Background: Pyrethroid pesticide poisoning cases in developed and developing countries have a high incidence every year. One of the active substances in pyrethroid widely used is cypermethrin. The effects of cypermethrin intoxication on the kidneys, especially in humans, are little to be studied. This study aims to determine the difference in the histopathological image of the Wistar rat’s kidney.Method: The experimental research of the post-test only control group design involved 24 male Wistar rats divided into 4 groups randomly, the control (not given cypermethrin), treatments of 125 mg/kgBW, 250 mg/kgBW, and 500 mg/kgBW. Cypermethrin are given orally for 14 days. After the rats were terminated, the kidney were processed to be paraffin-embedded tissues and stained with HE. Tubular injuries were examined using 400x magnification of light microscope and focused on closure of tubular lumen as well as proteinaceous cast inside the lumens.Results: The results of this study showed that the means of histopathological damage to the kidneys increased from control group to 500 mg/kgBW treatment group. Statistical analysis with One way ANOVA showed significant differences (p<0.001), continued with Post hoc games Howell test, there was a significant differences between control group with 250 mg/kgBW treatment group and 500 mg/kgBW treatment group, and between 125 mg/kgBW treatment group with 250mg/kgBW treatment group and 500 mg/kgBW treatment group. There was no significant difference between the control group with 125 mg/kgBW group and 250 mg/kgBW treatment group with 500 mg/kgBW treatment group.Conclusion: There is a significant difference in renal histopathological  image due to exposure to pyrethroid (cypermethrin) in gradual doses. The image of kidney damages can result in tubules injury  which include: albuminous degeneration with narrowing of the tubular lumen and hyaline cast. The means of tubular injury rate will increase with increasing dose of pyrethroid.

Background Formaldeyde is main substance used for organ embalming and even for foods preservations. However, long and high exposure of formaldeyhde lead to various organs irritations. Honey is well-known for its natural preservative activity expected to be the soultion for the problem so there is safe alternative for organ preservations.Aim Observation and examintaion the difference of macroscopic and microscopics feature of Wistar rats liver after immersion of formaldehyde and randu honey.Methods Experimental with post-test only control group design using 24 male Wistar rats as sample, randomly divided into 4 groups consist of: Group C (preserved with 10% formaldehyde solutions), P1 (preserved with 10% randu honey solutions), P2 (preserved with 20% randu honey solutions) and P3 (preserved with 30% randu honey solutions). The sampels were preserved for 24 hours then macroscopic (smell,color and size) and microscopic study with Hematoxylin-Eosin (HE) stain  using 400x observation performed. Manja Roenigk score were used to accessed the degree of live microsopic damage.Results There are normal cells, mild damage, moderate damage and severe damage respectively in the group C: 36%,47%,17%,0% ; P1: 0%,27%,46%,27% ; P2: 0%,77%,17%,6% ; P3: 47%,33%,17%,3%. Kruskal-Wallis test showed significant results with p=0.000. With Mann-Whitney test, significant results were found between group C with P1 (0.000), C with P2 (0.006), P1 with P2 (0.000), P1 with P3 (0.000) and P2 with P3 (0.003). However, test result were not significant berween group C with P3 (0.684).Conclusions There were differences in macroscopics and microscopic features between Wistar rats liver after immersion in formaldehyde and randu honey. The best features showed in samples preserved in 30% Randu Honey solutions.