Md. Humayun Kabir, Md. Ershaduzzaman, Mohammed Sirajul Islam, Seikh Masudur Rahman, Md. Rezaul Karim, Md. Zakir Hasan, Md. Abu Haris Miah, Md. Yousuf Ali, Shafaat Mahjabun, Sumona Aktar and Md. Shahjahan
Cattle are affected by different types of parasitic diseases that can lead to economic losses to the farmers in terms of reduced growth and production performance and increased mortality. As such, this study was conducted at Animal Health Laboratory of BLRI regional station, Baghabari, Sirajganj to determine the clinical prevalence of various types of parasitic diseases in cattle of different age groups, sexes and seasons of a year. The data were collected during the period of July 2016 to June 2017 from the record book of AHL. Diagnosis of each faeces sample was done by direct observation, indirect smear and sedimentation method for the diagnosis of whole parasites, ova, larvae and cyst of enteric parasites. The total number of faeces sample was 701. It was observed that parasitic infestation was not affected by various body weight (p >0.05) but the age variation had significant differences (p <0.05) in infestation level. According to various parasitic loads multiple infestation observed (p<0.05) in those cattle having higher body weight. However, single infestation (Ascaria) identified in lower body weight (calf). In the Summer, single infestation found higher (44%) followed by double (32%) and non-infestation (17%). Similar patterns observed in Rainy, Autumn and Winter seasons of the studied feces samples. These data indicated higher percentage of single infestation in the tested samples followed by double parasitic loads. In addition, single infestation was higher in Autumn (54%) and Winter (59%) season while double parasitic loads found frequently in Summer (32%) and Rainy (37%) seasons. The frequency of Fasciola (21%) was observed the most followed by Fasciola + Paramphiastomum (13%) and Balantidium coli (10%) in the Summer. The frequency of Fasciola and Balantidium coli identified in similar pattern during Rainy, Autumn and Winter seasons. These data suggested that proper measure should be taken for those specific parasitic infestations in those areas from where feces samples were tested. In the tested feces samples of male and female 15.2% and 17.5% were found for Fasciola in both followed by Balantidium coli, respectively, 15.2% and 14.9% (Table 5). In case of double infestation of Fasciola & Paramphiastomum and Fasciola & Balantidium coli were 12.3% & 12.7% and 7.4% and 7.0%, respectively. This study will be conducted every year from now on and these large set of data can act as a guideline for farther research activities with parasitic diseases eradication and control of the surrounding areas of Baghabari.

