 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. |
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 Trypanosoma evansi Infection Causing Abortion in Dairy Cows in Central Thailand) ผู้เขียน:ดร.สถาพร จิตตปาลพงศ์, ศาสตราจารย์, นางนงนุช ภิญโญภานุวัฒน์, ดร.เทวินทร์ อินปั๋นแก้ว, รองศาสตราจารย์, ดร.อาคม สังข์วรานนท์, รองศาสตราจารย์ , Chamnonjit Phasuk, นายวิษณุวัฒน์ ฉิมน้อย, ชัญญา เก่งระดมกิจ, Katsarin Kamyingkird, Nachai Sarataphan, Marc Desquesnes, ดร.พิพัฒน์ อรุณวิภาส, รองศาสตราจารย์ สื่อสิ่งพิมพ์:pdf AbstractAbortion in dairy cows is the major factor affecting livestock development in Thailand and is caused by many diseases. Trypanosomosis is one of these factors and also results in an immunosuppressive effect in cattle. The objective of this study was to investigate the prevalence of trypanosomosis in dairy cows in central Thailand. From March to September 2007, 544 samples were collected from 105 farms in the five major dairy provinces of Kanchanaburi, Ratchaburi, Nakhon Pathom, Saraburi and Lop Buri. ELISA was performed to test all sera. The overall prevalence of T. evansi infection in dairy cows was 8.1% (44/544) and herd prevalence was 19.2% (20/105). The highest individual prevalence was found at Saraburi (17.4%, 21/121) but the highest number of herd infections was at Nakhon Pathom (30%, 6/ 20). The parity-four and four-plus cows were 3.7 times more likely to be infected than heifers and parity-one cows (P<0.034). Large herds (40 milking cows) were found to be 5.4 times more infected than small herds (P<0.021). The results found that trypanosome infection might be the predisposing cause of other diseases and is a barrier to productivity gains in dairy herds. |
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. |