<div style="text-align: justify;">The aim of this study was to determine the parasitological traits and productive response in Pelibuey lambs re-infected with gastrointestinal nematodes (GIN) previously infected with different doses of infective larvae (L3). One infection with 60% Haemonchus contortus and 40% Cooperia curticei larvae was induced in three groups of six lambs using oral doses of 100, 200 and 300 L3 per kg of body weight (BW), respectively. Nine weeks post-infection all lambs were treated with albendazole (ABZ). A second parasitic infection was induced using 300 L3 per BW followed for six weeks of parasitological sampled and four lambs of each treatment were slaughtered after this period to count adult nematodes. Results showed reduction of eggs per gram of faeces (EPG) between first (2463&plusmn;4400 EPG) to second infection (327&plusmn;66 EPG) for pre-infected lambs with 300 L3. Through first infection, the packed cell volume (PCV) decreased until 35 days post-infection (32.0% to 26.0%) for all groups. In conclusion Pelibuey lambs infected with 300 L3 showed low re-infection to contribute in the reduction of parasitic traits under tropical climate.</div>

Assessment of acquired resistance in previously infected lambs with gastrointestinal nematodes in a tropical climate

Background: Gastrointestinal infection of small ruminants is becoming a real problem due to the resistance against anthelmintic treatment. These parasitic infections are prevalent among grazing ruminants and result in significant economic losses by reduced production. The aim of the study was to evaluate and estimate the total loud of parasitic infection is small ruminants, sheep&rsquo;s and goats from different farms located in Kor&ccedil;a district. 
 
Methods: This study investigates parasitic infections in sheep and goats across 40 farms situated in Kor&ccedil;a district in southeastern Albania. The primary objective is to assess the prevalence of gastrointestinal parasites within feces samples from mature sheep and goats. In total, 121 feces samples were meticulously collected. Samples were analysed and processed using the Mini-FLOTAC technique in order to identify eggs and oocysts in each herd. 
 
Result: The results of the investigation revealed the presence of Strongyloides papillosus in 45.45% of samples, Ostertagia spp. eggs in 40.9% of samples, Monezia expansa eggs in 27.2% of samples, Dictiocaulus filaria in 22.3% of samples, Nematodirus spathiger eggs in 13.2% of samples, Haemonchus contortus eggs in 13.3%, Cooperia spp. eggs in 9% of samples, Trichostrongylus axei in 9% of samples, Coccidian oocysts in 4.1% of samples and Trichuris ovis in 1.6% of samples.

Assessment of acquired resistance in previously infected lambs with gastrointestinal nematodes in a tropical climate

Epidemiological Data Regarding the Distribution of Gastrointestinal Parasites in Albanian Small Ruminants