007, the sera of 392 cows in 29 small holder farms from Chiang Rai were collected. Antibodies to B. abortus were determined by c-ELISA (SVANOVIR, Sweden) and 13 (3.3 %) samples were revealed seropositive. Cows between age of 1 and 5 years had the highest seroprevalence (3.8%) compared to cows with more than 5 years (2.8%). Phan district was the highest endemic area for B. abortus infections in dairy cows (60%). A total of dairy farm infections was 24.1% (7/29). The prevalence of individual B. abortus infections on cows was not high but the number of positive farms were rising. This result indicated the factor associated with dairy cow’s infertility in dairy farms. This will be beneficial for control strategy of brucellosis such food safety program of food animals in Chiang Rai. |